CN108135525A - E.E.G measurement electrode - Google Patents
E.E.G measurement electrode Download PDFInfo
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- CN108135525A CN108135525A CN201680058264.XA CN201680058264A CN108135525A CN 108135525 A CN108135525 A CN 108135525A CN 201680058264 A CN201680058264 A CN 201680058264A CN 108135525 A CN108135525 A CN 108135525A
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Abstract
The present invention relates to a kind of E.E.G measurements with electrode (10), it includes the pectination base material (12) being made of elastomer and the structure for being formed in the pectination base material, it is characterized in that, the pectination base material (12) includes support portion (14) and broach row (17), the broach row (17) are made of the multiple broach (16) being provided projectingly from the support portion (14) one row, the structure is formed in the one side of the multiple broach (16) along broach row (17), the structure includes multiple nano-carbon materials, the pectination base material (12) is fixed on while the reticular structure that the multiple nano-carbon material formation is connected to each other.
Description
Technical field
The present invention relates to a kind of E.E.G measurement electrodes.
Background technology
As existing E.E.G measurement electrode, it is common to use be inserted into conductive paste between the scalp and electrode of subject
Type.Conductive paste has the function of fixation measuring site location other than reducing the contact impedance between scalp and electrode, but
It is due to needing to remove it after the measurement, bringing the trouble of operation.
Therefore, in recent years, a kind of electrode (dry electrode) that low contact impedance is ensured that without using conductive paste is developed.
As dry electrode, such as propose the dry electrode of more pin-types (for example, non-patent literature 1) used on hair band and installation
The dry electrode of more pin-types (for example, non-patent literature 2) on head-shield.In these dry electrodes, more pins are by hard metal system
Into.
In addition, in order to mitigate the burden of subject, it is proposed that set in the front end for the protruding portion being made of rubber by metal
The E.E.G of the contact site of composition is measured with electrode (for example, patent document 1) or by using metal spring, can be made by gold
Belong to the E.E.G measurement electrode (for example, patent document 2) that the spherical front end of manufacture stretches, swings, rotating.
Existing technical literature
Patent document
Patent document 1：Special open 2013-111361 bulletins
Patent document 2：Special open 2013-240485 bulletins
Non-patent literature
Non-patent literature 1：Honda, strategy create research propulsion cause CREST, research field " advanced comprehensive sensing
Technology ", research topic " that creates the information environment of brain safety integrates sensor-based system based on wearable brain function "
Non-patent literature 2：The dry electrode " g.SAHARA " of activity manufactured by g-tec companies, network address ＜ URL：http://
Www.gtec.at/Products/Electrodes-and-Sensors/g.SAHARA-Spe cs-Features ＞
Invention content
The invention technical task to be solved
But the electrode of the non-patent literature 1 and 2 has a problem that, i.e., since more pins are by hard metal structure
Into, therefore subject does not feel well and brings larger burden to scalp.
In the electrode of patent document 1, due to being mixed to assign desired electric conductivity to the protruding portion being made of rubber
Close a large amount of conductive material, therefore the intrinsic flexibility and buffering of rubber are reduced and are hardened.When the protruding portion and head of hard
Bark graft can make subject feel pain, and poor with the close property of scalp when touching, making it difficult to accurately measure E.E.G.In addition,
When using expensive conductive material, it is impossible to inhibit manufacture cost.
In the electrode of patent document 2, due to the complexity of structure, poor flow occurs at contact point, thus may
It can there is a situation where can not carry out E.E.G measurement well.In addition, due to complicated, manufacture is of high cost, and it is raw to be not suitable for batch
Production.
E.E.G measurement in, due to hair obstruction and impedance value rise, cannot accurately be tied in hair portion
Fruit.If the influence of hair can be reduced as far as, the precision of E.E.G measurement can also be improved in hair portion.
Therefore, the purpose of the present invention is to provide a kind of E.E.G measurement electrodes, just can be abundant without using conductive paste
Ensure the electric conductivity contacted with scalp, mitigate the burden of subject, it being capable of accurately measure E.E.G even if hair portion.
To solve the technical solution of technical task
According to E.E.G measurement electrode of the present invention, including the pectination base material being made of elastomer and it is formed in the pectination base
The structure of material, which is characterized in that the pectination base material includes support portion and broach and arranges, and the broach is arranged by from the support portion
The multiple broach being provided projectingly to one row are formed, and are formed in the one side of the multiple broach arranged along the broach described
Structure, the structure include multiple nano-carbon materials, the reticular structure that the multiple nano-carbon material formation is connected to each other
While be fixed on the pectination base material.
The effect of invention
According to the present invention, E.E.G measurement includes the pectination base material that is made of elastomer with electrode, in the pectination base material along
One side in multiple broach of broach row is contacted with the scalp of subject.When multiple broach scratch beginning hair, scheduled side
Face can avoid hair and touch scalp.
In pectination base material, the structure of the reticular structure connected with multiple nano-carbon materials is formed in one side.
By the way that the one side for being formed with structure is made to be contacted with scalp, it just can enough make E.E.G measurement electrode and scalp without using conductive paste
Contact, being capable of accurately measure E.E.G even if also ensuring that sufficient conducting in hair portion.Due to elastomer have flexibility and
Resiliency, therefore even if the senses of discomfort such as pain will not be brought to subject by applying pressure, can reduce the heavy burdens.
Description of the drawings
Fig. 1 is the vertical view of the structure for the E.E.G measurement electrode for showing present embodiment.
Fig. 2 is the front view of the structure for the E.E.G measurement electrode for showing present embodiment.
Fig. 3 is the schematic diagram for illustrating CNT coating paper structures.
Fig. 4 is the SEM image of CNT coated papers, and Fig. 4 A are 50 times of images, and Fig. 4 B are 10000 times of images.
Fig. 5 is the schematic diagram of the structure for the E.E.G measurement electrode for showing embodiment.
Fig. 6 is the schematic diagram for showing the measuring electrod assembly structure of electrode contact impedance.
Fig. 7 is the chart for showing relationship between CNT concentration and bulk resistivity.
Specific embodiment
Hereinafter, it will be explained in more detail with reference to the drawing embodiments of the present invention.
1. overall structure
As shown in Figure 1, E.E.G is measured includes the pectination base material 12 with support portion 14 and broach row 17 with electrode 10, it is described
Broach row 17 include the multiple broach 16 being provided projectingly from the row of support portion 14 1.In E.E.G measurement in electrode 10, pectination base
Become the scalp contact surface 18 contacted with scalp in material 12 along the one side of multiple broach 16 of broach row 17 (with reference to Fig. 2).
As shown in Fig. 2, leading portion portion 16b is thinner than base end part 16a in a thickness direction for multiple broach 16, and from the midway of length direction to
The side opposite with scalp bearing surface 18 tilts.
In the present embodiment, unshowned structure is set by the one side in multiple broach 16 along broach row 17
Body forms scalp contact surface 18.Structure is formed as the inside for not being located at pectination base material 12 but in surface exposing.Due to knot
Structure body is conductive, therefore scalp contact surface 18 is conductive.Body forms conductive path in pectination base material 12 with this configuration.
The structure at least formed in pectination base material 12 along the one side of multiple broach 16 of broach row 17.It is supporting
In the case that the surface in portion 14 is also formed with structure, body can be ensured that with this configuration leads with the one sides of multiple broach 16
It is logical.As long as the interval between adjacent fingers 16 in broach row 17 can be kept, structure, which can also be arranged on, is referred to as multiple combs
The residual surface of the pectination base material 12 of the another side of tooth 16.
In the present embodiment, unshowned structure is made of nano-carbon material.Carbon is used to receive as nano-carbon material
Mitron (hereinafter referred to as CNT).Multiple CNT connect to each other to form the structure with reticular structure, and are fixed on pectination base material
On 12.Connection said here includes physical connection (only contacting).Since CNT itself has high conductivity, even if
After the structure of the reticular structure based on multiple CNT is formed, high conductivity can also be kept.It is this with high conductivity
Structure is suitable as the conductive path of E.E.G measurement electrode 10.As noted previously, as the structure bodily form in present embodiment
Expose as on the surface of pectination base material 12, therefore conductive path is also formed in inside surface rather than comb base material 12.
The structure of reticular structure with CNT be without using adhesive etc. and utilize Van der Waals force possessed by CNT and
It is formed, and can be fixed in pectination base material 12 along the one side of multiple broach 16 of broach row 17.Alternatively, with CNT's
The structure of reticular structure can also be by being mixed into CNT by general adhesive etc. in the range that the electric conductivity of CNT is not damaged
In formed, and be fixed in pectination base material 12 along the one side of multiple broach 16 of broach row 17.No matter in which kind of situation
Under, CNT is attached directly in pectination base material 12 along the one side of multiple broach 16 of broach row 17.
In particular, in the case of without using adhesive etc., the surface of CNT fiber itself will not be by coverings such as adhesives.Cause
This, the structure with reticular structure is to be formed in the state of no intermediary by connecting CNT each other.Since CNT consolidates
Some high conductivity will not be by any loss, therefore forms on pectination base material 12 the E.E.G measurement electrode 10 of the structure
The intrinsic high conductivity of CNT can be given full play to.
CNT is manufactured by general arc discharge method, vapor growth method, laser evaporization method etc..It is it is, for example, possible to use logical
The CNT for crossing following vapor growth methods to manufacture, using the catalyst for including the metals such as Co, Mg in the vapor growth method, and will
Include CO (carbon monoxide), H2Gas as raw material.In addition, CNT can not only use tubulose, but also can also use logical
It crosses heating etc. and changes shape.
Pectination base material 12 is formed by the elastomer with flexibility and buffering.In this embodiment, pectination base material 12
It is formed by such as thermoplastic elastomer (TPE).More specifically, as thermoplastic elastomer (TPE), polyurethane-type thermoplastic elastomer can be enumerated
(TPU) etc..
Pectination base material 12 can make the arbitrary size measured suitable for E.E.G.For example, support portion 14 can have 10~15mm
The length of length d2 of width d1,10~20mm degree and the thickness shown in Fig. 2 of 2.0~3.0mm degree of degree
d3.For example, broach 16 can have the width d5 of length d4 and 0.5~1.5mm degree of 15~30mm degree.In such case
Under, the interval d6 between adjacent broach 16 for example can be 1.0~2.0mm degree.Preferably, the front end of multiple broach 16
16b has the circular shape in no corner.The quantity of broach 16 is unrestricted in pectination base material 12, and can be according to support portion
14 and the size of 16 grade of broach suitably set.
As described above, in the present embodiment, E.E.G measurement electrode 10 is by having the broach including multiple broach 16 to arrange
17 pectination base material 12 and the structure composition at least formed at 16 one side of multiple broach along broach row 17.Pectination base material
12 are made of elastomer, and structure is made of multiple nano-carbon materials.Due to pectination base material 12 and structure be it is nonmetallic, because
This present embodiment E.E.G measurement in electrode 10 not include metal parts.
2. manufacturing method
Then, illustrate the manufacturing method of E.E.G measurement electrode 10.E.E.G measurement electrode 10 can be included by manufacture
The dispersion liquid of CNT, and use the dispersion liquid in pectination base material 12 along at least one side of multiple broach 16 of broach row 17
(hereinafter referred to as scheduled one side) forms structure to manufacture.
Before dispersion liquid is manufactured, CNT is pre-processed using mixed acid.As mixed acid, such as nitre can be used
Acid and the 1 of sulfuric acid：1 mixed solvent.CNT is added in the mixed solvent, is then stirred, then irradiates ultrasonic wave, thus
CNT is made to detach and disperse.Later, it is filtered under diminished pressure, takes out CNT, and CNT surface is neutralized using ammonium hydroxide etc..Then pure water is used
After washing surface, it is dried to obtain powdered CNT.
The powdered CNT pre-processed as described above is added in solvent so that its concentration reaches such as 0.01 weight
% is measured, then irradiating ultrasonic wave disperses CNT, obtains dispersion liquid.As solvent, n,N-Dimethylformamide can be used
(DMF), various alcohol etc..Additive that such as dispersant, surfactant, adhesive are appropriate can be added in the dispersion liquid simultaneously
It uses.When this additive is added in dispersion liquid, it is stronger to obtain that these additives can coat the fiber surface of CNT
Adhesion, but may interfere with the intrinsic electric conductivity of CNT.In order to ensure higher electric conductivity, preferably with without upper
The dispersion liquid of additive is stated to form the structure with CNT reticular structures, and the structure is fixed on pectination base material 12
On.
Then, the pectination base material 12 being made of elastomer is immersed in the dispersion liquid.As what is be made of elastomer
Pectination base material 12, such as can use and preliminary dimension is cut by the comb that resin is formed by commercially available.
In the dispersion liquid of dipping pectination base material 12 without the additives such as adhesive in the case of, by act on CNT and
Van der Waals force between pectination base material 12, being formed in at least one side of multiple broach 16 along broach row 17 has CNT nets
The structure of shape structure, and further it is attached directly to the scheduled one side of pectination base material 12.In dipping pectination base material 12
Dispersion liquid in comprising adhesive when additives, other than the Van der Waals force, be also applied in the power of adhesive etc..At this
In the case of kind, scheduled one side that CNT will be more firmly attached to pectination base material 12.
When implementing to pre-process to the presumptive area on the surface of pectination base material 12 before dispersion liquid is impregnated in, CNT can be excellent
First it is attached to the scheduled one side of pectination base material 12.It for example, can be to multiple combs along broach row 17 in pectination base material 12
The one side of tooth 16 implements surface treatment, CNT to be promoted to be attached to the one side.
After CNT is attached to the surface, by lifting pectination base material 12 from dispersion liquid and being dried, so as to make
CNT adheres to and is fixed on the surface of pectination base material 12.In this way, along multiple broach 16 of broach row 17 in pectination base material 12
At least one side forms the structure of reticular structure being connected to each other with CNT.It, can by repeating dipping and drying process
To obtain the structure of required thickness.
As described above, when pectination base material 12 is impregnated in dispersion liquid, CNT be attached directly in pectination base material 12 along
At least one side of multiple broach 16 of broach row 17, to form structure.Therefore, pectination base material 12 can be readily formed at
Scheduled one side form the E.E.G of structure and measure with electrode 10.
The E.E.G measurement electrode 10 of present embodiment can be by being mounted on headband by multiple E.E.G measurement electrodes 10
Or on head-shield, so that scalp contact surface 18 is contacted with scalp, so as to be used as headset equipment.It is included in this to wear
Multiple E.E.G measurement electrodes 10 in formula equipment are not necessarily to all be identically shaped and sized, can also be as needed
Arbitrarily change its shapes and sizes.
3. functions and effects
In E.E.G measurement formed as described above in electrode 10, multiple broach 16 are from the row of support portion 14 1 prominent with shape
Into broach row 17.One side along multiple broach 16 of broach row 17 becomes scalp contact surface 18.It is used E.E.G is used to measure
In the case of electrode 10, scalp contact surface 18 is made to be inserted into broach row 17 to the end from the front end 16b of multiple broach 16 along scalp
In hair.Beginning hair is scratched by multiple broach 16, scalp contact surface 18 can contact scalp to avoid hair.
The scalp contact surface 18 of E.E.G measurement electrode 10 is the one side for being formed with the structure including multiple CNT,
Its surface is formed with conductive path.In the case where using the E.E.G measurement electrode 10 of present embodiment, scalp and conductive path
Diameter contacts.Ensure in this way in the case of without using conductive paste E.E.G measurement electrode 10 and subject head it
Between conducting so that contact impedance can be reduced to extremely low level.As a result, E.E.G measurement electrode 10 can accurately detect
Faint electric signal from head.
In addition, the pectination base material 12 with multiple broach 16 is made of elastomer, there are flexibility and buffering.Even if edge
It the head of the one side contact subject of multiple broach 16 of broach row 17 and applies pressure, subject will not feel not relax
Clothes.The E.E.G measurement electrode 10 of present embodiment can mitigate the burden of subject.
In the present embodiment, structure exposes on the surface of pectination base material 12 and forms the net that multiple CNT are connected to each other
Shape structure.The structure of E.E.G measurement electrode 10 can play the electric conductivity as function intrinsic CNT as a result,.Do not having
The state of intervening binder agent etc., will not in the case that multiple CNT are connected to each other directly and form the structure with reticular structure
Damage the intrinsic electric conductivity of CNT.Therefore, more preferably as E.E.G measurement electrode 10.
Structure is formed in pectination base material 12 along at least one side of multiple broach 16 of broach row 17.By with this
Kind mode forms structure, and conductive path is formed as exposing on the surface of pectination base material 12.With existing inside pectination base material 12
The situation of conductive path is compared, and can efficiently transmit the E.E.G of measurement.
In the structure, CNT is directly connected to form network without the use of adhesive etc., and is fixed in pectination base
Material 12.Due to not using adhesive etc. when forming structure by CNT and the structure being fixed on pectination base material 12, remove
Have other than good electric conductivity, also maintain the flexibility and buffering of pectination base material 12.Therefore, E.E.G measurement electrode
10 have flexibility and buffering, therefore can mitigate the burden of subject on the whole.Since the structure is present in pectination base
The surface of material 12, therefore can minimize the usage amount of CNT, so as to reduce manufacture cost.
Also, the E.E.G measurement of present embodiment is included with electrode 10 by the pectination base material 12 of elastomer and in pectination base material
The structure being made of nano-carbon material of 12 scheduled one side.Due to being free of metal parts, even if pacifying on head
Pass through X ray computer tomoscan (CT in the case of the E.E.G measurement electrode 10 for filling present embodiment：Computed
) or NMR imaging method (MRI Tomography：Magnetic Resonance Imaging) image information is obtained,
It can prevent the generation of pseudomorphism.Therefore, E.E.G measurement with electrode 10 can be obtained and be believed by the image of X ray CT, MRI etc. simultaneously
Breath and the E.E.G for passing through brain wave electrode.
In addition, due to being free of metal parts, E.E.G measurement electrode 10 also can be used in the subject of metal allergy.
The E.E.G measurement electrode 10 of present embodiment can be disposable, therefore health aspect is also excellent.As by elastomer
The pectination base material 12 of composition is cut into appropriate size in the case of use by commercially available by the comb that resin is formed, and can make brain
Wave measurement is excellent with the production of electrode 10, and can reduce manufacture cost.
4. variation
The present invention is not limited to the above embodiments, can suitably change in the range of the purport of the present invention.
As pectination base material 12, the molding formed using the arbitrary elastomer with flexibility and buffering can be used
Body.In this case, it is, for example, possible to use the elastomers such as other thermoplastic elastomer (TPE)s, resin, rubber are as raw material.Pass through
Using arbitrary elastomer as raw material, the comb with arbitrary dimension and arbitrary shape can be manufactured for example, by injection moulding
Shape base material 12.
As other thermoplastic elastomer (TPE)s, for example, olefin hydrocarbons thermoplasticity elastic body (TPO), phenylethylene thermoplastic
Property elastomer, esters thermoplastic elastomer (TPE) (TPC), polyamide-type thermoplastic elastomer (TPAE) and polyvinyl chloride analog thermoplastic
Elastomer (TPVC) etc..
As resin, for example, acrylonitrile-styrene (AS) resin, acrylonitrile-butadiene (ABS) resin, ring
Oxygen resin, tetrafluoroethylene-ethylene copolymer (ETFE), tetrafluoraoethylene-hexafluoropropylene copolymer (FEP), hexafluoropropene propylene-second
Alkene copolymer (EFEP), Kynoar (PVDF), polychlorotrifluoroethylene (PCTFE), chlorotrifluoroethylene-ethylene copolymer
(ECTFE), polycaprolactam (nylon 6), polyhexamethylene adipamide (nylon66 fiber), nylon 46 (nylon 46), the poly- last of the ten Heavenly stems
Two acyl hexamethylene diamines (nylon 610), nylon 612 (nylon 612), poly-lauramide (nylon 12), nylon 11
(nylon 11), poly- hexamethylene terephthalamide (nylon 6T), polyxylene adipamide (nylon XD6), poly- paraphenylene terephthalamide
Nonamethylene diamine (nylon 9 T), poly- paraphenylene terephthalamide's hendecane diamines (nylon 11 T), nylon 1010 (nylon 1010), poly- ten
Two acyl decamethylene diamine (Nylon 1012) of dioxane, polyamide-based elastomer (TPA), PA polybutyleneterephthalate (PBT), poly- naphthalenedicarboxylic acid
Butanediol ester (PBN), makrolon (PC), linear low density polyethylene (LLDPE), surpasses polyethylene naphthalate (PEN)
Low density polyethylene (LDPE), low density polyethylene (LDPE) (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE) (HDPE), crosslinking are poly-
Ethylene, vinyl-vinyl acetate copolymer (EVA), ethylene-vinyl alcohol copolymer (EVOH), butylene glycol-ethenol copolymer
(BVOH), polyvinyl alcohol (PVA), polybutene (PB), polyurethane elastomer (TPU), polyester elastomer (TPC), olefines
Elastomer (TPO), styrenic elastomer (TPS), Noryl (MODIFIED PP E), liquid crystal polymer (LCP), cycloolefin are common
Polymers (COC), polyether-ketone (PEK), polyglycolic acid (PGA), polyarylate (PAR), polymethylpentene (PMP), polyether-ether-ketone
(PEEK), polyether sulfone (PES), polyethylene terephthalate (PET), phenolic resin (PF), tetrafluoroethylene-perfluoro alkyl second
Alkenyl ether copolymer (PFA), polyimides (PI), polyetherimide (PEI), acrylic resin (PMMA), poly- acetal
(POM), polypropylene (PP), polyphenylene sulfide (PPS), polystyrene (PS), polysulfones (PSU), polytetrafluoroethylene (PTFE) (PTFE) and polychlorostyrene
Ethylene (PVC) etc..
As rubber, for example, natural rubber (NR), ethylene-propylene rubber (EPM, EPDM), neoprene
(CR), butyl rubber (IIR), polyurethane rubber (U), silicon rubber (VMQ, FVMQ), acrylic rubber (ACM), epoxychloropropane
Rubber (ECO), fluorubber (FKM, FEPM, FFKM), nitrile rubber (NBR), hydrogenated nitrile-butadiene rubber (H-NBR), haloflex
(CPE), chlorosulfonated polyethylene (CSM), butadiene rubber (BR) and SBR styrene butadiene rubbers (SBR) etc..
As long as in flexibility and buffering range without damage, as needed, the support portion 14 and comb of pectination base material 12
Tooth 16 can use different materials by multicolour forming, insert molding etc..
Also, pectination base material 12 can be porous by expanded material, timber, the cork with resiliency such as polyurathamc etc.
Material, make linear material by various fibers, fiber is weaved or is woven after the material that is solidified to form or non-knit
Material is formed.As long as in short, can multiple broach 16 for being provided projectingly in a row of shape and with elasticity, and scheduled one
Side can form the material of structure, it is possible to be suitably used, and be not limited to above-mentioned material.
In particular, in the case where using fibrous material, porous material, expanded material etc. as pectination base material 12, CNT fiber
Easily it is wrapped in the bumps on surface.It in this case, can also be in pectination base material 12 along comb even if without using adhesive
The fiber majority that at least one side of multiple broach 16 of denture 17 forms each CNT is wound and the structure with CNT reticular structures
Body, while can be directly anchored on pectination base material 12.As a result, as described above, the brain that electric conductivity further improves can be obtained
Wave measurement electrode 10.
The multiple broach 16 being provided projectingly from the row of pectination base material 12 1 not necessarily must be from the midway direction of length direction
The side opposite with scalp contact surface 18 tilts.Can be different from shape shown in Fig. 2, from the cardinal extremity 14a of support portion 14 to comb
The part of the front end 16b of tooth 16 can be point-blank.Multiple broach 16 can have uniform from cardinal extremity 14a to front end 16b
Thickness.Length d4, the width d5 of broach 16 and interval d6 can be according to the type of elastomer to be used, the width of support portion 14
Degree d1 and length d2 etc. are suitably set.
The support portion 14 of pectination base material 12 is not necessarily required to the rectangular shape limited by width d1 and length d2.As long as
It can keep intrinsic elasticity and scalp contact surface 18 is not interfered to be contacted with scalp, support portion 14 and multiple broach 16 can have
There is arbitrary shape.
In the case of without the concern for artifact, as long as in the model for the flexibility and buffering for not damaging pectination base material 12
Enclose, the part of E.E.G measurement electrode 10 can also including metallic plate etc. metal parts.For example, do not have on the surface of support portion 14
It, can be while ensuring to be connected with scalp contact surface 18 by conducting wire, in the support portion in the case of being formed with structure
14 surface setting metallic plate.By setting metallic plate, electric signal can be easily transmitted, and measurement can be further improved
Precision.
In said embodiment, by the way that CNT is directly anchored in pectination base material 12 along multiple combs of broach row 17
At least one side of tooth 16 fixes CNT in pectination base material 12 and forms the structure exposed on the surface of pectination base material 12, but
CNT can also be fixed on pectination base material 12 by fiber base material.CNT is fixed on pectination base material 12 by fiber base material for example can be with
It CNT coated papers 20 is attached to the scheduled one side of pectination base material 12 realizes by as shown in Figure 3.CNT coated papers 20
It is made of fiber base material 22 and the structure 24 that CNT is attached to the surface of the fiber base material 22 and is formed.
As fiber base material 22, for example, half paper and paper of low fibre density, Tang's paper, volume cloth, woven fabric and nonwoven
Cloth etc..Type, the size (diameter, length, density etc.) of the fiber of composition fiber base material 22 can be according to attachment CNT coated papers 20
Material, the size of pectination base material 12 etc. properly select.
CNT coated papers 20 can be by the way that fiber base material 22 to be immersed in the dispersion liquid comprising above-mentioned CNT and be dried
To manufacture.The step that repeats to impregnate and dry to form the structure with predetermined thickness on the surface of fiber base material 22
24, obtain CNT coated papers 20.By the way that a surface of CNT coated papers 20 is attached in pectination base material 12 along broach row 17
The one side of multiple broach 16 measures use so as to more easily manufacture the E.E.G of conductive scalp contact surface 18
Electrode 10.
As described above, in E.E.G measurement in electrode 10, by including the structure of multiple CNT, on pectination base material 12
Form conductive path.The conductive path being made of such structure is not limited to the surface of pectination base material 12, can also be formed in
The inside of pectination base material 12.Even in this case, structure is formed in the side of multiple broach 16 along broach row 17
Face.
The E.E.G measurement electrode in the inside of pectination base material 12 with conductive path can be by by the elasticity of electric conductivity
It is body formed to manufacture for scheduled shape.The elastomer of electric conductivity can such as be made by being mixed in the elastomer for being used as base material
It is manufactured for the CNT of nano-carbon material.As base material, above-mentioned arbitrary elastomer can be used.If the combined amount of CNT
(concentration) is 1~15 weight % degree of elastomer, then can not damage the elasticity of elastomer and form E.E.G measurement electrode
Required conductive path.
When CNT is mixed with the concentration more than 15 weight %, the intrinsic characteristic of elastomer as base material may be by
Damage.The concentration of CNT is preferably more than the 3 weight % of elastomer, more preferably more than 7 weight %, most preferably 10 weight % with
On.
For example, with biaxial extruder etc. by elastomer and CNT melting mixings, mixed raw material is manufactured.The condition of melting mixing
It can be properly selected according to type of elastomer etc..Make the mixed raw material after melting mixing on comminutor by manufacturing
Grain.Particle can be made into general size.For example, a diameter of 2~3mm degree of particle, length is 2~3mm degree.
Obtained particle is shaped to scheduled comb-like form by injection (mo(u)lding) machine, obtains E.E.G measurement electrode.This
The E.E.G measurement of sample manufacture is properly termed as the pectination base material being made of the elastomer of electric conductivity with electrode.Injection molding condition can
It is properly selected with type, target size of pectination base material according to elastomer etc..
In the E.E.G measurement electrode formed in the pectination base material by being made of the elastomer of electric conductivity, in internal also shape
Into the conductive path based on structure.Thereby, it is possible at least one side of the multiple broach arranged along broach is made electric conductivity
Scalp contact surface.Since such E.E.G measurement electrode also has the intrinsic elasticity of elastomer, can obtain with it is upper
State identical effect.
In said embodiment, CNT is used as the nano-carbon material for forming structure, but graphite can also be used
Alkene and be not limited to CNT.Graphene is the nano-carbon material for having as CNT high conductivity.In addition to CNT is replaced by graphene
In addition, by method same as described above, by graphene be fixed on pectination base material 12 surface or inside to form structure, from
And the scalp contact surface of electric conductivity can be set in the one side of multiple broach 16 along broach row 17.
5. embodiment
Hereinafter, the embodiment that will illustrate E.E.G measurement electrode, but the present invention is not limited only to following embodiment.
[embodiment 1]
In the present embodiment, CNT coated papers are pasted onto on pectination base material, thus manufacture E.E.G measurement electrode, and adjust
Look into its electrical characteristics.CNT coated papers are made of fiber base material and the structure that CNT is attached to the fibrous substrate surface and is formed.
Therefore, in the E.E.G measurement electrode of embodiment 1, there is the structure of reticular structure that multiple CNT are connected to each other in pectination
Expose on the surface of base material.
<The manufacture of CNT dispersion>
CNT is manufactured by using general hot CVD method of the iron as catalyst.Taking-up mixed acid and ultrasonic separation
It with the CNT of dispersion, is neutralized with ammonium hydroxide, uses pure water.Finally, it is dried in an oven to obtain powdered CNT.
Powdered CNT is dispersed in DMF to manufacture CNT dispersion.A concentration of 0.01 weight of CNT in dispersion liquid
Measure %.Here, CNT is disperseed without the use of adhesive by ultrasonic irradiation.
<The manufacture of CNT coated papers>
Commercially available half paper is cut to predetermine sizes, and be immersed in the CNT dispersion of above-mentioned manufacture as fiber base material,
Then it is dried.The distance between test terminal is set as 1cm degree and is pressed against dried half paper surface, and
Measure impedance value.When the impedance value of measurement is not up to predetermined value, repeats to impregnate and similarly measure impedance after drying
Value.It is manufactured by repeating to impregnate and dry until the impedance value on dried half paper surface reaches predetermined value such as Fig. 3 institutes
The CNT coated papers 20 shown.
The SEM photograph on the surface of obtained CNT coated papers 20 is as shown in Figure 4.In Fig. 4 A (multiplying powers：50 times) in, confirm
It forms wrapped around one another as the fiber of half paper of fiber base material 22.In Fig. 4 B (multiplying powers：10000 times) in, it can be confirmed multiple micro-
Small CNT is attached to the fiber surface of fiber base material 22.The structure that multiple CNT formation are made of the reticular structure being connected to each other
24。
In the present embodiment, due to not using the additives such as adhesive, CNT is direct by Van der Waals force each other
Contact, is able to maintain that the intrinsic high conductivity of CNT.In addition, in CNT coated papers 20, will not due to additive fiber base material
22 intrinsic flexibilities are damaged.Since CNT coated papers 20 keep the flexibility intrinsic as half paper of fiber base material 22, energy
The scheduled one side of enough broach 16 that CNT coated papers 20 are pasted onto to pectination base material 12.
<The manufacture of E.E.G measurement electrode>
As pectination base material 12, it is 5 to prepare commercially available plastic comb cutting into broach number.
The CNT coated papers 20 of above-mentioned manufacture are matched along the surface of the broach row 17 of pectination base material 12 and are cut, are used in combination
Commercially available double faced adhesive tape is pasted onto a side of multiple broach 16 along broach row 17.Between adjacent broach 16, make
CNT coated papers 20 are cut with scissors and are detached, and obtain the E.E.G measurement electrode 10 of embodiment 1.
Fig. 5 shows the side view of the E.E.G measurement electrode 10 of embodiment 1.In E.E.G measurement in electrode 10, multiple combs
Tooth 16 is provided projectingly from support portion 14 and a row is arranged on the direction orthogonal with paper, so as to form broach row 17.CNT is applied
Cover the one side for multiple broach 16 that paper 20 is pasted onto along the broach row 17.It is pasted onto multiple broach 16 along broach row 17
One side CNT coated papers 20 surface become scalp contact surface 18.
<The measurement of electrode contact impedance>
Measurement electrod assembly is manufactured, and measure forehead and hair portion using the E.E.G measurement electrode 10 of embodiment 1
Electrode contact impedance.In the measurements, the wireless bioelectrical signals measuring device (polymer manufactured by Miyuki Giken has been used
It is miniature) and active electrode (disc electrode).
Specifically, as shown in fig. 6, the active electrode 26 for being connected with conducting wire 32 is mounted on E.E.G using terminal pressing plate 28
18 side of scalp bearing surface with electrode 10 is measured, manufactures measurement electrod assembly 30.By making scalp contact surface 18 and forehead
Or the contact of hair portion carrys out measuring electrode contact impedance.For frons, by being dropped before measuring by applying abrasive gel
Low contact impedance is measured.The electrode contact impedance of forehead is 40~60k Ω, and the electrode contact impedance in hair portion is also
40~60k Ω also become low electrode contact impedance in the hair portion for having obstruction.
In order to compare, using only active electrode 26, forehead and the electrode contact impedance in hair portion are measured in an identical manner
(comparative example 1).Forehead obtains 40~60k Ω degree, this is almost the same with the situation of embodiment 1.But hair portion is up to 300k
The value of more than Ω.Since comparative example 1 is only active electrode 26, hair cannot be avoided.It was found that because of head in active electrode 26
Hair becomes obstruction and electrode contact impedance increases, and for hair portion, can not accurately measure E.E.G.
Embodiment 1 E.E.G measurement in electrode 10, multiple broach 16 reach while the hair for scratching beginning hair portion
Scalp, and scalp contact surface 18 is avoided hair and is contacted with scalp.Due to scalp contact surface 18 exist have multiple CNT that
The structure of the reticular structure of this connection, therefore sufficient electric conductivity can be ensured in the case of no conductive paste.It is using
In the case that the E.E.G of embodiment 1 is measured with electrode 10, low impedance value can be obtained even if hair portion, it can be accurately
Measure E.E.G.
[embodiment 2]
In the present embodiment, the E.E.G measurement electrode being made of the pectination base material of electric conductivity is manufactured, and investigates its electricity
Characteristic.The pectination base material of electric conductivity is that CNT is kneaded product, is to be molded the mixing material that CNT is kneaded in the elastomer as base material
For obtained from pectination.Therefore, the E.E.G measurement of embodiment 2 with electrode in addition to the surface of pectination base material also inside have it is more
The structure for the reticular structure that a CNT is connected to each other.
<Relationship between CNT concentration and bulk resistivity>
CNT of the manufacture comprising various concentration CNT is kneaded the sample of product, and investigates the pass between CNT concentration and bulk resistivity
System.In the perparation of specimen, first, CNT and base material are carried out by melting mixing by biaxial extruder, thus manufactured a diameter of
The CNT of 0.3cm is kneaded stock.As CNT, in the same manner as the above embodiments 1, using by using iron as the general of catalyst
The obtained CNT of thermal cvd.CNT can be pre-processed using mixed acid, but pretreatment is not required.As base material,
It uses polyamide-type thermoplastic elastomer (Pebax 2533, manufactured by Arkema).A concentration of four kinds of CNT, respectively 1.9
Weight %, 3.3 weight %, 3.9 weight % and 11.6 weight %.
Obtained CNT mixing stocks are cut into the sample that length is 10cm.4 terminal probes of the both ends of sample are clamped,
And measure resistance Rs using LCR measuring instruments (manufacture of IM3590, Zhi Electric Co., Ltd).Using the resistance Rs (Ω) of measurement,
Sectional area A (0.152πcm2) and length L (10cm), pass through the bulk resistivity ρ (Ω of following mathematical expression (1) calculating each sample
cm)。
ρ=(RsA)/L mathematical expressions (1)
For each CNT concentration, the average value of the bulk resistivity ρ of 3 samples is obtained, and the results are shown in the chart of Fig. 3
In.As CNT concentration increases, the bulk resistivity ρ that CNT is kneaded product sample is reduced.When bulk resistivity ρ is the 100 following journeys of Ω cm
When spending, E.E.G measurement electrode can be suitable as.Thermoplastic polyamide elastomer using CNT and as base material manufactures E.E.G
In the case of measurement electrode, it is thus identified that CNT concentration is preferably more than 7 weight % more preferably more than 10 weight %.Also,
The range of appropriate CNT concentration can according to CNT, base material type and change.
<The manufacture of E.E.G measurement electrode>
Using CNT similar to the above and base material, CNT is manufactured by method same as described above and is kneaded stock.The concentration of CNT
12 weight % are made.CNT is kneaded a diameter of 0.3cm of stock.Obtained CNT mixing stocks have made length by comminutor and have been about
The CNT compounded resin particles of 2mm.As illustrated in fig. 1 and 2, by the way that CNT compounded resin particles are molded into pectination.In this way, manufacture
The E.E.G measurement electrode of 3 embodiments 2 being made of the pectination base material of electric conductivity.
The E.E.G measurement of embodiment 2 by the use of electrode due to the use of polyamide-type thermoplastic elastomer as base material, therefore have
Flexibility and buffering.In the E.E.G measurement electrode of embodiment 2, width d1, length d2 and the thickness d 3 of support portion 14
Respectively 11mm, 13.8mm and 2.5mm, length d4, the width d5 and interval d6 of broach 16 are respectively 17.3mm, 0.7mm
And 1.2mm.
<The measurement of impedance>
The impedance of the E.E.G measurement electrode of embodiment 2 is measured using LCR measuring instruments.It is used specifically, E.E.G is measured
The both ends of electrode are clamped with 4 terminal probes, and measure the impedance of 10Hz.The distance between probe is 35mm.The measurement of 3 samples
The average value of value is 170 Ω.The impedance of E.E.G measurement electrode is preferably the following degree of 10K Ω, more preferably the following journeys of 1K Ω
Degree.The E.E.G of embodiment 2 measures electricity consumption and has the impedance for being suitable as E.E.G measurement electrode.
In order to compare, formed body has been manufactured using electric conductivity nylon, and has passed through same procedure and measures impedance (comparative example
2).As electric conductivity nylon, (Arkema's systems of Pebax 5533SN 70 used as Thermoplastic polyamide elastomer
Make), the E.E.G that 3 and embodiment 2 are manufactured by being injection moulded measures the formed body that electricity consumption has identical size and shape.Than
Average impedance compared with the electric conductivity nylon molding body of example 2 is 100k Ω.
Due to embodiment 2 E.E.G measurement by the use of electrode by being kneaded the electric conductivity for having CNT in the elastomer as base material
Pectination base material is formed, therefore other than the surface of pectination base material, is also formed with being connected to each other by multiple CNT in inside netted
The structure of structure.Due to not only forming on surface but also also the pectination base material of this structure in inside integrally there is conductive path
Diameter, therefore excellent electric conductivity.
In the case of the E.E.G measurement electrode of embodiment 2 that the pectination base material by such electric conductivity is used to form,
Scalp is contacted with conductive path.In the same manner as the E.E.G measurement electrode of embodiment 1, the E.E.G measurement electrode of embodiment 2 exists
It can be ensured that the conducting between E.E.G measurement electrode and subject in the case of without using conductive paste, contact impedance can be dropped
As low as a relatively low level.As a result, the E.E.G measurement electrode of embodiment 2 can be accurately detected from the faint of head
Electric signal.
<The measurement of electrode contact impedance>
Measurement electrod assembly is manufactured with electrode using the E.E.G measurement of embodiment 2, passes through method same as Example 1
Measure forehead and the electrode contact impedance in hair portion.In the E.E.G measurement electrode of embodiment 2, the electrode contact impedance of forehead
For 20k Ω, the electrode contact impedance in hair portion is 50~150k Ω.
In order to compare, using only active electrode 26, forehead and the electrode contact impedance in hair portion are measured in an identical manner
(comparative example 3).For forehead, the result same as Example 2 of 20k Ω is obtained.But the impedance in hair portion is up to more than 300k Ω
Value.Since comparative example 3 is only active electrode 26, hair, which becomes, to be hindered and increases, so as to cannot accurately measure hair
The E.E.G in portion.
Also, by will combine to manufacture with active electrode with aforementioned 2 same electric conductivity nylon molding body of comparative example
Electrod assembly (comparative example 4).As hereinbefore, when measuring the electrode contact impedance of comparative example 4 in forehead and hair portion, forehead and
The electrode contact impedance in hair portion is also roughly the same with the electrode contact impedance of the comparative example 3 only including active electrode.
The impedance ratio for having been acknowledged by electric conductivity nylon molding body is kneaded the E.E.G measurement use for the embodiment 2 that product are formed by CNT
Big 3 stages (comparative example 2) of electrode.Electric conductivity nylon molding body cannot ensure sufficient electric conductivity.Therefore, even if by conductive
Property nylon molding body when being combined with active electrode, it is similary with the situation for only including active electrode, it is difficult to accurately to measure E.E.G.
In the E.E.G measurement electrode of embodiment 2, there is CNT due to being kneaded in the elastomer as base material,
Sufficient electric conductivity is can also ensure that in inside other than surface.In the E.E.G measurement electrode for using this embodiment 2
In electrod assembly, it can be obtained than in the past lower impedance value even if hair portion, it being capable of accurately measure E.E.G.And
And have flexibility and buffering since the E.E.G of embodiment 2 measures electricity consumption, it can also be mitigated subject's burden
Effect.
Attached drawing marks explanation
10：E.E.G measurement electrode
12：Pectination base material
14：Support portion
14a：Cardinal extremity
16：Broach
16a：Cardinal extremity
16b：Front end
17：Broach arranges
18：Scalp contact surface
Claims (9)
1. a kind of E.E.G measurement electrode, including the pectination base material being made of elastomer and the knot for being formed in the pectination base material
Structure body, which is characterized in that
The pectination base material includes support portion and broach arranges, and the broach arranges more by being provided projectingly with arranging from the support portion one
A broach is formed,
The structure is formed in the one side of the multiple broach arranged along the broach,
The structure includes multiple nano-carbon materials, the reticular structure that the formation of the multiple nano-carbon material is connected to each other it is same
When be fixed on the pectination base material.
2. E.E.G measurement electrode according to claim 1, which is characterized in that
The multiple broach is tilted from the midway of length direction towards the side opposite with the one side.
3. E.E.G measurement electrode according to claim 1 or 2, which is characterized in that
The multiple nano-carbon material is fixed on the pectination by being directly anchored to the one side of the multiple broach
Base material.
4. E.E.G measurement electrode according to claim 1 or 2, which is characterized in that
The multiple nano-carbon material is by being fixed on the fiber base material for the one side for being pasted onto the multiple broach and solid
It is scheduled on the pectination base material.
5. E.E.G measurement electrode according to claim 1 or 2, which is characterized in that
The pectination base material is the pectination base material for the electric conductivity for including the multiple nano-carbon material, and the structure is formed in institute
State the inside of pectination base material.
6. E.E.G measurement electrode according to claim 5, which is characterized in that
The bulk resistivity of the pectination base material is below 100 Ω cm.
7. E.E.G measurement electrode according to any one of claim 1 to 6, which is characterized in that the multiple nano-sized carbon
Material is selected from carbon nanotube and graphene.
8. E.E.G measurement electrode according to any one of claim 1 to 7, which is characterized in that the elastomer is from tree
It is selected in fat, thermoplastic elastomer (TPE) and rubber.
9. E.E.G measurement electrode according to any one of claim 1 to 8, which is characterized in that without metal parts.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2015-202204 | 2015-10-13 | ||
| JP2015202204 | 2015-10-13 | ||
| JP2016-201052 | 2016-10-12 | ||
| JP2016201052A JP2017074369A (en) | 2015-10-13 | 2016-10-12 | Electrode for brain wave measurement |
| PCT/JP2016/080311 WO2017065195A1 (en) | 2015-10-13 | 2016-10-13 | Electrode for brain wave measurement |
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| CN108135525A true CN108135525A (en) | 2018-06-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112043264A (en) * | 2020-10-10 | 2020-12-08 | 江苏集萃脑机融合智能技术研究所有限公司 | Self-adhesion fixed scalp electroencephalogram electrode and electroencephalogram signal acquisition method |
| WO2021099382A1 (en) * | 2019-11-20 | 2021-05-27 | Nextmind Sas | Electrode for electroencephalography |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107569214A (en) * | 2017-09-21 | 2018-01-12 | 武汉资联虹康科技股份有限公司 | A kind of sucked type fibre-optical probe |
| JP7350257B2 (en) * | 2019-09-19 | 2023-09-26 | ニッタ株式会社 | Headgear for brain wave measurement |
| CN115666384A (en) | 2020-07-03 | 2023-01-31 | Nok株式会社 | Bioelectrode |
| WO2022176559A1 (en) | 2021-02-18 | 2022-08-25 | Nok株式会社 | Bioelectrode |
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2016
- 2016-10-12 JP JP2016201052A patent/JP2017074369A/en active Pending
- 2016-10-13 CN CN201680058264.XA patent/CN108135525A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021099382A1 (en) * | 2019-11-20 | 2021-05-27 | Nextmind Sas | Electrode for electroencephalography |
| CN112043264A (en) * | 2020-10-10 | 2020-12-08 | 江苏集萃脑机融合智能技术研究所有限公司 | Self-adhesion fixed scalp electroencephalogram electrode and electroencephalogram signal acquisition method |
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