CN115161995A - Conductive fabric material with single-walled carbon nanotubes uniformly coated on commercial cotton bandage and preparation method and application thereof - Google Patents

Conductive fabric material with single-walled carbon nanotubes uniformly coated on commercial cotton bandage and preparation method and application thereof Download PDF

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CN115161995A
CN115161995A CN202110834583.8A CN202110834583A CN115161995A CN 115161995 A CN115161995 A CN 115161995A CN 202110834583 A CN202110834583 A CN 202110834583A CN 115161995 A CN115161995 A CN 115161995A
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swcnt
conductive
conductive fabric
cotton bandage
bandage
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CN115161995B (en
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林惠娟
张小培
姜婷婷
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Nanjing Tech University
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Nanjing Tech University
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
    • D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/0026—Apparatus for manufacturing conducting or semi-conducting layers, e.g. deposition of metal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/02—Natural fibres, other than mineral fibres
    • D06M2101/04—Vegetal fibres
    • D06M2101/06—Vegetal fibres cellulosic

Abstract

The invention relates to a commercial Cotton Bandage (CB) solution method deposited single-walled carbon nanotube (SWCNT) conductive fabric material and a preparation method and application thereof. Adding the SWCNT into a Sodium Dodecyl Benzene Sulfonate (SDBS) solution serving as a surfactant, fully stirring and ultrasonically dispersing to obtain a SWCNT dispersion solution, and preparing the conductive fabric uniformly coated with the SWCNT by a solution soaking method. The multilayer braided structure of the CB is beneficial to maximally adsorbing the SWCNT, wherein when the conductive bandage is soaked for three times, the conductive bandage has good mechanical flexibility, a wider strain response range, a low strain detection limit, good circulation stability, washability and the like; when soaked for five times, the conductive bandage has good conductivity, high stretchability, excellent mechanical stretching stability and the like. The method for preparing the conductive fabric material by the solution soaking method has the advantages of simple preparation process, low production cost, easy industrial scale and the like, and can be widely applied to flexible multidirectional strain sensors and elastic stretchable conductors.

Description

Conductive fabric material with single-walled carbon nanotubes uniformly coated on commercial cotton bandage and preparation method and application thereof
Technical Field
The invention relates to a conductive fabric material of a single-walled carbon nanotube-coated cotton bandage and preparation and application thereof, belonging to the technical field of functional nano materials.
Background
The intelligent wearable field is a cross research field integrating multiple disciplines and categories, and is concerned by students in various fields in recent years. Recently, the conductive fiber has a wide application prospect in the field of intelligent wearable devices due to its excellent mechanical properties, outstanding electrical and optical functional characteristics, and becomes a research hotspot. The fabric is a material which is composed of fibers with a layered structure and has special properties of high mechanical flexibility, strong air permeability, light weight, low bending rigidity, easy processing and the like. With the continuous development of flexible electronic technology, the traditional large-volume or planar structure cannot adapt to serious and complex deformation. In contrast, textile constructions offer unique and promising advantages. In order to meet the higher requirements of light weight, low cost, high flexibility, high air permeability, comfort, washability, suitability for complex deformation of various parts of a human body and the like, people vigorously develop strain sensors based on conductive fabrics.
The performance of a strain sensor depends mainly on the electromechanical properties of its conductive material. Due to the advantages of good flexibility, electrical conductivity, light weight, chemical stability, easiness in chemical functionalization and the like, the carbon nano tube can effectively meet the application requirements of flexible wearable electronic products. At present, a plurality of reports exist on the application of a conductive material prepared by combining a carbon material and a fabric to a sensor, but the preparation method and the material stability have a space for further improvement. In the literature (Mengyun Yang, junjie Pan, anchang Xu, lei Luo, deshan Cheng, guangming Cai, jinfeng Wang, bin Tang, and Xungai Wang, polymers 2018,10, 568-580), a soaking method is adopted to prepare the CNT elastic knitted cotton fabric material, and the strain detection range of the conductive fabric material prepared by the method is 100%, however, the sensitivity of the conductive fabric material is only 1.82 under the condition of large strain and the strain direction is single. In the literature (Javad Foroughi, geoffrey m.spines, shaded Aziz, azadeh Mirabedini, ali jeiranikhaneh, gordon g.wallace, mikhail e.kozlov, and Ray h.baughman, ACS Nano 2016,10, 9129-9135), it is mentioned that the strain detection range of this highly elastic conductive knitted fabric prepared by the integrated knitting process is 100%, and its sensitivity is only 0.4 very small and only unidirectional strain. In the literature (Jeng-Hun Lee, jungmo Kim, dan Liu, fengmei Guo, xi Shen, qingbin Zheng, seokwood Jeon, and Jang-Kyo Kim, advanced Functional Materials 2019,29, 1901623-1901634), an electrospinning method is adopted to prepare an anisotropic carbon nanofiber film, the anisotropy of the carbon nanofiber film distinguishes the direction and the strength of strain, and the anisotropic carbon nanofiber film can be used for multidirectional strain, the sensitivity of the fiber film is up to 180, but the stretchability is only 30%. Therefore, it is necessary to realize a sensor based on novel fabric material, high stretchability of structural design, high sensitivity and multi-directionality.
In order to improve the sensing performance of the strain sensor and simplify the preparation method and facilitate the operation, the patent is based on the multilayer woven structure of the cotton bandage and strong van der Waals force and other interactions between the multilayer woven structure and the carbon nano tubes, the commercial cotton bandage is successfully and uniformly coated with SWCNT by adopting a solution soaking method to prepare the conductive fabric material, and meanwhile, the polymer encapsulation is avoided, so that the conductive fabric material has the advantages of fabric comfort, good linear strain response and the like.
Disclosure of Invention
The invention aims to provide a nano conductive fabric material which is prepared by a simple preparation method, can realize a wide strain range and high stable cycle performance and is suitable for industrial large-scale production through a solution soaking method for depositing a SWCNT-coated cotton bandage, aiming at the defects of the conventional fabric-based strain sensor conductive material. The technical problem to be solved by the invention is that: a method for preparing a flexible conductive fabric material by depositing and coating SWCNT on a commercial cotton bandage through a solution soaking method comprises the following steps: taking a proper amount of a surfactant Sodium Dodecyl Benzene Sulfonate (SDBS) to purchase in Shanghai Aladdin Biotechnology, co., ltd, adding a certain amount of deionized water, and mixing and stirring uniformly; then adding a certain proportion of single-walled carbon nanotubes (SWCNT) purchased from Nanjing Xiancheng nanomaterial science and technology Limited company, and ultrasonically dispersing at normal temperature to prepare SWCNT dispersion liquid; and (3) soaking the commercial cotton bandage in the dispersion liquid for 3 to 5 times and 3 to 8min by regulating and controlling the soaking time to obtain the flexible conductive fabric with different contents of SWCNT uniformly coated on the cotton bandage.
Preferably, the soaking time is 5min, and the soaking times are 3 times or 5 times.
Preferably, the commercial cotton bandage is a woven structure formed by twisting fibers into a yarn.
Preferably, the SWCNT solution is a uniform dispersion, and the preparation method thereof is as follows: and (3) filling 0.3g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.03g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
Preferably, the SWCNT solution is transferred to a petri dish having a diameter of 12cm, a cotton bandage having a size of 6cm x 6cm is placed in the petri dish, soaked for 5min at normal temperature, then washed with deionized water, dried for 5h in a vacuum drying oven at 60 ℃, and repeatedly soaked for 3 or 5 times to prepare the conductive fabric according to the above steps.
Preferably, the mass ratio of SDBS to SWCNT used is 10; in preparing SWCNT dispersions, the required sonication temperature as well as the stirring temperature are controlled at room temperature conditions.
The invention solves the technical problem that another technical scheme is provided: a commercial cotton bandage prepared according to any of the above methods was deposited over SWCNT-coated conductive fabric material.
The invention solves the technical problem that another technical scheme is provided: the application of the commercial cotton bandage deposition coating SWCNT conductive fabric material can be effectively applied to flexible strain sensors or stretchable conductors.
Preferably, the SWCNT is coated on the cotton bandage to obtain the flexible conductive cotton fabric, and the SWCNT deposited on the cotton bandage has different amounts through different soaking times; after soaking for three times, the SWCNT is uniformly coated on the surface of the fabric, so that the fabric has good mechanical flexibility, a wide strain range, a low strain detection limit and good circulation stability, and is suitable for flexible wearable electronic equipment; after soaking for four times, the conductivity is continuously enhanced; after being soaked for five times, the content of the SWCNT coated by the conductive cotton bandage reaches a saturated state, has good conductivity, high stretchability and excellent mechanical stretching stability, and is suitable for flexible stretchable conductors.
Preferably, the material is used for a preparation method of a flexible strain sensor or a stretchable conductor, and comprises the following steps: a. drying the flexible conductive fabric material which is soaked for three or five times and uniformly coated with the SWCNTs with the size of 6cm to 6cm in a vacuum drying oven at 60 ℃ for more than or equal to 5h;
b. cutting the conductive fabric material into a rectangular shape of 1.7cm x 0.6cm with uniform size, connecting two ends with copper wires by using conductive silver adhesive as an electrode, drying in a vacuum drying oven at 60 ℃ for 3h, further coating a layer of transparent adhesive on the conductive silver adhesive to reinforce the electrode, and continuously drying in the vacuum drying oven at 60 ℃ for 3h. Therefore, the flexible strain sensor can be obtained, the mechanical property test is carried out on a universal material testing machine (Shanghai wingspan precision instruments, inc. HY-0350), a current signal is collected by a digital current source (Keithley 2450), and drawing and analysis are carried out by origin software after data collection is finished.
The prepared conductive fabric is used as a strain sensor to be tested, the voltage is 3V, and the 5000-time circulation stability is good.
And the size of the sensor in the step b is 1.7cm in length and 0.6cm in width.
Has the beneficial effects that:
compared with other methods for preparing the carbon material fabric structure material, the method for preparing the conductive fabric is simple, the adopted solution soaking method is suitable for large-scale production, no harmful substance is generated in the preparation reaction process, and the green chemical concept is met. The prepared conductive fabric has a wider strain detection range (0-150%), higher sensitivity (6) and good cycling stability (5000 cycles), and is superior to most of the SWCNT-coated fabric conductive materials reported at present; meanwhile, multi-directional testing and application can be realized due to the multi-layer structure of the fabric.
The invention relates to design, preparation and application of a commercial Cotton Bandage (CB) solution method for depositing a single-walled carbon nanotube (SWCNT) conductive fabric material. Adding the SWCNT into a Sodium Dodecyl Benzene Sulfonate (SDBS) solution serving as a surfactant, fully stirring and mixing at room temperature, and performing ultrasonic dispersion to obtain a uniform SWCNT dispersion liquid. The CB is immersed in the dispersion liquid, and the conductive fabric uniformly coated with the SWCNT can be prepared through a solution immersion method. The strong interaction between SDBS and SWCNTs can make SWCNTs uniformly dispersed and coated on the surface of the CB, becoming part of the CB. The multi-layer braided structure of the CB is beneficial to maximally adsorbing the SWCNT, and meanwhile, resistance response in different strain directions can be realized. When the conductive bandage is soaked for three times, the conductive bandage has good mechanical flexibility, a wider strain response range, a low strain detection limit, good circulation stability, washability and the like; when soaked for five times, the conductive bandage has good conductivity, high stretchability, excellent mechanical stretching stability and the like. The method for preparing the conductive fabric material by the solution soaking method has the advantages of simple preparation process, low production cost, easy industrial scale and the like, and can be widely applied to flexible multidirectional strain sensors and elastic stretchable conductors.
The unique twisting and layering structure of the commercial cotton bandage increases the strain detection range, has the advantages of light weight, strong air permeability and the like, and can effectively improve the strain circulation stability of the conductive fabric due to the conductive path provided by the SWCNT and the strong action force of the SWCNT and the cotton bandage. The woven layered structure is beneficial to coating the active material on the fabric, can realize the wearing of the electronic fabric under the condition without any supporting substrate, is green and environment-friendly, has simple preparation process, and is suitable for large-scale production and application of the flexible strain sensor.
The flexible conductive fabric can obtain different deposition amounts of SWCNT on commercial cotton bandage through different soaking times. After soaking once or twice, the SWCNT is not uniformly coated and has poor conductivity; after soaking for three times, the SWCNT is uniformly coated and has good conductivity, and is suitable for flexible electronic materials; after soaking for four times, the conductivity is continuously enhanced; after soaking for five times, the content of SWCNT coated by the conductive cotton bandage reaches a saturated state, and the conductive cotton bandage is suitable for flexible stretchable conductors. The patent is demonstrated in combination with examples to determine the best preparation condition of the strain sensor when soaked for three times, wherein the conductive fabric has a wider strain sensing range, multidirectional response and high cycle stability; meanwhile, the soaking time of five times is the optimal preparation condition of the stretchable conductor, and the conductive fabric still has excellent conductivity under different deformations and good mechanical stretching stability.
The cotton bandage prepared by the experiment is deposited and coated with SWCNT for three times, the soaking time is 5 min/time, the prepared conductive fabric material can bear larger deformation, and after the test, the prepared conductive fabric material is applied to a sensor to obtain relatively higher sensitivity, the strain range can reach 150%, the relative resistance change is large, the circulation stability is good, and meanwhile, the conductive fabric material has multi-directionality, can be used for detecting subtle and violent multi-directional movement of human beings, and shows great potential in the application of wearable electronic products.
The preparation method is basically the same as that in example 3, except that the performance test of the conductive fabric material prepared by depositing and coating the SWCNTs in a commercial cotton bandage (soaking three times, the time is changed into 3min and 8 min) is not much different from the performance test of the conductive fabric material prepared in example 3 (soaking three times, the time is 5 min), and the conductive fabric material can bear larger deformation, and after the test, the strain range obtained after the conductive fabric material is applied to a sensor is wider, the cycle stability is good, the sensitivity fluctuation range is small, and the relative resistance change is not much different.
The cotton bandage prepared by the experiment is deposited and coated for five times, the soaking time is 5 min/time, the prepared conductive fabric has high conductivity (resistance: 12 omega), excellent flexibility (deformation such as stretching, bending and twisting), strong stretching property (strain range: 150%), and excellent mechanical stretching stability, and the stretchable conductor can be used in the intelligent fields such as wearable equipment due to the superelasticity.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a scanning electron microscope image of a pure cotton bandage according to example 1 of the present invention;
FIG. 2 is a scanning electron microscope image of SWCNT coated commercial cotton bandage deposition after three soaks in example 3 of the present invention;
FIG. 3 is a Raman image of SWCNT-coated commercial cotton bandage deposition after three soaks in example 3 of the present invention;
FIG. 4 is a graph of strain sensor performance for SWCNT-coated cotton bandages of example 1 of the present invention at different soaking times, where the relative resistance change Δ R/R 0 (ΔR＝R-R 0 R is instantaneous resistance, R 0 Initial resistance), sensitivity (GF = (Δ R/R) 0 )/ε，ε＝L-L 0 /L 0 L is the length after stretching, L 0 Initial length);
FIG. 5 is the resistance response change of SWCNT coated conductive fabric material deposited by commercial cotton bandage under different strain conditions at the same frequency after three immersions in example 3 of the present invention;
FIG. 6 is a stability test of a commercial cotton bandage deposited SWCNT coated strain sensor after three soaks in example 3 of the present invention;
FIG. 7 is a multi-directional test of SWCNT-coated conductive material deposited on commercial cotton bandages after three immersions in example 3 of the present invention (left view: vertical elastic fabric direction; right view: 45 degree included angle of net-woven structure);
FIG. 8 is a diagram showing response signals for monitoring different fingers of a human body in a bending state according to embodiment 3 of the present invention;
FIG. 9 shows a stretchable conductor test of SWCNT coated conductive material deposited by commercial cotton bandage under deformation state of stretching, bending, twisting, etc. after five soakings in example 5 of the present invention;
FIG. 10 is a test of stretchability and mechanical tensile stability of a stretchable conductor of SWCNT-coated conductive material deposited with a commercial cotton bandage after five soaks in example 5 of the present invention;
Detailed Description
The technical solution of the invention is further illustrated below with reference to examples, which are not to be construed as limiting the technical solution.
1. Preparation of SWCNT solution
Taking a proper amount of surface active agent Sodium Dodecyl Benzene Sulfonate (SDBS), adding into a certain amount of deionized water, and mixing and stirring uniformly. Then adding a certain proportion of single-walled carbon nanotubes (SWCNT), mixing and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a SWCNT dispersion liquid.
2. Application of SWCNT (single-walled carbon nanotube) coated cotton bandage in preparation of conductive material of sensor
Transferring the SWCNT dispersion to a surface dish with a diameter of 12cm, placing a cotton bandage with a size of 6cm x 6cm into the surface dish, soaking for 5min at normal temperature, washing with deionized water, drying for 5h in a vacuum drying oven at 60 ℃, and repeating the operation three times.
3. Application of SWCNT (single-walled carbon nanotube) coated cotton bandage in preparation of stretchable conductor conductive material
Transferring the SWCNT dispersion solution into a surface dish with the diameter of 12cm, placing a cotton bandage with the size of 6cm to 6cm into the surface dish, soaking for 5min at normal temperature, washing with deionized water, drying for 5h in a vacuum drying oven at 60 ℃, and repeating the operation for five times.
4. Application of SWCNT (single-walled carbon nanotube) coated cotton bandage in preparation of sensor or stretchable conductor
Cutting the conductive fabric material with scissors into a rectangular shape of 1.7cm x 0.6cm with uniform size, connecting two ends of the conductive fabric material with copper wires by using conductive silver adhesive as an electrode, drying the conductive fabric material in a vacuum drying oven at 60 ℃ for 3h, further coating a layer of transparent adhesive on the conductive silver adhesive to reinforce the electrode, and drying the conductive silver adhesive in the vacuum drying oven at 60 ℃ for 3h.
Example 1
And (3) filling 0.3g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.03g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
Transferring the SWCNT solution into a surface dish with a diameter of 12cm, placing a cotton bandage with a size of 6cm x 6cm into the surface dish, soaking for 5min at normal temperature, washing with deionized water, and drying in a vacuum drying oven at 60 deg.C for 5h.
The method comprises the steps of cutting a conductive fabric into the same length (the length is 1.7cm, the width is 0.6 cm) according to a woven hierarchical structure, connecting two ends of the conductive fabric with a copper wire through conductive silver adhesive to serve as electrodes, drying the conductive fabric, then coating a layer of transparent adhesive to fix the electrodes, carrying out mechanical property test on a universal material testing machine (Shanghai weighing and wing precision instruments, inc. HY-0350), collecting current signals through a current source (Keithley 2450), and carrying out drawing and analysis through origin software after data collection is completed.
The sensor shows extremely poor conductivity and extremely small strain detection range, and a conductive path fails in the strain process and is in an open circuit state.
Example 2
And (3) filling 0.3g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.03g of SWCNT into the beaker, performing ultrasonic treatment at normal temperature for 8h, and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
Transferring the SWCNT solution into a surface dish with a diameter of 12cm, placing a cotton bandage with a size of 6cm x 6cm into the surface dish, soaking for 5min at normal temperature, washing with deionized water, and drying in a vacuum drying oven at 60 deg.C for 5h. And (4) repeatedly soaking for two times according to the steps to prepare the conductive fabric.
The method comprises the steps of cutting a conductive fabric into the same length (the length is 1.7cm, the width is 0.6 cm) according to a woven hierarchical structure, connecting two ends of the conductive fabric with a copper wire through conductive silver adhesive to serve as electrodes, coating a layer of transparent adhesive to fix the electrodes after drying, carrying out mechanical property test on a universal material testing machine (Shanghai Heifen precision instruments, inc. HY-0350), collecting current signals through a current source (Keithley 2450), and carrying out drawing and analysis through origin software after data collection is completed.
The sensor exhibits a very small strain sensing range and the conductive path is unstable during strain.
Example 3
And (3) filling 0.3g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.03g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
Transferring the SWCNT solution into a surface dish with the diameter of 12cm, placing a cotton bandage with the size of 6cm to 6cm into the surface dish, soaking for 5min at normal temperature, washing with deionized water, and drying in a vacuum drying oven at 60 ℃ for 5h. And (4) repeatedly soaking for three times according to the steps to prepare the conductive fabric.
Cutting the conductive fabric into the same length (the length is 1.7cm, the width is 0.6 cm) according to a woven hierarchical structure, connecting two ends of the conductive fabric with a copper wire through conductive silver adhesive to be used as an electrode, coating a layer of transparent adhesive to fix the electrode after drying, carrying out mechanical property test on the electrode, collecting current signals by a current source, and carrying out drawing and analysis through origin software after data collection is finished.
The sensor showed excellent performances such as a wide detection range (0-150%), excellent cycling stability (5000 cycles) and high sensitivity (GF = 6). Meanwhile, multi-direction test can be carried out, and the strain in the direction vertical to the elastic fabric can reach 5 percent; the strain range of the net weaving structure in the 45-degree direction can reach 110%.
Example 4
And (3) filling 0.3g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.03g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
Transferring the SWCNT solution into a surface dish with the diameter of 12cm, placing a cotton bandage with the size of 6cm to 6cm into the surface dish, soaking for 5min at normal temperature, washing with deionized water, and drying in a vacuum drying oven at 60 ℃ for 5h. And (4) repeatedly soaking for four times according to the steps to prepare the conductive fabric.
Cutting the conductive fabric into the same length (the length is 1.7cm, the width is 0.6 cm) according to a woven hierarchical structure, connecting two ends of the conductive fabric with a copper wire through conductive silver adhesive to be used as an electrode, coating a layer of transparent adhesive to fix the electrode after drying, carrying out mechanical property test on the electrode, collecting current signals by a current source, and carrying out drawing and analysis through origin software after data collection is finished.
The sensor exhibits a large strain sensing range, with a stable conductive path during strain, but a small resistance response.
Example 5
And (3) filling 0.3g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.03g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
Transferring the SWCNT solution into a surface dish with a diameter of 12cm, placing a cotton bandage with a size of 6cm x 6cm into the surface dish, soaking for 5min at normal temperature, washing with deionized water, and drying in a vacuum drying oven at 60 deg.C for 5h. The conductive fabric was prepared by repeatedly soaking five times according to the above steps.
Cutting the conductive fabric into the same length (the length is 1.7cm, the width is 0.6 cm) according to a woven hierarchical structure, connecting two ends of the conductive fabric with a copper wire through conductive silver adhesive to be used as an electrode, coating a layer of transparent adhesive to fix the electrode after drying, carrying out mechanical property test on the electrode, collecting current signals by a current source, and carrying out drawing and analysis through origin software after data collection is finished.
The conductive fabric reaches a saturated state, a conductive path is stable in a strain process, the stretchable conductor shows a large detection range (0-150%), the brightness of the LED lamp does not change in a deformation (stretching, bending and twisting) process, the stretchability and the mechanical stretching stability are excellent (the stretchable conductor can be circularly stabilized for 5000 times when the strain is 10%,30%,50%,70% and 90%), and the conductive fabric can be used for the stretchable conductor.
Example 6
And (3) filling 0.3g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.03g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
Transferring the SWCNT solution into a surface dish with the diameter of 12cm, placing a cotton bandage with the size of 6cm to 6cm into the surface dish, soaking for 1min at normal temperature, washing with deionized water, and drying in a vacuum drying oven at 60 ℃ for 5h. And (4) repeatedly soaking for three times according to the steps to prepare the conductive fabric.
Cutting the conductive fabric into the same length (the length is 1.7cm, the width is 0.6 cm) according to a woven hierarchical structure, connecting two ends of the conductive fabric with a copper wire through conductive silver adhesive to be used as an electrode, coating a layer of transparent adhesive to fix the electrode after drying, carrying out mechanical property test on the electrode, collecting current signals by a current source, and carrying out drawing and analysis through origin software after data collection is finished.
The sensor shows a small strain detection range, and the conductive path fails during the strain process, resulting in an open circuit state.
Example 7
And (3) filling 0.3g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.03g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
Transferring the SWCNT solution into a surface dish with a diameter of 12cm, placing a cotton bandage with a size of 6cm x 6cm into the surface dish, soaking at normal temperature for 10min, washing with deionized water, and drying in a vacuum drying oven at 60 deg.C for 5h. And (4) repeatedly soaking for three times according to the steps to prepare the conductive fabric.
Cutting the conductive fabric into the same length (the length is 1.7cm, the width is 0.6 cm) according to a woven hierarchical structure, connecting two ends of the conductive fabric with a copper wire through conductive silver adhesive to be used as electrodes, coating a layer of transparent adhesive to fix the electrodes after drying, testing the mechanical properties of the electrodes, collecting current signals through a current source, and drawing and analyzing through origin software after data collection is completed.
The sensor exhibits a large strain sensing range, a stable conductive path during strain, yet a small resistance response.
Example 8
And (3) filling 0.3g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.03g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
Transferring the SWCNT solution into a surface dish with a diameter of 12cm, placing a cotton bandage with a size of 6cm x 6cm into the surface dish, soaking for 1min at normal temperature, washing with deionized water, and drying in a vacuum drying oven at 60 deg.C for 5h. The conductive fabric was prepared by repeatedly soaking five times according to the above steps.
Cutting the conductive fabric into the same length (the length is 1.7cm, the width is 0.6 cm) according to a woven hierarchical structure, connecting two ends of the conductive fabric with a copper wire through conductive silver adhesive to be used as an electrode, coating a layer of transparent adhesive to fix the electrode after drying, carrying out mechanical property test on the electrode, collecting current signals by a current source, and carrying out drawing and analysis through origin software after data collection is finished.
The stretchable conductor shows a large strain detection range, the conductive path is stable during the strain, however, the conductivity is poor, the conductive fabric does not reach the saturation state, and the conductive fabric is not applicable to the stretchable conductor.
Example 9
And (3) filling 0.3g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.03g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
The SWCNT solution was transferred to a 12cm diameter watch glass, and a cotton bandage with a size of 6cm x 6cm was placed in the watch glass, soaked at normal temperature for 10min, then washed with deionized water, and dried in a vacuum drying oven at 60 ℃ for 5h. The conductive fabric was prepared by repeatedly soaking five times according to the above steps.
Cutting the conductive fabric into the same length (the length is 1.7cm, the width is 0.6 cm) according to a woven hierarchical structure, connecting two ends of the conductive fabric with a copper wire through conductive silver adhesive to be used as electrodes, coating a layer of transparent adhesive to fix the electrodes after drying, testing the mechanical properties of the electrodes, collecting current signals through a current source, and drawing and analyzing through origin software after data collection is completed.
The stretchable conductor shows a large strain detection range, the conductivity is good, the conductive fabric reaches an oversaturated state, but the conductive material can fall off during the test process to cause the instability of a conductive path during the strain process, and the conductive fabric cannot be used for the stretchable conductor.
Example 10
And (3) filling 0.3g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.03g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
Transferring the SWCNT solution into a surface dish with a diameter of 12cm, placing a cotton bandage with a size of 6cm x 6cm into the surface dish, soaking for 3min at normal temperature, washing with deionized water, and drying in a vacuum drying oven at 60 deg.C for 5h. And (4) repeatedly soaking for three times according to the steps to prepare the conductive fabric.
Cutting the conductive fabric into the same length (the length is 1.7cm, the width is 0.6 cm) according to a woven hierarchical structure, connecting two ends of the conductive fabric with a copper wire through conductive silver adhesive to be used as an electrode, coating a layer of transparent adhesive to fix the electrode after drying, carrying out mechanical property test on the electrode, collecting current signals by a current source, and carrying out drawing and analysis through origin software after data collection is finished.
The sensor can bear larger deformation, and after the sensor is tested, the strain range obtained after the sensor is applied is smaller, and the cycling stability is better.
Example 11
And (3) filling 0.3g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.03g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
Transferring the SWCNT solution into a surface dish with a diameter of 12cm, placing a cotton bandage with a size of 6cm x 6cm into the surface dish, soaking for 8min at normal temperature, washing with deionized water, and drying in a vacuum drying oven at 60 deg.C for 5h. And (4) repeatedly soaking for three times according to the steps to prepare the conductive fabric.
Cutting the conductive fabric into the same length (the length is 1.7cm, the width is 0.6 cm) according to a woven hierarchical structure, connecting two ends of the conductive fabric with a copper wire through conductive silver adhesive to be used as an electrode, coating a layer of transparent adhesive to fix the electrode after drying, carrying out mechanical property test on the electrode, collecting current signals by a current source, and carrying out drawing and analysis through origin software after data collection is finished.
The sensor shows larger deformation, and the strain range obtained after the sensor is applied to the sensor is wider through testing and the cycling stability is good.
Example 12
And (3) filling 0.6g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.06g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform dispersion liquid of the SWCNT.
Transferring the SWCNT solution into a surface dish with a diameter of 12cm, placing a cotton bandage with a size of 6cm x 6cm into the surface dish, soaking for 5min at normal temperature, washing with deionized water, and drying in a vacuum drying oven at 60 deg.C for 5h. And (4) repeatedly soaking for three times according to the steps to prepare the conductive fabric.
Cutting the conductive fabric into the same length (the length is 1.7cm, the width is 0.6 cm) according to a woven hierarchical structure, connecting two ends of the conductive fabric with a copper wire through conductive silver adhesive to be used as an electrode, coating a layer of transparent adhesive to fix the electrode after drying, carrying out mechanical property test on the electrode, collecting current signals by a current source, and carrying out drawing and analysis through origin software after data collection is finished.
The conductive fabric has a large strain detection range, good conductivity and small resistance response change in a strain process.
Example 12
And (3) filling 0.6g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.06g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
Transferring the SWCNT solution into a surface dish with a diameter of 12cm, placing a cotton bandage with a size of 6cm x 6cm into the surface dish, soaking for 5min at normal temperature, washing with deionized water, and drying in a vacuum drying oven at 60 deg.C for 5h. The conductive fabric was prepared by repeatedly soaking five times according to the above steps.
Cutting the conductive fabric into the same length (the length is 1.7cm, the width is 0.6 cm) according to a woven hierarchical structure, connecting two ends of the conductive fabric with a copper wire through conductive silver adhesive to be used as an electrode, coating a layer of transparent adhesive to fix the electrode after drying, carrying out mechanical property test on the electrode, collecting current signals by a current source, and carrying out drawing and analysis through origin software after data collection is finished.
The stretchable conductor shows a large strain detection range, high conductivity and the conductive fabric reaches an oversaturated state, but the conductive material can fall off in a strain test to cause instability of a conductive path in a strain process, and the conductive fabric of the stretchable conductor cannot be used.
The conductive fabric material prepared by depositing and coating SWCNT on a commercial cotton bandage in example 3 can reach a strain detection range of 150%, has high sensitivity (GF = 6) and 5000-time cycle stability, can be tested in multiple directions, is simple in preparation process, and is more suitable for large-scale production.
The conductive fabric material prepared by depositing SWCNTs with a commercial cotton bandage in example 5 can be used as a stretch conductor up to 150% stretch, 5000 cycles stable, and can be applied to various deformations (stretch, bend, twist, etc.).
The preparation method is basically the same as that in example 3, except that the performance test of the conductive fabric material prepared by depositing and coating the SWCNTs in a commercial cotton bandage (soaking three times, the time is changed into 3min and 8 min) is not much different from the performance test of the conductive fabric material prepared in example 3 (soaking three times, the time is 5 min), and the conductive fabric material can bear larger deformation, and after the test, the strain range obtained after the conductive fabric material is applied to a sensor is wider, the cycle stability is good, the sensitivity fluctuation range is small, and the relative resistance change is not much different.
The invention is not limited to the specific technical solutions described in the above embodiments, and all technical solutions formed by equivalent substitutions are within the scope of the claims of the invention.

Claims (10)

1. A method for preparing a flexible conductive fabric material by depositing and coating SWCNT on a commercial cotton bandage through a solution soaking method is characterized by comprising the following steps: the method comprises the following steps: taking a proper amount of a surface active agent SDBS, namely sodium dodecyl benzene sulfonate, adding into a certain amount of deionized water, and mixing and stirring uniformly; then adding a certain proportion of single-walled carbon nanotube SWCNT, and performing ultrasonic dispersion at normal temperature to prepare SWCNT dispersion liquid; and (3) soaking a commercial cotton bandage into the dispersion liquid for 3 or 5 times by regulating and controlling the soaking time for 3-8min to obtain the flexible conductive fabric with different contents of SWCNT uniformly coated on the cotton bandage.
2. The method of claim 1 for preparing a conductive fabric by coating SWCNT with a commercial cotton bandage, which comprises the following steps: the soaking time is 5min, and the soaking times are 3 times or 5 times.
3. The method of preparing a conductive fabric coated with SWCNT by using a commercial cotton bandage as claimed in claim 1, wherein the method comprises the following steps: the commercial cotton bandage is formed by twisting fibers into yarns and forming a braided structure.
4. The method of claim 1 for preparing conductive fabric by depositing SWCNT-coated commercial cotton bandage, comprising: the SWCNT dispersion is a uniform dispersion, and the preparation method comprises the following steps: and (3) filling 0.3g of SDBS into a beaker, adding 60mL of deionized water, stirring for 30min under magnetic stirring, adding 0.03g of SWCNT into the beaker, and ultrasonically dispersing for 8h at normal temperature and stirring for 24h to obtain a uniform SWCNT dispersion liquid.
5. The method of claim 1 for preparing a conductive fabric by depositing SWCNT-coated commercial cotton bandage, wherein the method comprises: transferring the SWCNT dispersion liquid to a surface dish with the diameter of 12cm, putting a cotton bandage with the size of 6cm to 6cm into the surface dish, soaking for 5min at normal temperature, then washing with deionized water, drying for 5h in a vacuum drying oven at 60 ℃, and repeatedly soaking for 3 times or 5 times according to the steps to prepare the conductive fabric.
6. The method of claim 1 for preparing a conductive fabric by depositing SWCNT-coated commercial cotton bandage, wherein the method comprises: the mass ratio of the SDBS to the SWCNT used was 10; in preparing the SWCNT dispersion, the required sonication temperature and stirring temperature were controlled at room temperature.
7. A commercial cotton bandage prepared according to any of claims 1-6 is deposited with SWCNT-coated conductive textile material.
8. The use of a commercial cotton bandage to deposit SWCNT-coated conductive textile material according to claim 7, wherein: can be effectively applied to flexible strain sensors or stretchable conductors.
9. The use of commercial cotton bandage to deposit SWCNT-coated conductive fabric as claimed in claim 8, wherein: the SWCNT coats the cotton bandage to obtain the flexible conductive cotton fabric, and the SWCNT deposited on the cotton bandage has different amounts through different soaking times; after soaking for three times, the SWCNT is uniformly coated on the surface of the fabric, so that the fabric has good mechanical flexibility, a wide strain range, a low strain detection limit and good circulation stability, and is suitable for flexible wearable electronic equipment; after being soaked for five times, the SWCNT content coated by the conductive cotton bandage reaches a saturated state, has good conductivity, high stretchability and excellent mechanical stretching stability, and is suitable for flexible stretchable conductors.
10. The use of a commercial cotton bandage to deposit SWCNT-coated conductive textile material of claim 8, wherein: the preparation method of the material used for the flexible strain sensor or the stretchable conductor comprises the following steps:
a. drying the flexible conductive fabric material which is soaked for three or five times and uniformly coated with the SWCNTs with the size of 6cm to 6cm in a vacuum drying oven at 60 ℃ for more than or equal to 5h;
b. cutting conductive fabric material into 1.7cm x 0.6cm rectangle with uniform size, connecting two ends with copper wire as electrode by conductive silver adhesive, drying in 60 deg.C vacuum drying oven for 3h, further coating a layer of transparent adhesive on the conductive silver adhesive to reinforce electrode, and drying in 60 deg.C vacuum drying oven for 3h. Therefore, the flexible strain sensor can be obtained, the mechanical property test is carried out on a universal material testing machine (Shanghai wingspan precision instruments, inc. HY-0350), a current signal is collected by a digital current source (Keithley 2450), and drawing and analysis are carried out by origin software after data collection is finished.
CN202110834583.8A 2021-07-23 2021-07-23 Conductive fabric material for single-walled carbon nanotube uniformly coated commercial cotton bandage and preparation method and application thereof Active CN115161995B (en)

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