CN102207575B - Polarizing element and manufacturing method thereof - Google Patents
Polarizing element and manufacturing method thereof Download PDFInfo
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- CN102207575B CN102207575B CN2011101748124A CN201110174812A CN102207575B CN 102207575 B CN102207575 B CN 102207575B CN 2011101748124 A CN2011101748124 A CN 2011101748124A CN 201110174812 A CN201110174812 A CN 201110174812A CN 102207575 B CN102207575 B CN 102207575B
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Abstract
The invention relates to an optical polarizing element, which comprises a supporting body and a polarizing film arranged on the supporting body. The polarizing film is at least one layer of carbon nanometer tube film; the carbon nanometer tube film has a continuous integral structure with the width of 1 to 10 cm, which is formed by combining a plurality of carbon nanometer tubes through a Van der Waals' force; and the carbon nanometer tubes in the at least one layer of carbon nanometer tube film are arrayed in a preferred orientation way along the same direction. Because the carbon nanometer tubes have high-temperature thermal stability, and have a uniform absorption characteristic for electromagnetic waves with various wavelengths, the polarizing element has the uniform absorption characteristic for the electromagnetic waves with the various wavelengths, and has a wide application range. The invention also relates to a manufacturing method for the optical polarizing element.
Description
This case is that the applicant is 200710073765.8 at the application number of application on March 30th, 2007, and name is called dividing an application of " polarization element and preparation method thereof ".
Technical field
The present invention relates to a kind of optical device and preparation method thereof, relate in particular to a kind of polarization element and preparation method thereof.
Background technology
Polarization element is a kind of important optical device, is widely used in sunglasses and the LCD.A kind of polarization element of widespread use now can absorb the light of a polarization state, and the light of another polarization state then passes through polarization element.This kind polarization element usually adopts a kind of like this method to make: the dichroism molecule be dissolved in or be absorbed in the polymer substance, as polyvinyl alcohol (PVA), and with the gained film with a direction stretching assortment dichroism molecule.At this moment, the dichroism molecule is lined up along draw direction is regular, forms a long-chain.In incident light wave, optical vibration direction is parallel to being absorbed of long-chain direction, perpendicular to seeing through of long-chain direction, so transmitted light becomes linearly polarized light.This kind polarization element also can be by producing the method for dichroism molecule absorption on the polymer film of uniaxial tension.
Since the manufacturing of this kind polarization element need be with the dichroism molecule in conjunction with high molecular polymer as light polarizing film, preparation process is comparatively complicated.And use high molecular polymer as the polarization element of light polarizing film after using a period of time more than 50 ℃, the polarizing coefficient of light polarizing film reduces, even loses the polarisation effect.And this type of polarization element is also higher to humidity requirement, in case work under bad environment, high humidity, polarization element will lose the polarisation effect.
In addition, general electromagnetic wave (as microwave, infrared light, visible light, ultraviolet light etc.) to a certain wave band of existing polarization element has good polarization property, and the polarization absorption characteristic of homogeneous can't be arranged the electromagnetic wave of various wavelength.
Therefore, necessaryly provide a kind of electromagnetic wave to various wavelength all to have polarization element of good polarization property and preparation method thereof, this polarization element preparation is simple, and also can have good polarisation effect in high temperature, high humidity environment.
Summary of the invention
A kind of polarization element, it comprises that a supporter and is arranged at the light polarizing film of this supporter, this light polarizing film is that one deck carbon nano-tube film or the multilayer carbon nanotube films that piles up are formed, the continuous films structure of described carbon nano-tube film for being formed to be arranged of preferred orient by a plurality of end to end carbon nano-tube bundles, this carbon nano-tube film.
A kind of polarization element, it comprises that a supporter and is arranged at the light polarizing film of this supporter, described light polarizing film is that 20 or 30 layers of carbon nano-tube film overlap formation, carbon nano-tube film in described 20 or 30 layers of carbon nano-tube film is a plurality of continuous films structures that formed to be arranged of preferred orient by the end to end carbon nano-tube bundle of Van der Waals force, and the width of this carbon nano-tube film is 1 centimetre to 10 centimetres.
A kind of polarization element, it comprises that a supporter and is arranged at the light polarizing film of this support, described light polarizing film is that a plurality of carbon nano-tube films do not have the gap side by side and are covered on the described supporter, the width of described supporter is greater than the width of described carbon nano-tube film, each carbon nano-tube film in described a plurality of carbon nano-tube film is for being 1 centimetre to 10 centimetres continuous films structure by a plurality of carbon nano-tube bundles by the join end to end width that forms of Van der Waals force, the excellent orientations of described a plurality of carbon nano-tube bundles.
Compared to prior art, described polarization element adopts multilayer carbon nanotube films as polarizing coating, because carbon nano-tube has the thermal stability of high temperature, the absorption characteristic that homogeneous is arranged for the electromagnetic wave of various wavelength, so polarization element of the present invention has the polarization absorption performance of homogeneous for the electromagnetic wave of various wavelength, has widely scope should be arranged.
Description of drawings
Fig. 1 is the structural representation of embodiment of the invention polarization element.
Fig. 2 is the preparation method's of embodiment of the invention polarization element process flow diagram.
Fig. 3 handles the stereoscan photograph of preceding polarization element for embodiment of the invention organic solvent.
Fig. 4 is the stereoscan photograph of the polarization element of embodiment of the invention organic solvent after handling.
Fig. 5 adopts the degree of polarization contrast synoptic diagram of polarization element under each wavelength of the carbon nano-tube film of the different numbers of plies for the embodiment of the invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
See also Fig. 1, the invention provides a kind of polarization element 10, this polarization element 10 comprises a supporter 12 and a carbon nano-tube film 14 by supporter 12 supports.This supporter 12 can be a fixed frame or a transparency carrier.This carbon nano-tube film 14 directly adheres to fixed frame or transparency carrier surface as light polarizing film.The multi-layer film structure that this carbon nano-tube film 14 can be one deck or piles up.Every layer of carbon nano-tube film 14 is the membrane structure of a plurality of end to end carbon nano-tube bundles to be arranged of preferred orient and to form.When this carbon nano-tube film 14 was multilayer, carbon nano-tube bundle aligned substantially in the same direction in this carbon nano-tube film 14.
The width of this carbon nano-tube film 14 can be 1cm～10cm in the embodiment of the invention, and the thickness of this carbon nano-tube film 14 is 0.01～100 micron.The polarization absorption performance of embodiment of the invention polarization element 10 is relevant with the number of plies of carbon nano-tube film 14, and carbon nano-tube film 14 numbers of plies are more many, and the polarization property of this polarization element 10 is more good.
Because near absolute black body, carbon nano-tube all has the absorption characteristic of homogeneous for the electromagnetic wave of various wavelength to carbon nano-tube, so polarization element of the present invention 10 also has the polarization absorption performance of homogeneous for the electromagnetic wave of various wavelength to absorption of electromagnetic wave.When light wave incident, the light that direction of vibration is parallel to the carbon nano-tube bundle length direction is absorbed, and sees through perpendicular to the luminous energy of carbon nano-tube bundle length direction, so transmitted light becomes linearly polarized light.
See also Fig. 2, the preparation method of embodiment of the invention polarization element 10 mainly comprises following step:
Step 1: a carbon nano pipe array is provided, and preferably, this array is super in-line arrangement carbon nano pipe array.
In the present embodiment, the preparation method of super in-line arrangement carbon nano pipe array adopts chemical vapour deposition technique, its concrete steps comprise: a smooth substrate (a) is provided, this substrate can be selected P type or N-type silicon base for use, or select for use the silicon base that is formed with oxide layer, present embodiment to be preferably and adopt 4 inches silicon base; (b) evenly form a catalyst layer at substrate surface, this catalyst layer material can be selected one of alloy of iron (Fe), cobalt (Co), nickel (Ni) or its combination in any for use; (c) the above-mentioned substrate that is formed with catalyst layer was annealed in 700～900 ℃ air about 30 minutes～90 minutes; (d) substrate that will handle places reacting furnace, is heated to 500～740 ℃ under the blanket gas environment, feeds carbon-source gas then and reacts about 5～30 minutes, and growth obtains super in-line arrangement carbon nano pipe array, and it highly is 200～400 microns.Should super in-line arrangement carbon nano-pipe array classify as a plurality of parallel to each other and perpendicular to the pure nano-carbon tube array of the carbon nano-tube formation of substrate grown.By above-mentioned control growth conditions, do not contain impurity substantially in this super in-line arrangement carbon nano pipe array, as agraphitic carbon or residual catalyst metal particles etc.Carbon nano-tube in this carbon nano pipe array closely contacts the formation array by Van der Waals force each other.
Carbon source gas can be selected the more active hydrocarbons of chemical property such as acetylene for use in the present embodiment, and blanket gas can be selected nitrogen, ammonia or inert gas for use.
Step 2: adopt a stretching tool from carbon nano pipe array, to pull and obtain at least one carbon nano-tube film.The preparation of this carbon nano-tube film specifically may further comprise the steps: (a) a plurality of carbon nano-tube segments of selected certain width from above-mentioned carbon nano pipe array, present embodiment are preferably and adopt the adhesive tape contact carbon nano pipe array with certain width to select a plurality of carbon nano-tube bundles of certain width; (b) be basically perpendicular to a plurality of these carbon nano-tube bundles of carbon nano pipe array direction of growth stretching with the certain speed edge, to form a continuous carbon nano-tube film.
In above-mentioned drawing process, these a plurality of carbon nano-tube bundles are when pulling force effect lower edge draw direction breaks away from substrate gradually, because Van der Waals force effect, should be drawn out continuously end to end with other carbon nano-tube bundles respectively by selected a plurality of carbon nano-tube bundles, thereby form a carbon nano-tube film.This carbon nano-tube film is the carbon nano-tube film with certain width that a plurality of carbon nano-tube bundles of being arranged of preferred orient join end to end and form.The orientation of carbon nano-tube is basically parallel to the draw direction of carbon nano-tube film in this carbon nano-tube film.
In the present embodiment, the width of this carbon nano-tube film is relevant with the size of the substrate that carbon nano pipe array is grown, and the length of this carbon nano-tube film is not limit, and can make according to the actual requirements.Adopt 4 inches the super in-line arrangement carbon nano pipe array of substrate grown in the present embodiment, the width of this carbon nano-tube film can be 1cm～10cm, and the thickness of this carbon nano-tube film is 0.01～100 micron.
Step 3 a: supporter is provided, above-mentioned carbon nano-tube film is adhered fixed in supporter along predetermined direction, thereby obtain polarization element.
In the present embodiment, this supporter can be a square metal fixed frame, is used for the fixed carbon nano-tube film, and its material is not limit, and the outer unnecessary carbon nano-tube film of fixed frame can directly be removed.
Because the carbon nano-tube in the super in-line arrangement carbon nano pipe array that provides in the present embodiment step 1 is very pure, and because the specific surface area of carbon nano-tube itself is very big, so this carbon nano-tube film itself has stronger viscosity.This carbon nano-tube film can utilize the viscosity of itself directly to adhere to fixed frame in the step 3, makes fixing by fixed frame of this carbon nano-tube film all around, and the center section of this carbon nano-tube film is unsettled.
In the present embodiment, this supporter also can be a transparency carrier.Above-mentioned first carbon nano-tube film can directly attach to the transparency carrier surface.
Those skilled in the art of the present technique should understand, the big I of this supporter determines according to actual demand, when the width of supporter during greater than the width of above-mentioned carbon nano-tube film, a plurality of above-mentioned carbon nano-tube films seamlessly can be covered side by side and stick on the supporter.
Be understandable that, in the step 3, multilayer carbon nanotube films can be adhered fixed in above-mentioned supporter along identical direction and obtain polarization element.
Closely be connected to form stable multilayer carbon nanotube films structure owing to Van der Waals force between this multilayer carbon nanotube films.The number of plies of this carbon nano-tube film is not limit, and specifically can prepare according to actual demand.
In addition, the polarization element of above-mentioned acquisition can further with an organic solvent be handled the carbon nano-tube film in the polarization element.
Can organic solvent be dropped in the whole carbon nano-tube film of carbon nano-tube film surface infiltration by test tube, perhaps, also the above-mentioned whole immersion of fixed frame that is formed with carbon nano-tube film can be filled in the container of organic solvent and soak into.This organic solvent is volatile organic solvent, as ethanol, methyl alcohol, acetone, ethylene dichloride or chloroform, and the preferred ethanol that adopts in the present embodiment.This carbon nano-tube film is after organic solvent soaks into processing, under the capillary effect of volatile organic solvent, parallel carbon nano-tube bundle in the carbon nano-tube film can part be assembled, therefore, this carbon nano-tube film surface volume after the processing is than little, inviscid, and have excellent mechanical intensity and toughness.Polarization element after the processing can be applied to macroscopical field more easily.
See also Fig. 3 and Fig. 4, with an organic solvent handle electron scanning micrograph (SEM) the contrast synoptic diagram of front and back for embodiment of the invention polarization element.Carbon nano-tube all aligns in the carbon nano-tube film of polarization element, between the adjacent carbons nano-tube film by the Van der Waals force combination.Further, after the carbon nano-tube film in the polarization element of above-mentioned acquisition with an organic solvent handled, under capillary effect, the carbon nano-tube in this carbon nano-tube film after the processing was assembled bunchy.This carbon nano-tube film surface volume after the processing is than little, and is inviscid, and has excellent mechanical intensity and toughness, therefore can be applied to macroscopical field more easily.
See also Fig. 5, polarization element of the present invention adopts 2 layers, 5 layers, 10 layers, 20 layers and 30 layers of carbon nano-tube film as polarizing coating respectively, because carbon nano-tube all has the absorption characteristic of homogeneous for the electromagnetic wave of various wavelength, so polarization element of the present invention also has the polarization absorption performance of homogeneous for the electromagnetic wave of various wavelength.Simultaneously, from Fig. 5, can obviously find out, when the carbon nano-tube film number of plies more after a little while, this polarization element has polarization property preferably at ultraviolet band, the number of plies of carbon nano-tube film is more many in polarization element, and the degree of polarization of polarization element is more high, can all have good polarization property at each wave band.
In addition, those skilled in the art also can do other variations in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.
Claims (10)
1. polarization element, it comprises that a supporter and is arranged at the light polarizing film of this supporter, it is characterized in that: described light polarizing film is that one deck carbon nano-tube film or the multilayer carbon nanotube films that piles up are formed, the continuous films structure of described carbon nano-tube film for being formed to be arranged of preferred orient by Van der Waals force by a plurality of end to end carbon nano-tube bundles, the width of this carbon nano-tube film is 1 centimetre to 10 centimetres.
2. polarization element as claimed in claim 1, it is characterized in that, when this light polarizing film is that multilayer carbon nanotube films piles up when constituting, carbon nano-tube bundle in this multilayer carbon nanotube films aligns substantially in the same direction, closely is connected to form stable multilayer carbon nanotube films structure owing to Van der Waals force between the multilayer carbon nanotube films.
3. polarization element as claimed in claim 2 is characterized in that, the number of plies of this carbon nano-tube film is greater than 10 layers.
4. polarization element as claimed in claim 1 is characterized in that, the thickness of described carbon nano-tube film is 0.01～100 micron.
5. polarization element as claimed in claim 1 is characterized in that, described carbon nano-tube film is a plurality of by the membrane structure of the end to end carbon nano-tube bundle of Van der Waals force to be arranged of preferred orient and to form.
6. polarization element as claimed in claim 1 is characterized in that, described supporter is fixed frame or transparency carrier.
7. polarization element as claimed in claim 6, it is characterized in that described supporter is fixed frame, the viscosity of described carbon nano-tube film utilization one's duty directly adheres to fixed frame, make fixing by fixed frame of this carbon nano-tube film all around, the center section of this carbon nano-tube film is unsettled.
8. preparation method who prepares polarization element as claimed in claim 1, it may further comprise the steps:
One carbon nano pipe array is provided, and the preparation method of above-mentioned carbon nano pipe array may further comprise the steps:
One smooth substrate is provided;
Evenly form a catalyst layer at substrate surface;
The above-mentioned substrate that is formed with catalyst layer was annealed in 700～900 ℃ air 30 minutes 90 minutes; And
The substrate of handling is placed reacting furnace, be heated to 500～740 ℃ under the blanket gas environment, fed the carbon source solid/liquid/gas reactions then 5～30 minutes, it highly is 200～400 microns carbon nano pipe array that growth obtains;
Adopt a stretching tool to pull from carbon nano pipe array and obtain one deck carbon nano-tube film at least, the preparation of this carbon nano-tube film specifically may further comprise the steps:
A plurality of carbon nano-tube bundles of selected certain width from above-mentioned carbon nano pipe array;
Be basically perpendicular to these a plurality of carbon nano-tube bundles of carbon nano pipe array direction of growth stretching with the certain speed edge, to form a continuous carbon nano-tube film;
One supporter is provided, and the described carbon nano-tube film of one deck is adhered fixed in supporter along predetermined direction at least, thereby obtains polarization element.
9. polarization element, it comprises that a supporter and is arranged at the light polarizing film of this supporter, it is characterized in that, described light polarizing film is that 20 or 30 layers of carbon nano-tube film pile up formation is set, carbon nano-tube film in described 20 or 30 layers of carbon nano-tube film is a plurality of continuous films structures that formed to be arranged of preferred orient by the end to end carbon nano-tube bundle of Van der Waals force, and the width of this carbon nano-tube film is 1 centimetre to 10 centimetres.
10. polarization element, it comprises that a supporter and is arranged at the light polarizing film of this supporter, it is characterized in that, described light polarizing film is that a plurality of carbon nano-tube films do not have the gap side by side and are covered on the described supporter, the width of described supporter is greater than the width of described carbon nano-tube film, each carbon nano-tube film in described a plurality of carbon nano-tube film is for being 1 centimetre to 10 centimetres continuous films structure by a plurality of carbon nano-tube bundles by the join end to end width that forms of Van der Waals force, and described a plurality of carbon nano-tube bundles are arranged of preferred orient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011101748124A CN102207575B (en) | 2007-03-30 | 2007-03-30 | Polarizing element and manufacturing method thereof |
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| CN2011101748124A CN102207575B (en) | 2007-03-30 | 2007-03-30 | Polarizing element and manufacturing method thereof |
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| CN200710073765.8A Division CN101276012B (en) | 2007-03-30 | 2007-03-30 | Polarization element and preparation method thereof |
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| CN102207575B true CN102207575B (en) | 2013-08-21 |
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| CN104898327B (en) * | 2015-06-30 | 2019-01-22 | 厦门天马微电子有限公司 | Liquid crystal display, composite substrate and production method |
| CN104898328B (en) * | 2015-06-30 | 2019-04-09 | 厦门天马微电子有限公司 | Compartmentalization structure of polarized light and preparation method thereof, liquid crystal display panel |
| CN106199811B (en) * | 2016-08-29 | 2018-08-03 | 京东方科技集团股份有限公司 | A kind of preparation method of light polarizing film, display base plate and display device |
| CN108731823B (en) * | 2017-04-20 | 2020-02-07 | 清华大学 | Terahertz wave communication method |
| CN114215452B (en) * | 2021-12-22 | 2024-01-16 | 支付宝(杭州)信息技术有限公司 | Control method, device, system and equipment of intelligent screen window |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1482472A (en) * | 2002-09-10 | 2004-03-17 | �廪��ѧ | Polarized element and method for manufacturing same |
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| CN1248959C (en) * | 2002-09-17 | 2006-04-05 | 清华大学 | Carbon nano pipe array growth method |
| CN1290763C (en) * | 2002-11-29 | 2006-12-20 | 清华大学 | Process for preparing nano-carbon tubes |
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| CN1482472A (en) * | 2002-09-10 | 2004-03-17 | �廪��ѧ | Polarized element and method for manufacturing same |
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| Title |
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| Xiaobo Zhang et al.Spinning and processing continuous yarns from 4-inch waferscale super-aligned carbon nanotube arrays.《Advanced materials》.2006,第18卷1505-1510. * |
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