CN112951511A - Aramid conductive film and preparation method and application thereof - Google Patents
Aramid conductive film and preparation method and application thereof Download PDFInfo
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- CN112951511A CN112951511A CN202110134231.1A CN202110134231A CN112951511A CN 112951511 A CN112951511 A CN 112951511A CN 202110134231 A CN202110134231 A CN 202110134231A CN 112951511 A CN112951511 A CN 112951511A
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- 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
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- 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
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Abstract
The invention discloses an aramid fiber conductive film and a preparation method and application thereof. The preparation method comprises the following steps: dissolving aramid fiber in concentrated sulfuric acid to form an aramid fiber membrane casting solution; applying the aramid fiber casting film liquid to the surface of a substrate, then placing the substrate in ethanol dispersion liquid of silver nanowires for phase transfer treatment, and then soaking the obtained substrate in solidification liquid for solidification treatment to obtain a gel film; and drying the obtained gel film to obtain the aramid fiber conductive film. The preparation method of the aramid fiber conductive film is simple and convenient to operate, the prepared aramid fiber conductive film has good mechanical property of aramid fiber and excellent conductivity of silver nanowires, is high-temperature resistant and solvent resistant, has long service life, and can be widely applied to the field of electronic devices.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to an aramid fiber conductive film and a preparation method and application thereof.
Background
Aramid fiber is a high-performance material, has excellent performances of high temperature resistance, organic solvent resistance, high strength, light weight, insulation, aging resistance, long service cycle and the like, and is widely applied to the fields of building materials, special protective clothing, composite materials, electronic devices and the like. However, the aramid fiber molecular chain has a large amount of rigid molecules and strong intermolecular forces, so that the aramid fiber is difficult to dissolve and difficult to process into a film, and the insulating property of the aramid fiber molecular chain partially limits the application range of the aramid fiber. Silver is used as a high-conductivity metal, aramid fibers can be modified, and the application field of the aramid fibers is expanded.
Disclosure of Invention
The invention mainly aims to provide an aramid fiber conductive film, a preparation method and application thereof, so as to overcome the defects of the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
the embodiment of the invention provides a preparation method of an aramid fiber conductive film, which comprises the following steps:
dissolving aramid fiber in concentrated sulfuric acid to form an aramid fiber membrane casting solution;
applying the aramid fiber casting film liquid to the surface of a substrate, then placing the substrate in ethanol dispersion liquid of silver nanowires for phase transfer treatment, and then soaking the obtained substrate in solidification liquid for solidification treatment to obtain a gel film;
and heating and drying the obtained gel film to obtain the aramid fiber conductive film.
The embodiment of the invention also provides the aramid fiber conductive film prepared by the method, which comprises an aramid fiber film substrate and silver nanowires uniformly distributed on the surface of the aramid fiber film substrate.
The embodiment of the invention also provides application of the aramid fiber conductive film in the fields of building materials, special protective clothing, composite materials or electronic devices.
Compared with the prior art, the invention has the beneficial effects that:
(1) the aramid fiber conductive film prepared by the invention keeps the performance of aramid fiber, and has excellent mechanical property, good temperature resistance, organic solvent resistance and other properties;
(2) silver nanowires in the aramid fiber conductive film prepared by the invention are uniformly dispersed on the surface of the aramid fiber film, and the silver nanowires and the aramid fiber have strong acting force and are not easy to fall off, so that the aramid fiber conductive film has good conductivity;
(3) the preparation method of the aramid fiber conductive film is simple and convenient to operate, the prepared aramid fiber conductive film has good mechanical property of aramid fiber and excellent conductivity of silver nanowires, is high-temperature resistant and solvent resistant, has long service life, and can be widely applied to the fields of building materials, special protective clothing, composite materials, electronic devices and the like.
Detailed Description
In view of the defects of the prior art, the inventor of the present invention has long studied and largely practiced to propose the technical solution of the present invention, which will be clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
One aspect of the embodiments of the present invention provides a preparation method of an aramid conductive film, including:
dissolving aramid fiber in concentrated sulfuric acid to form an aramid fiber membrane casting solution;
applying (casting) the aramid fiber membrane casting solution on the surface of a substrate, then placing the substrate in ethanol dispersion of silver nanowires for phase transfer treatment, and then soaking the obtained substrate in solidification liquid for solidification treatment to obtain a gel membrane;
and heating and drying the obtained gel film to obtain the aramid fiber conductive film.
In some more specific embodiments, the preparation method comprises:
the aramid fiber membrane casting solution is cast on the surface of a matrix, and then is placed in an ethanol dispersion liquid of silver nanowires for phase transfer treatment for 10-120 s at 30-70 ℃;
and immersing the matrix obtained after the phase transfer treatment in a solidification solution, and carrying out solidification treatment at 30-100 ℃ for 6-48 h to obtain the gel film.
Further, the concentration of the silver nanowires in the ethanol dispersion liquid of the silver nanowires is 1-200 mg/ml.
Further, the coagulation liquid includes at least any one of deionized water, ethanol, and a mixed solution of deionized water and ethanol, and is not limited thereto.
Furthermore, the concentration of the ethanol in the mixed solution of the deionized water and the ethanol is 10-100 wt%, and preferably 40 wt%.
Further, the substrate includes a substrate with a smooth and flat surface, such as a glass plate or a silicon wafer, and is not limited thereto.
Further, the preparation method further comprises the following steps: before the aramid fiber membrane casting solution is cast on the surface of a substrate, cleaning the substrate.
In some more specific embodiments, the aramid includes, but is not limited to, aramid powder and/or aramid fiber.
Further, the concentration of the concentrated sulfuric acid is more than 95 wt%.
Furthermore, the concentration of the aramid fiber in the aramid fiber membrane casting solution is 0.01-0.5 g/ml.
In some more specific embodiments, the preparation method comprises: and heating and drying the gel film at the temperature of 60-150 ℃ for 2-48 h to obtain the aramid fiber conductive film.
The embodiment of the invention also provides the aramid fiber conductive film prepared by the method, which comprises an aramid fiber film substrate and silver nanowires uniformly distributed on the surface of the aramid fiber film substrate.
The embodiment of the invention also provides application of the aramid fiber conductive film in the fields of building materials, special protective clothing, composite materials or electronic devices.
The invention prepares the aramid fiber conductive film by using a solution phase transfer method and using an aramid fiber casting solution obtained by dissolving aramid fiber with sulfuric acid. In the phase transfer process, the phase transfer rate can be delayed in the silver nanowire ethanol solution relative to the traditional water solidification liquid, so that the silver nanowires are tightly and uniformly dispersed and form a porous structure, then deionized water and absolute ethyl alcohol solidification liquid are used for accelerating phase transfer to form a film, the aramid fiber film enables the silver nanowires and the aramid fiber film to be tightly combined in the heating and drying process, the silver nanowires are not easy to fall off, and the aramid fiber conductive film is obtained.
The technical solution of the present invention is further described in detail with reference to several preferred embodiments, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.
The experimental materials used in the examples used below were all available from conventional biochemical reagents companies, unless otherwise specified.
Example 1
Adding 100mg of aramid fiber into 10ml of concentrated sulfuric acid, stirring to dissolve the aramid fiber to obtain an aramid fiber membrane casting solution, casting the aramid fiber membrane casting solution on a clean glass plate, then placing the aramid fiber membrane casting solution in 1ml of 1mg/ml silver nanowire ethanol solution, and carrying out phase transfer treatment for 120s at 30 ℃; then quickly transferring the gel film into a mixed solution (mass solubility is 40 wt%) of absolute ethyl alcohol and deionized water, and carrying out solidification treatment for 20h at 50 ℃ to obtain a gel film; and then, drying the gel film in an oven at 150 ℃ for 2h to obtain the aramid fiber conductive film.
Example 2
Adding 100mg of aramid fiber into 10ml of concentrated sulfuric acid, and stirring to dissolve the aramid fiber to obtain an aramid fiber membrane casting solution; casting the membrane casting solution on a clean glass plate, then placing the glass plate in a silver nanowire ethanol solution of 1mg/ml, carrying out phase transfer treatment for 120s at 30 ℃, then quickly transferring the glass plate into a mixed solution (with the mass solubility of 10 wt%) of ethanol and deionized water, and carrying out solidification treatment for 48h at 30 ℃ to obtain a gel membrane; and then, drying the gel film in an oven at 120 ℃ for 6 hours to obtain the aramid fiber conductive film.
Example 3
Adding 500mg of aramid fiber into 10ml of concentrated sulfuric acid, and stirring to dissolve the aramid fiber to obtain an aramid fiber membrane casting solution; casting the membrane casting solution on a clean glass plate, then placing the membrane casting solution in a 50mg/ml silver nanowire ethanol solution, carrying out phase transfer treatment for 120s at 50 ℃, then quickly transferring the membrane casting solution into a mixed solution (with the mass solubility of 60 wt%) of absolute ethyl alcohol and deionized water, and carrying out solidification treatment for 6h at 50 ℃ to obtain a gel membrane; and then placing the gel film in an oven to heat for 48 hours at 30 ℃ to obtain the aramid fiber conductive film.
Example 4
Adding 1g of aramid fiber into 10ml of concentrated sulfuric acid, and stirring to dissolve the aramid fiber to obtain an aramid fiber membrane casting solution; casting the membrane casting solution on a clean glass plate, placing the glass plate in a silver nanowire ethanol solution of 100mg/ml, carrying out phase transfer treatment for 30s at 70 ℃, then quickly transferring the glass plate into a mixed solution (with the mass solubility of 60 wt%) of absolute ethyl alcohol and deionized water, and carrying out solidification treatment for 40h at 40 ℃ to obtain a gel membrane; and then, drying the gel film in an oven at 80 ℃ for 24h to obtain the aramid fiber conductive film.
Example 5
Adding 2g of aramid fiber into 10ml of concentrated sulfuric acid, and stirring to dissolve the aramid fiber to obtain an aramid fiber membrane casting solution; casting the membrane casting solution on a clean glass plate, placing the glass plate in a silver nanowire ethanol solution of 200mg/ml, carrying out phase transfer treatment for 10s at 70 ℃, then quickly transferring the glass plate into absolute ethyl alcohol, and carrying out solidification treatment for 25h at 45 ℃ to obtain a gel membrane; and then, drying the gel film in an oven at 60 ℃ for 48 hours to obtain the aramid fiber conductive film.
And (3) carrying out performance test on the aramid conductive film prepared in the embodiment 1-5.
Table 1 shows the performance parameters of the aramid conductive films prepared in all the examples of the present invention.
| Name (R) | Tensile Strength (MPa) | Conductivity (omega/□) |
| Example 1 | 98 | 42 |
| Example 2 | 103 | 53 |
| Example 3 | 107 | 62 |
| Example 4 | 114 | 69 |
| Example 5 | 119 | 73 |
Example 6
Adding 100mg of aramid fiber into 10ml of concentrated sulfuric acid, and stirring to dissolve the aramid fiber to obtain an aramid fiber membrane casting solution; casting the membrane casting solution on a clean glass plate, placing the glass plate in a silver nanowire ethanol solution of 5mg/ml, carrying out phase transfer treatment at 45 ℃ for 120s, then quickly transferring the glass plate into deionized water, and carrying out solidification treatment at 100 ℃ for 6h to obtain a gel membrane; and then, drying the gel film in an oven at 120 ℃ for 6 hours to obtain the aramid fiber conductive film.
In addition, the inventors of the present invention have also made experiments with other materials, process operations, and process conditions described in the present specification with reference to the above examples, and have obtained preferable results.
The aspects, embodiments, features and examples of the present invention should be considered as illustrative in all respects and not intended to be limiting of the invention, the scope of which is defined only by the claims. Other embodiments, modifications, and uses will be apparent to those skilled in the art without departing from the spirit and scope of the claimed invention.
The use of headings and chapters in this disclosure is not meant to limit the disclosure; each section may apply to any aspect, embodiment, or feature of the disclosure.
Throughout this specification, where a composition is described as having, containing, or comprising specific components or where a process is described as having, containing, or comprising specific process steps, it is contemplated that the composition of the present teachings also consist essentially of, or consist of, the recited components, and the process of the present teachings also consist essentially of, or consist of, the recited process steps.
It should be understood that the order of steps or the order in which particular actions are performed is not critical, so long as the teachings of the invention remain operable. Further, two or more steps or actions may be performed simultaneously.
While the invention has been described with reference to illustrative embodiments, it will be understood by those skilled in the art that various other changes, omissions and/or additions may be made and substantial equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims. Moreover, unless specifically stated any use of the terms first, second, etc. do not denote any order or importance, but rather the terms first, second, etc. are used to distinguish one element from another.
Claims (10)
1. A preparation method of an aramid fiber conductive film is characterized by comprising the following steps:
dissolving aramid fiber in concentrated sulfuric acid to form an aramid fiber membrane casting solution;
applying the aramid fiber casting film liquid to the surface of a substrate, then placing the substrate in ethanol dispersion of silver nanowires for phase transfer treatment, and then soaking the obtained substrate in solidification liquid for solidification treatment to obtain a gel film;
and drying the obtained gel film to obtain the aramid fiber conductive film.
2. The production method according to claim 1, characterized by comprising:
and (3) casting the aramid fiber membrane casting solution on the surface of a substrate, and then placing the aramid fiber membrane casting solution in an ethanol dispersion solution of silver nanowires for phase transfer treatment at 30-70 ℃ for 10-120 s.
And immersing the matrix obtained after the phase transfer treatment in a solidification solution, and carrying out solidification treatment at 30-100 ℃ for 6-48 h to obtain the gel film.
3. The production method according to claim 1 or 2, characterized in that: the concentration of the silver nanowires in the ethanol dispersion liquid of the silver nanowires is 1-200 mg/ml.
4. The production method according to claim 1 or 2, characterized in that: the coagulating liquid comprises at least any one of deionized water, ethanol and a mixed solution of the deionized water and the ethanol; preferably, the concentration of ethanol in the mixed solution of the deionized water and the ethanol is 10-100 wt%.
5. The production method according to claim 1 or 2, characterized in that: the substrate comprises a glass plate and/or a silicon wafer.
6. The method of claim 1, wherein: the aramid fiber comprises aramid fiber powder and/or aramid fiber;
and/or the concentration of the concentrated sulfuric acid is more than 95 wt%.
7. The method of claim 1, wherein: the concentration of aramid fiber in the aramid fiber membrane casting solution is 0.01-0.5 g/ml.
8. The production method according to claim 1, characterized by comprising: and drying the gel film at the temperature of 60-150 ℃ for 2-48 h to obtain the aramid fiber conductive film.
9. The aramid conductive film prepared by the method of any one of claims 1 to 8, which comprises an aramid film matrix and silver nanowires uniformly distributed on the surface of the aramid film matrix.
10. Use of the aramid conductive film of claim 9 in the field of building materials, special protective clothing, composites or electronics.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134231.1A CN112951511B (en) | 2021-01-29 | 2021-01-29 | Aramid conductive film and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110134231.1A CN112951511B (en) | 2021-01-29 | 2021-01-29 | Aramid conductive film and preparation method and application thereof |
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| CN112951511A true CN112951511A (en) | 2021-06-11 |
| CN112951511B CN112951511B (en) | 2022-12-27 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050118480A1 (en) * | 2002-03-13 | 2005-06-02 | Bernd Bauer | Ion conducting composite membrane materials containing an optionally modified zirconium phosphate dispersed in a polymeric matrix, method for preparation of the membrane material and its use |
| CN103537198A (en) * | 2013-09-27 | 2014-01-29 | 中国科学院广州化学研究所 | Kevlar nano fiber porous membrane, and preparation method and application thereof |
| CN103908903A (en) * | 2014-03-13 | 2014-07-09 | 中科院广州化学有限公司南雄材料生产基地 | Self-cleaning aramid fiber film, preparation method thereof, and applications thereof in gas separation |
| CN104464973A (en) * | 2014-12-29 | 2015-03-25 | 中科院广州化学有限公司 | High-strength aramid fiber transparent conducting thin film and manufacturing method and application thereof |
-
2021
- 2021-01-29 CN CN202110134231.1A patent/CN112951511B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050118480A1 (en) * | 2002-03-13 | 2005-06-02 | Bernd Bauer | Ion conducting composite membrane materials containing an optionally modified zirconium phosphate dispersed in a polymeric matrix, method for preparation of the membrane material and its use |
| CN103537198A (en) * | 2013-09-27 | 2014-01-29 | 中国科学院广州化学研究所 | Kevlar nano fiber porous membrane, and preparation method and application thereof |
| CN103908903A (en) * | 2014-03-13 | 2014-07-09 | 中科院广州化学有限公司南雄材料生产基地 | Self-cleaning aramid fiber film, preparation method thereof, and applications thereof in gas separation |
| CN104464973A (en) * | 2014-12-29 | 2015-03-25 | 中科院广州化学有限公司 | High-strength aramid fiber transparent conducting thin film and manufacturing method and application thereof |
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