CN104538088A - Constructing and preparation scheme of conductive elastic composite material - Google Patents
Constructing and preparation scheme of conductive elastic composite material Download PDFInfo
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- CN104538088A CN104538088A CN201410840099.6A CN201410840099A CN104538088A CN 104538088 A CN104538088 A CN 104538088A CN 201410840099 A CN201410840099 A CN 201410840099A CN 104538088 A CN104538088 A CN 104538088A
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Abstract
The invention belongs to the field of stretchable electronics and relates to a constructing and preparation scheme of a conductive elastic composite material, in particular to a constructing and preparation scheme of a conductive elastic body which keeps high resistance stability when stretches out and draws back. The high-stretching conductive elastic body comprises two main parts including an elastic main body and a conductive layer. The conductive layer adopts graphene, a carbon nano tube and other conductive materials as a basic conductive unit, and the elastic main body serves as a basic structural unit. An experiment result shows that the whole conductivity of the material can reach 10 Scm-1, elastic strain can reach 600-1000%, and the resistance change is smaller than 10% after 10000 times of repeated stretching. The conductive elastic composite material serves as the basic material of a flexible stretchable electronic device, and can be widely used for medical transplanting, intelligent clothes, artificial intelligence, biomimetic materials and the like.
Description
Technical field
The present invention relates to the person in electronics that can stretch, more definite finger, a kind of structure and preparation scheme that can keep the electrically conductive elastic composite material of high resistance stability when stretching, contraction.
Background technology
In recent years the stretched electronics just risen, for people bring completely new concept and experience.The flexible circuit that can stretch can complete the task that many rigid circuits cannot complete, and makes electronics device can be applied in many fields higher to " conformability " requirement, such as medical graft, intelligent clothing, artificial intelligence, biomimetic material etc.For example, concertina type electronic skin can connect and does evil through another person and nervous system; Use can stretch flexible circuit, and portable equipment can be embedded in clothes or even health, steady operation in stretching contraction process.This is that traditional rigid electronic materials and devices is difficult to realize.Establishment can be stretched arbitrarily and bending circuit, instead of is fixed on rigid chips and wiring board, is the direction of new material and development of electronic devices.
Conductive elastomer can be used as stretchable connection wire or electrode material, is to realize can stretch electronics and the basis of electronic device of can stretching.The researcher of countries in the world is seeking the various method making conductor have pliability and tensility.At present, the mode obtaining the conductor that can stretch mainly contains two kinds: a kind of method is that electrical-conductive nanometer material and elastomer are mixed and made into composite material, thus obtains conductive elastomer.This method is simply effective, usually can obtain the composite material with better tensility and conductivity.[1] composite material that this method is prepared resistance instability in drawing process, can increase several times of even hundreds of times.[2]。Another method is on elastomer, build the conductive film with special construction and configuration.This " surface coverage " method can make traditional metal material and semi-conducting material bear elongation strain to a certain degree and keep more stable resistance.Conductive elastomeric material resistance in drawing process prepared by this method is more stable, and just by the restriction of the mechanical property of electric conducting material own, material maximum strain is less than 10-20% usually.And due to attachment conductive layer thin, the resistance of conductive elastomer is usually very large, and in drawing process, resistance is unstable, and this significantly limit the research of the electronics that can stretch and this conductive elastomer can the application of tensile means.
List of references:
1. Sekitani, T.; Noguchi, Y.; Hata, K.; Fukushima, T.; Aida, T.; Someya, T., Science 2008, 321 (5895), 1468-1472.
2. Kim, Y.; Zhu, J.; Yeom, B.; Di Prima, M.; Su, X.; Kim, J.-G.; Yoo, S. J.; Uher, C.; Kotov, N. A., Nature 2013, 500 (7460), 59-63。
Summary of the invention
The object of this invention is to provide a kind of building mode and preparation method of novel electrically conductive elastic composite material.The method both can obtain the composite material with tensility and conductivity, and material can be made again under stretching repeatedly to a certain degree to keep stable resistance.
Building mode and the preparation method of electrically conductive elastic composite material provided by the invention are as follows:
1. the height stretching electrically conductive elastic composite material that the present invention relates to builds and preparation method is mainly divided into five steps, specifically sees schematic diagram 1.
2. the height stretching electrically conductive elastic composite material that the present invention relates to comprises two chief components, elastomer and conductive layers.Elastomer is as basic structural unit; Conductive layer adopts the electric conducting material such as Graphene, carbon nano-tube as basic conductive unit.For making whole conductive elastomer in drawing process keep steady resistance, surface of elastomer adopts undulated design, as shown in Figure 2.Like this, conductive layer (graphene layer) just change of shape can be ensured in drawing process, and fracture in layer can not be caused, thus increase considerably resistance.
3. the preparation of surface of elastomer waveform can adopt template and electron beam lithography.Wherein template can be used for preparing surface of elastomer large period waveform (>100 micron), and electron beam lithography can prepare minor cycle waveform (<100 micron).Two kinds of method compound uses can prepare binary cycle waviness of the surface.
4. combining closely of surface of elastomer and conductive layer prepares high stability can to stretch one of the primary condition of conductive elastomer.Surface of elastomer can introduce aromatic radical (as pyrene) by adopting surface modification technology, thus increases the active force with graphene layer.Concrete route introduces surface reactive amino group for adopting silane coupler, and then adopts carbodiimide coupling to form amido link to introduce aromatic radical to realize, as shown in Figure 3.
5. conductive layer and surface of elastomer Combined Mining solution impregnation-dry run realize, and the conductive layer number of plies and thickness can by infiltration-drying steps realizations repeatedly.The different resistance of conductive layer-elastic composite can be realized by controlling conductive layer thickness, thus obtain resistance-stable high stretching electrically conductive elastic composite material.
accompanying drawing illustrates:
Fig. 1. electrically conductive elastic composite material builds and preparation method's schematic diagram.
Fig. 2. surface of elastomer Waveform Design and conductive layer composite construction schematic diagram.
Fig. 3. surface of elastomer aromatic radical modifies route schematic diagram.
Fig. 4. large scale soluble conductive Graphene syntheti c route schematic diagram.
Fig. 5. experiment test figure.Wherein scheming (a) is: strain and resistance change curves in different number of plies Graphene height stretching conductive elastomer drawing process; Figure (b) is: containing the conductive elastomer resistance change curves in drawing process repeatedly of 15 layer graphene layers.
embodiment:
Embodiment. a kind of structure of conductive elastomer and extension test experiment repeatedly
(1) adopt sebs to add talcum powder to stir, using this compound as elastomer basic structural unit.
(2) elastomer of above-mentioned preparation is carried out surface design to go forward side by side the process of line period and amplitude, processing method adopts template, and design surface waveform be sine wave, and wave period is 20 microns.Amplitude is 20 microns.
(3) after having built basic cycle structure, surface of elastomer is modified, introduce aromatic radical---pyrene.Concrete route introduces surface reactive amino group for adopting silane coupler, and then adopts carbodiimide coupling to form amido link to introduce aromatic radical to realize, as shown in Figure 3.
(4) elastic electric conductor conductive adopts large scale soluble conductive Graphene, and aromatic group---pyrene is amine-modified in graphenic surface use.Preparation and method of modifying are shown in Fig. 4.
(5) by elastomer based mechanism unit and the tight compound of conductive unit.Complex method can be undertaken by surface deposition; Graphene layer thickness can by infiltration-drying steps realization repeatedly.Infiltrate-dry 15 times, the conductive elastomer of 15 layer graphene conductive layers can be obtained.
(6) by the trial-production of 1-30 layer graphene conductive layer and test, data show: material monolithic conductivity reaches 10 S cm-1; Elastic strain can reach 600%; Stretch 10000 resistance variations <10% repeatedly.Datagram is shown in Fig. 5.
Claims (8)
1. electrically conductive elastic composite material structure and preparation a scheme, the program selects the method for elastomer and conductive layer compound, makes the elastic strain of this composite material reach 600%-1000%; Stretch 10000 resistance variations <10% repeatedly.
2. electrically conductive elastic composite material of the present invention comprises two chief components: elastomer and conductive layer.
3. elastomer according to claim 2 is as the basic structural unit of electrically conductive elastic composite material, and its composition is ultra-soft level elastic caoutchouc, such as: sebs, and adding liquid paraffin, talcum powder.
4. surface of elastomer according to claim 2 is treated to waveform, wave period be 200 nanometers to 200 microns, wave amplitude is that 200 nanometers are to 20 microns; Can be single cycle, single amplitude, also can be two or more compounding period and composite amplitude; The preparation of waviness of the surface can adopt template or electron beam lithography.
5. surface of elastomer according to claim 2 needs to process, and processing mode can introduce aromatic radical by adopting surface modification technology, thus increases the active force with conductive layer; Such as adopting silane coupler to introduce surface reactive amino group, and then adopt carbodiimide coupling to form amido link to introduce aromatic radical---pyrene amine realizes.
6. conductive layer according to claim 2 adopts electric conducting material as basic conductive unit, and electric conducting material comprises but is not limited only to: Graphene, carbon nano-tube.
7. elastomer according to claim 2 and conductive layer surface compound can adopt solution impregnation-dry run to realize, and the conductive layer number of plies and thickness can by infiltration-drying steps realizations repeatedly.
8. the preparation of electrically conductive elastic composite material according to claim 2, its characteristic comprises following steps (1), step (2), step (3), step (4), step (5); Wherein step (1), (2), (3) and step (4) can in order, inverted order or synchronously carry out: (1) surface of elastomer Waveform Design; (2) surface of elastomer waveform preparation; (3) surface of elastomer is modified; (4) conductive layer preparation and modification; (5) elastomer and conductive layer surface compound.
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Cited By (11)
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| CN106129040A (en) * | 2016-07-21 | 2016-11-16 | 北京科技大学 | A kind of stretchable conductor cable and preparation method thereof |
| CN106229038A (en) * | 2016-09-07 | 2016-12-14 | 东华大学 | A kind of stretchable electrically conducting transparent method for producing elastomers based on multilevel hierarchy Graphene |
| CN107154282A (en) * | 2016-03-04 | 2017-09-12 | 江南石墨烯研究院 | Multilayer conductive elastic composite |
| CN108538516A (en) * | 2018-04-13 | 2018-09-14 | 复旦大学 | A kind of stretchable spring-like conductor wire and preparation method thereof |
| CN109249422A (en) * | 2017-07-14 | 2019-01-22 | 江苏申源新材料有限公司 | A kind of flexible high-strength robot skin preparation method |
| CN109346244A (en) * | 2018-09-28 | 2019-02-15 | 深圳大学 | A method of preparing stretchable electronic wire |
| CN110823084A (en) * | 2019-10-30 | 2020-02-21 | 重庆中科希腾科技有限公司 | Strain gauge and strain sensor based on carbon nano composite material |
| JP6696634B1 (en) * | 2018-11-16 | 2020-05-20 | 大日本印刷株式会社 | Wiring board and method for manufacturing wiring board |
| CN111724676A (en) * | 2019-03-21 | 2020-09-29 | 昆山工研院新型平板显示技术中心有限公司 | Stretchable wire, manufacturing method thereof and display device |
| TWI712055B (en) * | 2015-11-30 | 2020-12-01 | 日商拓自達電線股份有限公司 | Stretchable conductive film for textiles |
| CN113096853A (en) * | 2021-04-12 | 2021-07-09 | 北京化工大学 | Composite material based on two-dimensional nano conductive material and preparation method thereof |
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| TWI712055B (en) * | 2015-11-30 | 2020-12-01 | 日商拓自達電線股份有限公司 | Stretchable conductive film for textiles |
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| CN106229038A (en) * | 2016-09-07 | 2016-12-14 | 东华大学 | A kind of stretchable electrically conducting transparent method for producing elastomers based on multilevel hierarchy Graphene |
| CN109249422A (en) * | 2017-07-14 | 2019-01-22 | 江苏申源新材料有限公司 | A kind of flexible high-strength robot skin preparation method |
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| JP6696634B1 (en) * | 2018-11-16 | 2020-05-20 | 大日本印刷株式会社 | Wiring board and method for manufacturing wiring board |
| CN111724676A (en) * | 2019-03-21 | 2020-09-29 | 昆山工研院新型平板显示技术中心有限公司 | Stretchable wire, manufacturing method thereof and display device |
| CN110823084A (en) * | 2019-10-30 | 2020-02-21 | 重庆中科希腾科技有限公司 | Strain gauge and strain sensor based on carbon nano composite material |
| CN113096853A (en) * | 2021-04-12 | 2021-07-09 | 北京化工大学 | Composite material based on two-dimensional nano conductive material and preparation method thereof |
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