High elasticity graphene membrane

A graphene film and high elasticity technology, applied in the field of new elastic graphene film material and its preparation, can solve the problems of troublesome operation, the graphene film does not have high stretching and high wrinkles, and the flexibility is not clear, and achieves a high level of tensile strength. Elasticity and flexibility

Active Publication Date: 2016-12-07
杭州德烯科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the currently prepared graphene films do not have high stretch and wrinkle, and cannot be applied in high wrinkle devices.
In 2016, Professor Shi Gaoquan used the method of macro-template assembly to create a lot of huge wrinkles on the surface of the gra...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of highly elastic graphene film is prepared by the following method:

[0022] (1) Add 20 parts by weight of ethyl acetate to 100 parts by weight of a graphene oxide aqueous solution with a concentration of 1 mg / mL; after ultrasonic dispersion, pour it on a mold plate, and dry it naturally under a relative air humidity of 70% to form an oxide Graphene film, make most (>90wt%) solvent volatilization, then remove remaining solvent at 60 ℃;

[0023] (2) Reducing the graphene oxide film treated in step 1 in hydroiodic acid solution. The HI content of the hydroiodic acid solution is shown in Table 1, the reduction temperature is 70°C, and the reduction time is 8h.

[0024] (3) The reduced graphene film was soaked in ethanol to wash off the surface hydroiodic acid, and then dried naturally to obtain a graphene elastic film.

[0025] Table 1: Properties of products at different hydriodic acid concentrations

[0026]

[0027] As can be seen from the above table, und...

Embodiment 2

[0029] A kind of highly elastic graphene film is prepared by the following method:

[0030] (1) Add 100 parts by weight of petroleum ether to 100 parts by weight of graphene oxide ethanol solution with a concentration of 2 mg / mL; after ultrasonic dispersion, pour it on the mold plate, and let it dry naturally under the relative air humidity of 80%. Graphene film, so that most (>90wt%) of the solvent is volatilized, and then the remaining solvent is removed at 100 ° C;

[0031] (2) Reducing the graphene oxide film treated in step 1 in hydroiodic acid solution. The HI content of the hydroiodic acid aqueous solution is 20 wt%, the reduction temperature is 100 degrees Celsius, and the reduction time is 4 hours.

[0032] (3) The reduced graphene film was soaked in ethanol to wash off the surface hydroiodic acid, and then dried naturally to obtain a graphene elastic film.

[0033] Such as figure 1 , 3 , 4, the highly elastic graphene film is formed by cross-linking a multilayer ...

Embodiment 3

[0035] A kind of highly elastic graphene film is prepared by the following method:

[0036] (1) Add 40 parts by weight of ethyl acetate to the graphene oxide DMF solution of 1.8 mg / mL at a concentration of 100 parts by weight; after ultrasonic dispersion, pour it on the mold plate and let it dry naturally under 50% relative air humidity Forming a graphene oxide film, making most (>90wt%) solvent volatilization, and then removing the remaining solvent at 80°C;

[0037] (2) Reducing the graphene oxide film treated in step 1 in hydroiodic acid solution. The HI content of the hydroiodic acid aqueous solution is 20 wt%, the reduction temperature is 100 degrees Celsius, and the reduction time is 4 hours.

[0038] (3) The reduced graphene film was soaked in ethanol to wash off the surface hydroiodic acid, and then dried naturally to obtain a graphene elastic film.

[0039] This highly flexible graphene thermally conductive film can withstand repeated bending for more than 100,000 t...

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Abstract

The invention discloses a high elasticity graphene membrane, which is obtained by subjecting oxidized graphene to solution film forming and chemical reduction. The graphene membrane is prepared by physically crosslinking macroscopic multilayer-wrinkle graphene having microscopic level wrinkles; in the macroscopic level, the membrane is composed of many macroscopic wrinkles, and thus the membrane has an extremely high horizontal elasticity. The membrane has an extremely good flexibility, and can be repeatedly folded for more than 100,000 times without any fold. The high flexibility graphene heat conductive membrane can be repeatedly folded for more than 100,000 times, the elastic breaking elongation rate is 20 to 50%, the conductivity is 600 to 1000 S/cm, and the graphene membrane can be used as a high elasticity flexible conductive device.

Description

technical field [0001] The invention relates to a novel elastic graphene membrane material and a preparation method thereof, in particular to a highly elastic graphene membrane. Background technique [0002] In 2010, two professors Andre GeiM and Konstantin Novoselov from the University of Manchester won the Nobel Prize in Physics for their first successful separation of stable graphene, which set off a wave of research on graphene around the world. Graphene has excellent electrical properties (electron mobility at room temperature can reach 2×10 5 m 2 / Vs), outstanding thermal conductivity (5000W / mK), extraordinary specific surface area (2630M 2 / g), its Young's modulus (1100GPa) and breaking strength (125GPa). The excellent electrical and thermal conductivity of graphene completely exceeds that of metals. At the same time, graphene has the advantages of high temperature resistance and corrosion resistance, and its good mechanical properties and low density make it have ...

Claims

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Application Information

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IPC IPC(8): C01B31/04
CPCC01B2204/20C01B2204/22C01B2204/26C01P2002/80C01P2004/03
Inventor 高超彭蠡许震
Owner 杭州德烯科技集团有限公司
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