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A kind of highly elastic graphene paper

An elastic graphite and graphene technology, applied in the field of new elastic graphene film materials and their preparation, can solve the problems of unclear flexibility, inability to apply high elastic devices, and inability to meet the needs of rapid technological development.

Active Publication Date: 2019-02-19
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 graphene films prepared so far do not have high tensile and high elasticity, and cannot be applied in highly elastic devices.
In 2016, Professor Shi Gaoquan used the method of macro-template assembly to create a lot of huge folds on the surface of the graphene membrane, and achieved high elastic stretching of the graphene membrane, but its vertical compression did not involve
Its incomplete elasticity cannot meet the needs of rapid technological development
Moreover, the lack of film structure design makes its flexibility unclear, which limits its application in flexible devices.

Method used

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  • A kind of highly elastic graphene paper
  • A kind of highly elastic graphene paper
  • A kind of highly elastic graphene paper

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) graphene oxide is mixed with concentration and is 6mg / mL graphene oxide aqueous solution, adds gelling agent (0.01% of graphene oxide quality) in solution, and described gelling agent is iron trichloride; After dispersion, Gel at 80°C for 35h; then pour it on a mold plate and dry it naturally to form a graphene oxide film under 50wt% air relative humidity;

[0026] (2) Reducing the dried graphene oxide film in hydroiodic acid aqueous solution. The HI content of the hydriodic acid solution is 16 wt%, the reduction temperature is 71 degrees Celsius, and the reduction time is 4 hours.

[0027] (3) The reduced graphene film was placed in ethanol at 5° C. for 8 min to wash away the hydroiodic acid on the surface, and then dried naturally to obtain a graphene elastic film.

[0028] The highly flexible graphene heat-conducting film can withstand repeated bending for more than 100,000 times, the elastic elongation at break in the horizontal direction is 30.5%, the elastic ...

Embodiment 2

[0030] (1) Graphene oxide is formulated into a concentration of 10mg / mL graphene oxide aqueous solution, and a gelling agent (0.6% of the graphene oxide mass) is added in the solution, and the gelling agent is magnesium chloride; after dispersion, at 100°C Put the gel on for 24 hours; then pour it on a mold plate and dry it naturally to form a graphene oxide film at a relative humidity of 70%;

[0031] (2) Reducing the dried graphene oxide film in hydroiodic acid aqueous solution. The HI content of the hydriodic acid solution is 27wt%, the reduction temperature is 78 degrees Celsius, and the reduction time is 6.4 hours.

[0032] (3) The reduced graphene film was placed in ethanol at 7° C. for 8 min to wash away the hydroiodic acid on the surface, and then dried naturally to obtain a graphene elastic film.

[0033] The highly flexible graphene heat-conducting film can withstand repeated bending for more than 100,000 times, the elastic elongation at break in the horizontal dire...

Embodiment 3

[0037] (1) Graphene oxide is mixed with concentration and is 8mg / mL graphene oxide aqueous solution, adds gelling agent (2% of graphene oxide quality) in solution, and described gelling agent is vitamin C; After dispersion, at 70 Gel at ℃ for 48 hours; then pour it on the mold plate and dry it naturally at 61% relative air humidity to form a graphene oxide film;

[0038] (2) Reducing the dried graphene oxide film in hydroiodic acid aqueous solution. The HI content of the hydriodic acid solution is 35 wt%, the reduction temperature is 88 degrees Celsius, and the reduction time is 8.5 hours.

[0039] (3) The reduced graphene film was placed in ethanol at 60° C. for 9 minutes to wash away the hydroiodic acid on the surface, and then dried naturally to obtain a graphene elastic film.

[0040] The highly flexible graphene heat-conducting film can withstand repeated bending for more than 100,000 times, the elastic elongation at break in the horizontal direction is 51%, the elastic ...

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Abstract

The present invention discloses a high-elasticity graphene paper, which is obtained by carrying out solution film forming and chemical reduction on an oxidized graphene. According to the present invention, the graphene paper is formed by carrying out physical cross-linking on macroscopic multilayer folding graphene with microscopic folds; the film has a double-layer structure in a vertical direction and the layers are linked by the multilayer graphene film, and in a horizontal direction, the film is formed from elastic and penetrating spherical waves, such that the extremely high vertical compression elasticity and the extremely high horizontal stretching elasticity are provided; the graphene paper has excellent flexibility, wherein the folded mark is not generated after the graphene paper is repeatedly folded over 100000 times; and the graphene paper can resist repeated bending folding more than 100000 times, the elastic elongation at break is 30-50%, the compression rate is 80-90%, the conductivity is 600-1000 S / cm, and the graphene paper can be used as the high-elasticity electric conduction device.

Description

technical field [0001] The invention relates to a novel elastic graphene film material and a preparation method thereof, in particular to a highly elastic graphene paper. 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 the po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01P2004/03C01P2006/40
Inventor 高超彭蠡许震
Owner 杭州德烯科技集团有限公司