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A Highly Wrinkled Graphene Paper

A graphene paper and graphene technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems that graphene film does not have high stretch, high wrinkle, unclear flexibility, and limit the application of flexible devices

Active Publication Date: 2018-02-09
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 graphene membrane, and achieved high wrinkle 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 Highly Wrinkled Graphene Paper
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  • A Highly Wrinkled Graphene Paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Graphene oxide microspheres were obtained by spraying and drying a graphene oxide aqueous solution with a concentration of 4 mg / mL. The atomization drying temperature is 120°C

[0031] (2) The graphene oxide microspheres obtained in step (1) were rapidly heated to 800°C at 20°C / min and maintained for 10 minutes, and then heated to 3000°C at 5°C / min for graphitization.

[0032] Through the above steps, the obtained high specific surface area multi-fold hollow graphene microspheres have a diameter of 3 μm, such as Figure 6 shown. Its specific surface area is 600m 2 / g, the graphene sphere wall is composed of four layers of graphene, such as Figure 7 shown.

[0033] (3) The graphene oxide is formulated into a graphene oxide aqueous solution with a concentration of 6 mg / mL, and graphene oxide microspheres (0.03% of the graphene oxide mass) are added to the solution; after dispersion, gel at 76° C. for 29 h; then Pour it on the mold plate and dry naturally under 5...

Embodiment 2

[0038] (1) The graphene oxide DMF solution with a concentration of 1 mg / mL was sprayed and dried to obtain graphene oxide microspheres. The atomization drying temperature is 100°C.

[0039] (2) The graphene oxide microspheres obtained in step (1) were rapidly heated to 1000°C at 15°C / min and maintained for 10 minutes, and then heated to 3000°C at 3°C / min for graphitization.

[0040] Through the above steps, the obtained high specific surface area multi-fold hollow graphene microspheres have a diameter of 5 μm. Its specific surface area is 1100m 2 / g.

[0041] (3) Graphene oxide is formulated into an aqueous solution of graphene oxide with a concentration of 10 mg / mL, and graphene oxide microspheres (0.08% of the mass of graphene oxide) are added to the solution; after dispersion, gel at 90° C. for 26 h; then pour Dry naturally on the mold plate to form a graphene oxide film under 70% air relative humidity;

[0042] (4) Reducing the dried graphene oxide film in hydroiodic a...

Embodiment 3

[0048] (1) A graphene oxide methanol solution with a concentration of 10 mg / mL was sprayed and dried to obtain graphene oxide microspheres. The atomization drying temperature is 150°C

[0049] (2) The graphene oxide microspheres obtained in step (1) were rapidly heated to 1300°C at 18°C / min and maintained for 10 minutes, and then heated to 3000°C at 5°C / min for graphitization.

[0050] Through the above steps, the obtained high specific surface area multi-fold hollow graphene microspheres have a diameter of 4 μm. Its specific surface area is 1500m 2 / g.

[0051] (3) Graphene oxide is formulated into a graphene oxide aqueous solution with a concentration of 10 mg / mL, graphene oxide microspheres (2.3% of the graphene oxide mass) are added to the solution, and after dispersion, gel at 75° C. for 44 h; then Pour it on the mold plate and dry it naturally to form a graphene oxide film under 61% air relative humidity;

[0052] (4) Reducing the dried graphene oxide film in hydroio...

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Abstract

The invention discloses high-foldability graphene paper. The graphene paper is prepared by subjecting to graphene oxide to solution film forming and chemical reduction. The graphene paper is formed by graphene with micro-scale folds and macroscopic multilayer folds through physical crosslinking. In the vertical direction, a film has a double-layer structure, and the two layers are connected through multiple layers of graphene; in the horizontal direction, the film is formed by through spherical fluctuations, and accordingly the film is extremely high in vertical compression elasticity and horizontal tensile elasticity. The graphene paper is quite good in flexibility and can be repeated folded for more than 100, 000 times without leaving folding marks. The high-flexibility graphene thermal-conduction film can be folded for more than 100, 000 times, the elastic elongation at break of the film is 30-50%, the compression rate of the film is 80-90%, the conductivity of the film is 600-1000S / cm, and the film can be used as a high-elasticity conductor.

Description

technical field [0001] The invention relates to a novel elastic graphene membrane material and a preparation method thereof, in particular to a highly wrinkled 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 t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01P2004/03C01P2004/04C01P2006/40
Inventor 高超彭蠡许震
Owner 杭州德烯科技集团有限公司