Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of graphene elastic film and preparation method thereof

A technology of elastic film and graphene film, applied in the direction of graphene, chemical instruments and methods, nano-carbon, etc., can solve the problems of incomplete elasticity, inability to apply high elastic devices, and limit the application of flexible devices

Active Publication Date: 2019-01-01
杭州德烯科技集团有限公司
View PDF9 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of graphene elastic film and preparation method thereof
  • A kind of graphene elastic film and preparation method thereof
  • A kind of graphene elastic film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Graphene oxide is formulated into a concentration of 6mg / mL graphene oxide aqueous solution, and 0.1% of the graphene oxide mass is added as an auxiliary agent in the solution, and the auxiliary agent is ammonium chloride; after dispersion, pour it on the mold plate Dry naturally to form a graphene oxide film at a relative air humidity of 50%;

[0028] (2) Reducing the dried elastic graphene oxide film in hydroiodic acid aqueous solution. The HI content of the hydriodic acid solution is 15wt%, the reduction temperature is 70° C., and the reduction time is 4 hours.

[0029] (3) The reduced graphene film was placed in ethanol at 90° C. for 5 minutes to wash away the hydroiodic acid on the surface, and then dried naturally to obtain a graphene elastic film.

[0030] 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%, the elastic compression rat...

Embodiment 2

[0032] (1) Graphene oxide is mixed with concentration and is 16mg / mL graphene oxide aqueous solution, in the solution, add the auxiliary agent of 0.5% of graphene oxide quality, described auxiliary agent is hydrochloric acid; After dispersion, pour on mold plate on Graphene oxide film is naturally dried under 70% relative air humidity;

[0033] (2) Reducing the dried elastic graphene oxide film in hydroiodic acid aqueous solution. The HI content of the hydriodic acid solution is 30wt%, the reduction temperature is 80°C, and the reduction time is 6h.

[0034] (3) The reduced graphene film was placed in ethanol at 40° C. for 10 min to wash away the hydroiodic acid on the surface, and then dried naturally to obtain a graphene elastic film.

[0035] 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 36%, the elastic compression rate is 94%, and the electrical ...

Embodiment 3

[0038] (1) Graphene oxide is mixed with concentration and is 20mg / mL graphene oxide aqueous solution, in the solution, add the auxiliary agent of 1% of graphene oxide quality, after described auxiliary agent is acetic acid dispersion, pour on mold plate in air Graphene oxide film is naturally dried under 60% relative humidity;

[0039] (2) Reducing the dried elastic graphene oxide film in hydroiodic acid aqueous solution. The HI content of the hydriodic acid solution is 35wt%, the reduction temperature is 90° C., and the reduction time is 8 hours.

[0040] (3) The reduced graphene film was placed in ethanol at 90° C. for 5 minutes to wash away the hydroiodic acid on the surface, and then dried naturally to obtain a graphene elastic film.

[0041] 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 50%, the elastic compression rate is 90%, and the electrical...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
radiusaaaaaaaaaa
breaking strengthaaaaaaaaaa
electrical conductivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a graphene elastic thin film and a preparation method thereof. The graphene elastic thin film is obtained by the steps of solution film formation and chemical reduction of graphene oxide. The graphene elastic thin film is formed by physical cross-linking of macroscopic multilayer fold graphene with micro scale folds; in the vertical direction, the thin film has a double-layer structure, and the double layers are connected through a multi-layer graphene film; in the horizontal direction, the thin film is formed by elastic through hemispherical fluctuations, and the folds are formed on a spherical wall, so that the thin film has extremely-high vertical compression elasticity and horizontal tensile elasticity. The thin film has excellent flexibility and keeps away from creases after being repeatedly folded for more than 100,000 times. The high-flexibility graphene thermal-conductive film can withstand repeated bending for more than 100,000 times, has an elastic elongation at break of 30-50 percent, a compression ratio of 80-90 percent, and an electric conductivity of 600-1000 S / cm and can be used as a high-elastic conductive device.

Description

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

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/182C01B32/184
CPCC01B2204/04C01B2204/26C01P2004/03
Inventor 高超彭蠡许震
Owner 杭州德烯科技集团有限公司