Preparation method of bionic layered tough integral conductive graphene composite material

A technology of composite materials and conductive graphite, which is applied in the field of preparation of biomimetic layered strong and tough integrated conductive graphene composite materials, can solve the problems of unreported biomimetic composite materials, etc., and achieve the effect of flexible and rich interface design

Active Publication Date: 2015-09-23
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above patents and papers only discuss chitosan as the matrix material and graphene oxide as the reinforcing material to prepare nanocomposites, in which the content of graphene generally does not exceed 10%, and there is no report on the biomimetic composite constructed with graphene as the basic material. Materials (graphene content greater than 50%)

Method used

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  • Preparation method of bionic layered tough integral conductive graphene composite material
  • Preparation method of bionic layered tough integral conductive graphene composite material
  • Preparation method of bionic layered tough integral conductive graphene composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Weigh 10.5 mg of graphene oxide, mechanically stir and disperse it in 20 ml of deionized water, and then ultrasonically disperse for 20 minutes, resulting in a brown transparent solution. 0.45 ml of chitosan solution (mass fraction 1%) was added dropwise to the graphene oxide solution, and the stirring was continued. During this process, a brown-black gelatinous precipitate was precipitated. The heterogeneous suspension was ultrasonically treated for 5 minutes, adjusted to pH=8 with 0.5mol / L NaOH solution, and continued to be ultrasonicated for 10-15 minutes to obtain a uniformly dispersed graphene oxide-chitosan solution. The above solution is subjected to vacuum filtration to obtain a biomimetic layered graphene oxide composite material. During this process, due to the high content of chitosan, the ordered orientation of graphene sheets under the action of water flow was affected, so no chemical cross-linking occurred. Thermogravimetric analysis showed that the mass ...

Embodiment 2

[0034] Weigh 11.25 mg of graphene oxide, disperse it in 20 ml of deionized water with mechanical stirring, and then ultrasonically disperse it for 20 minutes, resulting in a brown transparent solution. 0.375 ml of chitosan solution (mass fraction 1%) was added dropwise to the graphene oxide solution, and the stirring was continued. During this process, a brown-black gelatinous precipitate was precipitated. The heterogeneous suspension was ultrasonically treated for 5 minutes, adjusted to pH=8 with 0.5mol / L NaOH solution, and continued to be ultrasonicated for 10-15 minutes to obtain a uniformly dispersed graphene oxide-chitosan solution. The above solution is subjected to vacuum filtration to obtain a biomimetic layered graphene oxide composite material. During this process, due to the high content of chitosan, the ordered orientation of graphene sheets under the action of water flow was affected, so no chemical cross-linking occurred. Thermogravimetric analysis showed that t...

Embodiment 3

[0036] Weigh 12 mg of graphene oxide, disperse it in 20 ml of deionized water with mechanical stirring, and then ultrasonically disperse for 20 minutes, resulting in a brown transparent solution. 0.3 ml of chitosan solution (mass fraction 1%) was added dropwise to the graphene oxide solution, and the stirring was continued. During this process, a brown-black gelatinous precipitate was precipitated. The heterogeneous suspension was ultrasonically treated for 5 minutes, adjusted to pH=8 with 0.5mol / L NaOH solution, and continued to be ultrasonicated for 10-15min to obtain a uniformly dispersed graphene oxide-chitosan solution. The above solution is subjected to vacuum filtration to obtain a biomimetic layered graphene oxide composite material. During this process, due to the high content of chitosan, the ordered orientation of graphene sheets under the action of water flow was affected, so no chemical cross-linking occurred. Thermogravimetric analysis showed that the mass fract...

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Abstract

The invention relates to a preparation method of a bionic layered tough integral conductive graphene composite material. In the nature, an abalone shell has excellent mechanical strength and toughness with its organic-inorganic micro-nano multi-level layer-by-layer assembly structure and composite interface. With the inspiration of the micro-nano multi-level structure and composite interface of the abalone shell, an inorganic phase graphene oxide and an organic phase chitosan are bionically constructed into a high-strength high-toughness conductive layered graphene composite material with a method of self-assembly induced by vacuum suction filtration. The tensile strength of the material is 4 times that of natural abalone shell, and the toughness of the material is 10 times that of natural abalone shell. The material also has excellent electrical conductivity, and can be widely applied in the fields of aerospace, capacitor electrode, tissue engineering, and the like.

Description

technical field [0001] The invention relates to a preparation method of a bionic layered strong and tough integrated conductive graphene composite material, and belongs to the field of nano composite material preparation. Background technique [0002] Graphene is a single-layer material of a two-dimensional honeycomb lattice composed of closely arranged carbon atoms, and is the building block of graphite. Graphene and carbon nanotubes belong to the same family of new carbon materials, and are the thinnest, hardest, and toughest materials in the known materials. At the same time, graphene has extremely high electron mobility (15000 cm 2 / V·s), thermal conductivity (5300W / m·K) and light transmittance (97.7%), it has great application potential in the field of new materials and special materials. [0003] As a derivative of graphene, Graphene Oxide contains a large number of oxygen-containing functional groups on the surface and edges, such as hydroxyl, carbonyl, carboxyl, et...

Claims

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Application Information

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IPC IPC(8): C08J7/14C08L5/08C08K9/00C08K3/04
Inventor 程群峰彭景淞万思杰
Owner BEIHANG UNIV
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