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Method for preparing tough integrated biomimetic layered graphene composite material

A composite material and graphene technology, which is applied in the field of nano-biomimetic composite material preparation, can solve the problems such as the construction of layered composite materials without reported dopamine/graphene oxide, and achieve good electrical conductivity, complete composite material structure, and good electrical properties. Effect

Active Publication Date: 2014-09-03
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Papers on dopamine / graphene oxide composites include: ACS Applied Materials & Interfaces, 4, 1016-1020.2012 (Reduction and Functionalization of Graphene Oxide Sheets Using Biomimetic Dopamine Derivatives in One Step.), Biomacromolecules, 13, 4236-4246.2012 (General and Biomimetic Approach to Biopolymer-Functionalized Graphene Oxide Nanosheet through Adhesive Dopamine.), Chemistry–A European Journal, 19, 8673-8678.2013 (Thiol–Yne Click Reactions on Alkynyl–Dopamine-Modified Reduced Graphene Oxide), the above papers only discuss how dopamine reduction Graphene oxide, there is no report on how to construct layered composites through dopamine / graphene oxide

Method used

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  • Method for preparing tough integrated biomimetic layered graphene composite material
  • Method for preparing tough integrated biomimetic layered graphene composite material
  • Method for preparing tough integrated biomimetic layered graphene composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 30 mg of graphene oxide, mechanically stir and disperse in 20 ml of deionized water, and then ultrasonically disperse for 1 h to form a brown transparent solution. Add 15ml of Tris (PH=8.5) buffer solution and 30mg of dopamine powder into the graphene oxide solution, and continue to stir. During this process, the solution turns from brown to black. Continue to stir for 12 hours, and dopamine and graphene oxide are covalently cross-linked , to mix the solution evenly. The graphene oxide-dopamine film composite material (GO-PDA-I, content of graphene oxide 50wt%) was obtained by evaporating to dryness in an oven (temperature 45° C.). After the reaction was completed, the graphene oxide-dopamine composite material was immersed in the hydroiodic acid solution and kept at 25 °C for 6 h. Then, wash with ethanol to remove excess hydroiodic acid, and dry to obtain biomimetic layered composite materials, such as figure 1 shown. Mechanical properties tests show that the ...

Embodiment 2

[0032] Weigh 40 mg of graphene oxide, mechanically stir and disperse in 20 ml of deionized water, and then ultrasonically disperse for 1 h to form a brown transparent solution. Add 15ml of Tris (PH=8.5) buffer solution and 20mg of dopamine powder into the graphene oxide solution, and continue stirring. During this process, the solution turns from brown to black. Stirring was continued for 12 hours, and dopamine and graphene oxide were covalently cross-linked to obtain a uniformly mixed solution. The graphene oxide-dopamine film composite material (GO-PDA-II, content of graphene oxide 67.7wt%) was obtained by evaporating to dryness in an oven (temperature 50° C.). After the reaction was completed, the graphene oxide-dopamine composite material was immersed in the hydroiodic acid solution and kept at 25 °C for 6 h. Then, rinse with carbon tetrachloride to remove excess hydroiodic acid and allow to dry. Its mechanical properties test shows that the tensile strength of the graph...

Embodiment 3

[0034] Weigh 45 mg of graphene oxide, mechanically stir and disperse in 20 ml of deionized water, and then ultrasonically disperse for 1 h to form a brown transparent solution. Add 15ml of Tris (PH=8.5) buffer solution and 15mg of dopamine powder into the graphene oxide solution, and continue stirring. During this process, the solution turns from brown to black. Stirring was continued for 12 hours, and dopamine and graphene oxide were covalently cross-linked to obtain a uniformly mixed solution. The graphene oxide-dopamine film composite material (GO-PDA-III, content of graphene oxide 75wt%) was obtained by steaming in an oven (at a temperature of 55° C.). After the reaction was completed, the graphene oxide-dopamine composite material was immersed in the hydroiodic acid solution and kept at 25 °C for 6 h. Then, wash with ethanol to remove excess hydroiodic acid and allow to dry. Mechanical properties tests show that the graphene oxide composite material has a tensile streng...

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Abstract

The invention discloses a method for preparing a tough integrated biomimetic layered graphene composite material. Inorganic graphene oxide and organic dopamine are formed into a bionic building layered graphene composite material by an evaporation-induced self assembly method under the inspiration of a natural abalone shell organic-inorganic micro-nano multi-stage layered assembly structure and organic-inorganic crosslinking. The obtained imitated abalone shell layered composite material not only has high strength, but also has high toughness, the strength is twice of that of the natural abalone shell, the toughness is 1.5 times of that of the natural abalone shell, and meanwhile, the biomimetic layered graphene composite material also has excellent conductivity, and has potential application in the fields such as aviation and aerospace, tissue engineering, capacitor electrodes and the like.

Description

technical field [0001] The invention relates to a preparation method of a strong and tough integrated bionic layered graphene composite material, which belongs to the field of nano bionic composite material preparation. Background technique [0002] Graphene is a carbon atom with sp 2 The hybridized orbitals compose a one-atom-thick layered film of a hexagonal honeycomb lattice. Graphene and carbon nanotubes belong to the family of new carbon materials, and are the thinnest, hardest, and toughest materials among known materials. Graphene has unique physical and chemical properties. It is almost completely transparent and only absorbs 2.3% of light. At room temperature, its electron transmission speed is dozens of times faster than that of silicon, and its thermal conductivity is as high as 5300W / m K, which is higher than that of carbon nanotubes. and diamond, while the resistivity is only about 10 -6 Ω·cm, which is lower than copper or silver, and is currently the materia...

Claims

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Application Information

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IPC IPC(8): C08G73/02C08K3/04
Inventor 程群峰崔炜刘季阳
Owner BEIHANG UNIV
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