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Graphene-metal or semimetal shell-core structure composite material and preparation method thereof

A composite material and semi-metal technology, applied in the directions of alkali metal/alkaline earth metal/beryllium/magnesium hydride, metal processing equipment, non-metallic elements, etc., can solve the problem of poor structural stability, complex process and cost of shell-core structure composite materials. Advanced problems, to achieve the effect of expanding process realizability, improving coating process, and solving application barriers

Active Publication Date: 2016-10-26
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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Problems solved by technology

[0005] At present, the main method of graphene coating on metals and metal oxides is liquid-phase chemical reaction plus high-temperature sintering. The coating process includes chemical reaction, and the shell-core structure composite material is mainly generated by crystal precipitation. , the requirements for reaction conditions are relatively harsh; at the same time, its reaction medium is generally water, which is not suitable for some active metals or active semimetals; in addition, for metals, intermetallic compounds and metal oxides, its shell-core structure The formation of composite materials generally needs to be sintered at a high temperature above 800°C or assisted by laser heating. The process is complex and the cost is high. Some shell-core structure composite materials have poor structural stability. Capacitance is not good

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  • Graphene-metal or semimetal shell-core structure composite material and preparation method thereof
  • Graphene-metal or semimetal shell-core structure composite material and preparation method thereof
  • Graphene-metal or semimetal shell-core structure composite material and preparation method thereof

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preparation example Construction

[0067] The preparation method of the shell-core structure composite material of graphene / metal or semimetal of the present invention, comprises the steps:

[0068] Step (1), modifying graphene oxide, introducing surface functional groups to graphene oxide to obtain modified graphene oxide. Surface functional groups include amine groups, hydroxylamine groups, acyl groups, amide groups or epoxy groups, and the specific method for modifying graphene oxide includes the following steps:

[0069] (1.1), the graphene oxide aqueous solution is ultrasonically dispersed and stirred evenly to obtain a clear solution, and the concentration of the graphene oxide aqueous solution is 0.5-10 mg / mL.

[0070] (1.2), the modifying agent is slowly dropped into the graphene oxide clarified solution, stirred and refluxed, and the reaction temperature, drop rate and reflux time are controlled to obtain a modified graphene oxide solution; the modifying agent is ethylenediamine, hexamethylenediamine ...

Embodiment 1

[0079] Step 1: According to the surface state of the active metal Al (containing Al 2 o 3 Thin-layer covering), designed to graft hydroxylamine groups on the surface of graphene oxide to obtain hydroxylamine-modified graphene oxide (NHOH-GO), the specific process steps are as follows:

[0080] (1.1) Prepare a graphene oxide aqueous solution with a concentration of 10 mg / mL, place it in a 3-neck flask, ultrasonically and stir until it becomes a clear solution.

[0081] (1.2), according to the designed hydroxylamine functional group, the modifier N,N-diethylhydroxylamine was selected, and N,N-diethylhydroxylamine was slowly dropped into the graphene oxide solution and stirred and refluxed for a period of time, wherein N, The mass ratio of N-diethylhydroxylamine to graphene oxide was 1:5, the reaction temperature was controlled at 50 °C, the dropping rate was 45 drops / min, and the reflux time was 1 h to obtain a hydroxylamine-modified graphene oxide solution.

[0082] (1.3), th...

Embodiment 2

[0093] Step 1: According to the surface state of the active metal Ni (containing NiO thin-layer covering), design grafted amine groups on the surface of graphene oxide to obtain amine-modified graphene oxide (NH 2 -GO), the specific process steps are as follows:

[0094] (1.1), configure a graphene oxide aqueous solution with a concentration of 3 mg / mL, and place it in a 3-neck flask for ultrasonication and stirring to a clear solution;

[0095] (1.2), slowly drop modifier ethylenediamine into the graphene oxide clarified solution, stir and reflux for a period of time, wherein the mass ratio of ethylenediamine to graphene oxide is 1:10, control the reaction temperature to 40°C, drop The acceleration rate was 20 drops / min, and the reflux time was 4 hours to obtain an amine-modified graphene oxide solution.

[0096] (1.3), the amine-modified graphene oxide solution is centrifuged for 20min at a speed of 5000r / min, and the gel-like product of the amine-modified graphene oxide is...

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Abstract

The invention relates to a graphene-metal or semimetal shell-core structure composite material and a preparation method thereof. The method comprises the steps that obtained modified graphene oxide is taken as a base to be concentrated and dried by evaporation, and then organic solvent displacement is conducted to obtain an organic solution of the modified graphene oxide; the surface of metal or semimetal is coated with the modified graphene oxide through a liquid-phase self-assembly method to form a graphene-metal or semimetal coating solution; after filtering and drying are conducted, the graphene-metal or semimetal shell-core composite material is obtained. According to the method, a conventional organic matter and inorganic matter coating process is improved, the influences of the water solvent and high temperature on the activity of some metals and semimetals with the high reaction activity are reduced, process realization of a coating method is expanded, and application barriers of the graphene and the active metal or semimetal in an energy-containing material are solved.

Description

technical field [0001] The invention relates to a graphene / metal or semimetal shell-core structure composite material and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] Graphene is a carbon atom with sp 2 The hybrid orbitals form a hexagonal planar film with a honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. "Cut" different shapes of sheets from graphene, warping can get zero-dimensional fullerene, curling can get one-dimensional barrel-shaped carbon nanotubes, stacking can get three-dimensional graphite, so we think graphene is The basic unit that constitutes other carbon materials is the most ideal carbon material so far. The successful preparation of two-dimensional crystal materials represented by graphene has opened up a new era of development of new nanomaterials and functional materials / devices. [0003] Graphene oxide has the advantages of simple preparatio...

Claims

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Application Information

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IPC IPC(8): C06B21/00B22F1/02B22F9/24C01B31/04C01B6/04C01B6/06C01G3/02C01G21/06C01G49/06B22F1/102B22F1/16
CPCB22F9/24C01B6/04C01B6/06C01G3/02C01G21/06C01G49/06C06B21/0008C01P2002/72C01P2004/80B22F1/102B22F1/16C06B23/007C01B6/21C01B32/198C01P2004/84C06B21/0033C06B21/0083C06B45/20
Inventor 顾健张小平庞爱民
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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