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A kind of preparation method of self-supporting graphene three-dimensional porous material

A three-dimensional porous and graphene technology, applied in the field of materials, can solve problems such as difficult mass production, high time cost, and cumbersome preparation methods

Active Publication Date: 2021-10-19
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods all have the problems of cumbersome preparation methods and high time costs, making it difficult to produce in large quantities.

Method used

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  • A kind of preparation method of self-supporting graphene three-dimensional porous material
  • A kind of preparation method of self-supporting graphene three-dimensional porous material
  • A kind of preparation method of self-supporting graphene three-dimensional porous material

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preparation example Construction

[0039] Method for preparing self-support graphene three-dimensional porous material

[0040] The present invention provides a method of preparing a three-dimensional porous material of graphene, wherein the method comprising the step of: (1) providing a graphene dispersion, impregnating a sponge, remove the solvent, to obtain a sponge skeleton The surface is coated with graphene / sponge composites; (2) rapidly heat treatment in the step (1), removing the sponge, resulting in three-dimensional porous material of the self-support graphene.

[0041] Among them, the preparation method of the graphene dispersion in the step (1) comprises the step of being uniformly dispersed in an inert solvent to obtain the graphene dispersion. The concentration of the graphene dispersion is not particularly limited, and preferably a concentration of 1-10 mg / ml. In a preferred embodiment, the graphene dispersion is obtained by ultrasound. The power and time of the ultrasonic treatment are not parti...

Embodiment 1

[0051] (1) 0.5 g of the graphene nanofef was dispersed in 500 ml of ethanol solution, and a stable graphene dispersion was obtained at 120 W power.

[0052] (2) Put 1 × 1 × 2cm 3 Polyurethane Sponge (aperture 30-600 um) Invested Step (1) The graphene dispersion described. Then at 80 ° C for 30 min to remove ethanol, so that the outer surface of the sponge skeleton was coated with graphene / sponge.

[0053](3) The graphene / sponge described in step (2) is thermally treated with 60 kHz in the medium high frequency induction furnace at 1200 ° C heat treatment at 1200 ° C heat treatment at 1200 ° C, resulting in the final sample. Product is 1 × 1 × 2cm 3 Block-shaped self-supporting three-dimensional porous graphene, its macro picture figure 1 , Scanning electron micrographs figure 2 The graphene obtained from it can be seen is self-supporting three-dimensional porous structure. image 3 It is a Raman spectrum of the self-supporting three-dimensional porous graphene, a lower D shown ...

Embodiment 2

[0055] The preparation process and step in this embodiment are substantially identical to the above-described Embodiment 1, and the solvent in step (1) is N-methylpyrrolidone.

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Abstract

The invention provides a method for preparing a self-supporting graphene three-dimensional porous material. The method includes the steps of: (1) providing a graphene dispersion, soaking the sponge in the dispersion, and removing the solvent to obtain a sponge skeleton A graphene / sponge composite material whose surface is covered by graphene; (2) rapidly heat-treating the graphene / sponge composite material in the step (1), removing the sponge, and obtaining the self-supporting graphene three-dimensional porous material. The method is simple, fast, and low in cost, and the prepared self-supporting graphene three-dimensional porous material has excellent thermal conductivity, and can be used as a thermal interface material for electronic packaging.

Description

Technical field [0001] The present invention belongs to the field of material technology, and Background technique [0002] The special structure of graphene has excellent mechanics, thermal, electrical, and so on. The three-dimensional multi-hole macro body can be combined with the excellent performance of the nanomaterial as the properties of the macroscopic porous material, and a new type of material, a large specific surface area, a generic performance, and the unique new material. It achieves huge application prospects in the fields of electrode materials, hydrogen storage materials, biosensors, catalyst carriers, nano-electronic devices, monolecular detectors, etc. So far, the method of preparing graphene three-dimensional porous materials is mainly self-organizing, orienting template law and centrifugal vacuum method. However, there are all methods of preparation methods and high-cost preparation methods, and it is difficult to produce mass production. [0003] In summary,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01B2204/24C01P2002/82C01P2004/03
Inventor 代文林正得刘智多虞锦洪江南
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI