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A kind of preparation method of closed cell graphene oxide sponge

A graphene sponge, graphene technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds and other directions, can solve the problem of inability to prepare closed-cell graphene oxide sponge, etc., and achieve the effects of low cost, increased stacking, and environmental protection of the method

Inactive Publication Date: 2018-09-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention will solve the problem that the prior art cannot prepare closed-cell graphene oxide sponge, and provide a kind of preparation method of closed-cell graphene oxide sponge

Method used

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  • A kind of preparation method of closed cell graphene oxide sponge
  • A kind of preparation method of closed cell graphene oxide sponge
  • A kind of preparation method of closed cell graphene oxide sponge

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specific Embodiment approach 1

[0027] Specific embodiment one: present embodiment is a kind of preparation method of closed-cell graphene oxide sponge, specifically is finished according to the following steps:

[0028] 1. Preparation of graphene oxide:

[0029] Add natural graphite to concentrated sulfuric acid with a mass fraction of 98% under ice bath conditions, and stir at a stirring speed of 300r / min to 400r / min for 10min to 40min, and then add KMnO 4 Add in 4 to 6 times, and stir at a stirring speed of 300r / min to 400r / min for 2h to 2.5h, then replace the ice bath, and place it in a constant temperature water bath at a temperature of 30 to 40°C. / min~400r / min stirring for 30min~60min, then transferred to a constant temperature water bath with a temperature of 80°C, and continued to heat up to 80°C under the condition of a stirring speed of 300r / min~400r / min, and then distilled water for 1 minute Add 4 to 6 times, stir at a stirring speed of 300r / min to 400r / min for 15min to 20min, then dilute with d...

specific Embodiment approach 2

[0037] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the distilled water I, distilled water II and distilled water III described in step 1 are all distilled water. Others are the same as the first embodiment.

specific Embodiment approach 3

[0038] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step one, KMnO 4 Add in 5 equal amounts. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a preparation method of closed hole graphene oxide sponge, and relates to the preparation method of the closed hole graphene oxide sponge. The invention aims at solving the problem that the closed hole graphene oxide sponge cannot be prepared in the prior art. The preparation method comprises the following steps of 1, preparing graphene oxide; 2, preparing graphene oxide emulsion; 3, performing freeze drying to obtain the closed hole graphene oxide sponge. The method has the advantages that 1, a strong oxidant is used for oxidizing natural graphene, so that oxygen-containing functional groups are generated on the surface; further, the expansion and peeling are performed to obtain the graphene oxide; 2, the environment is protected; the method is simple; the cost is low; the repeatability is realized; the control is easy; the technical production can be realized. The closed hole graphene oxide sponge prepared by the method provides potential application prospects for the graphene to the aspects of design and preparation of heat isolation materials, boat sound absorption materials and hydrophobic materials.

Description

technical field [0001] The invention relates to a preparation method of a closed-pore graphene oxide sponge. Background technique [0002] Since its discovery in 2004, graphene has been regarded as a material with great potential. Graphene is a honeycomb 2D monolayer structure formed by carbon atoms connected by SP2 bonds. Due to its extremely high electrical and thermal conductivity, excellent mechanical strength, and large specific surface area, graphene is used in many It is widely used in various fields, such as supercapacitors, biochemical sensors, catalyst carriers, transparent conductive films, etc. However, there is a strong π-π attraction between graphene sheets, which makes graphene easy to stack together, which hinders the formation of various forms of microstructures of graphene and limits its application in industrial production. However, for the material itself, the microstructure directly affects its physical properties. In order to obtain materials with var...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/192C01B32/194
CPCC01P2004/03
Inventor 矫维成丁国民王荣国郝立峰徐忠海刘文博杨帆赫晓东刘伟光杨双赫孔嘉珣刘家印
Owner HARBIN INST OF TECH
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