A method for preparing bulk graphene airgel

Abstract

The invention discloses a method for preparing block graphene aerogel. The method includes the specific steps that cheap small molecule epoxy propane serves as a cross-linking agent and is mixed with oxidized graphene or graphene dispersion liquid, a hydrothermal method is utilized to obtain graphene wet gel, drying is further conducted, and the graphene aerogel is obtained. The method is simple in operation step, good in repeatability, mild in reaction condition and suitable for industrialized production, the price of the cross-linking agent is low, and the finally obtained graphene aerogel is complete in block degree, low in density, good in elasticity and high in mechanical strength.

Description

technical field

[0001] The invention relates to the field of graphene airgel preparation, in particular to a simple and fast method for preparing graphene airgel with large block size, high strength and good compressibility. Background technique

[0002] Because aerogels have many unique advantages such as low density, small thermal conductivity, and well-developed pores, they are used in heat-insulating refractory materials, sound-absorbing and shock-absorbing materials, catalysts, dust traps, and purifiers for gas and water. Broad application prospects. Graphene aerogels (Graphene aerogels) not only have a series of characteristics of traditional aerogels, but because of the excellent physical and chemical properties of its building units, it further endows aerogels with unique three-dimensional structure properties, such as super adsorption. At the same time, based on Its unique monolithic structure, high specific surface area, and excellent electrical conductivity endow...

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