Preparation method of graphene-based wave absorbing material

Abstract

The invention belongs to the technical field of wave absorbing materials, and particularly relates to a preparation method of a graphene-based wave absorbing material. The preparation method of the graphene-based wave absorbing material comprises the following technological steps: 1) dissolving cobalt metal salt, ammonium fluoride and urea into water to obtain a metallic salt aqueous solution; 2)putting the metallic salt aqueous solution obtained in the step 1) into a hydrothermal kettle; 3) adding graphene into a stannous chloride solution, performing sensitization and activation in sequence, performing filtration and washing to form a neutral state by using deionized water, so as to obtain pre-treated graphene; 4) adding the pre-treated graphene prepared in the step 3) into the metallicsalt aqueous solution prepared in the step 2); (5) heating and drying an alkali type carbonate / graphene material obtained in the step 4), and then performing calcination to obtain a graphene composite wave absorbing material product. The preparation method of the graphene-based wave absorbing material has the beneficial effects that a wave absorbing frequency band is wide, the operability is strong, a preparation condition is mild, a reaction process is clean and free of pollution, the reaction efficiency is high, the reproducibility is good, and the graphene-based wave absorbing material hasgreater synthesis application prospect.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, and in particular relates to a preparation method of graphene-based wave-absorbing materials. Background technique [0002] Absorbing materials are a class of materials that can absorb electromagnetic wave energy projected onto its surface and convert it into heat energy through material loss. The original design of absorbing materials is mainly used in the research of stealth aircraft in the military. With the progress of society and the wide application of technologies such as wireless electromagnetic waves, wave-absorbing materials have also begun to be widely used in daily life such as construction and home appliances. [0003] Graphene is a newly discovered class of carbon materials with a two-dimensional structure. Due to its unique two-dimensional structure, graphene has many exotic physical properties, such as high specific surface area, low density, strong mechanical p...

AI Technical Summary

Problems solved by technology

However, regardless of its absorption strength, frequency band width or density, there is room for improvement