Preparation method of wave-absorbing powder, wave-absorbing powder and wave-absorbing material

Abstract

The present disclosure provides a preparation method of wave-absorbing powder, wave-absorbing powder and wave-absorbing material, and relates to the technical field of wave-absorbing. The preparation method of the wave-absorbing powder comprises the following steps: coating hollow glass beads with polydopamine PDA to generate a first water dispersion liquid; generating a second water dispersion liquid from the first water dispersion liquid and polydimethyl diallyl ammonium chloride PDDA, wherein the second water dispersion liquid is a water dispersion liquid in which the hollow glass beads are coated with PDA and PDDA from the inside to the outside; generating an intermediate powder from the second water dispersion liquid and a carbon nanotube CNT dispersion liquid, wherein the intermediate powder is a powder in which the hollow glass beads are coated with PDA, PDDA and CNT from the inside to the outside; and calcining the intermediate powder to generate the wave-absorbing powder after the polymer in the intermediate powder is carbonized, wherein the wave-absorbing powder is a powder in which the hollow glass beads are coated with carbon and CNT from the inside to the outside. The present disclosure can improve the wave-absorbing effect of the wave-absorbing material.

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