| abstract |
The invention discloses a preparation method of graphene/ceramic nanofiber/polyvinyl alcohol hybrid aerogel. A polymer precursor and polyvinylpyrrolidone powder are added to a mixed solution of tetrahydrofuran and absolute ethanol to perform electrospinning and heating. , high temperature pyrolysis to obtain ceramic nanofibers; glutaraldehyde, methanol, acetic acid, concentrated sulfuric acid, deionized water are mixed together, and magnetically stirred for 1 h to obtain an acidic solution of glutaraldehyde; graphene oxide, polyvinyl alcohol, ceramic nanofibers The fibers are added to the glutaraldehyde acid solution and stirred to obtain a uniform solution; the uniform solution is irradiated in a microwave oven, taken out, and subjected to directional freeze-drying, and then placed in a microwave oven in an argon atmosphere for microwave irradiation again to obtain graphite ene/ceramic nanofibers/polyvinyl alcohol hybrid aerogel. The problem that the existing single-component graphene aerogel has a small specific surface area, large mechanical brittleness and improper electrical conductivity causes the mismatch between the material impedance and the free space impedance. |