▎ 摘　　要

NOVELTY - Preparing Fifth-Generation (5G) band aerogel and polymer interpenetrating wave absorbing material comprises e.g. (i) adding reduced graphene oxide in chitosan acetic acid solution for ultrasonic dispersion, adding carbon nanotubes, and uniformity dispersing by mechanical stirring and ultrasonic wave in turn to obtain mixed dispersion liquid of carbon nanotubes/graphene/chitosan, (ii) placing the polymer open-cell foam in the mixed dispersion, filling mixed dispersion into the open-cell foam by vacuum degassing, and returning to normal pressure, (iii) freezing and thawing the mixed dispersion liquid-filled foam material in sequence at low temperature to obtain hydrogel-filled foam material, and (iv) sequentially subjecting the hydrogel-filled foam material to low-temperature freezing, and sublimation drying to obtain aerogel-filled foam material. USE - The 5G band aerogel and polymer interpenetrating wave absorbing material is useful for absorbing electromagnetic wave signals in the Fifth-Generation (5G) mobile communication band (claimed). ADVANTAGE - The material has good wave-absorbing performance in the Fifth-Generation (5G) mobile communication frequency band, and has good mechanical properties after 100 compression cycles. DETAILED DESCRIPTION - Preparing Fifth-Generation (5G) band aerogel and polymer interpenetrating wave absorbing material comprises (i) adding reduced graphene oxide in chitosan acetic acid solution for ultrasonic dispersion, adding carbon nanotubes, and uniformity dispersing by mechanical stirring and ultrasonic wave in turn to obtain mixed dispersion liquid of carbon nanotubes/graphene/chitosan, (ii) placing the polymer open-cell foam in the mixed dispersion, filling mixed dispersion into the open-cell foam by vacuum degassing, and returning to normal pressure, (iii) freezing and thawing the mixed dispersion liquid-filled foam material in sequence at low temperature to obtain hydrogel-filled foam material, (iv) sequentially subjecting the hydrogel-filled foam material to low-temperature freezing, and sublimation drying to obtain aerogel-filled foam material, and (v) returning the aerogel-filled foam material to state of normal temperature and normal pressure after vacuum heat treatment, and obtaining Fifth-Generation (5G) band aerogel and polymer interpenetrating wave absorbing material.