▎ 摘　　要

NOVELTY - Preparing three-dimensional graphene composite gas gel involves mixing the oxidized graphene, cellulose nanocrystalline, organic amine and water, performing hydrothermal reaction to the obtained mixed solution to obtain hydrogel. The graphene oxide is prepared from expanded graphite by an improved Hummers method, the hydrogel is freeze-dried to obtain a three-dimensional graphene composite gas gel. USE - Method for preparing three-dimensional graphene composite gas gel used in pressure sensor (claimed). ADVANTAGE - The method enables to prepare three-dimensional graphene composite gas gel that has the characteristics of high sensitivity and good stability and can accurately monitor the movement of different joints of the human body. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a three-dimensional graphene composite gas gel, which comprises three-dimensional porous structure, and includes reduced graphene oxide, cellulose nanocrystals and organic amines in chemical composition.