▎ 摘　　要

NOVELTY - Preparing two-phase flexible polydimethylsiloxane composite material, comprises (i) adding graphene to dispersoid and thoroughly mixing; (ii) adding curing agent to polydimethylsiloxane sponge; (iii) mixing the mixtures, and shaping and curing; and (iv) adding water to cured sample to dissolve the dispersoid in the sample, and drying to obtain reduced graphene oxide/polydimethylsiloxane conductive sponge which is a two-phase flexible polydimethylsiloxane composite material. USE - The method is useful for preparing two-phase flexible PDMS composite material in a wearable pressure sensor (claimed). ADVANTAGE - The method solves the problem of the conductive material is difficult to permeate into inside of the porous sponge through sugar particles to the graphene matrix, reduces the conductor sponge the inner particles between winding agglomeration phenomenon, improves the conductivity of graphene sponge, ensures the resistivity change rate under the same pressure improved, obtains the flexible resistance pressure sensor with maximum sensitivity and stability, has high sensitivity, fast responsiveness, good hysteresis, good repeating stability and good rebound performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) two-phase flexible polydimethylsiloxane composite material, prepared by arranging graphene on the inner hole wall of the polydimethylsiloxane sponge with wrinkles and burrs, where the graphene is not filled with whole hole of polydimethylsiloxane sponge, directionally arranging graphene surface on the polydimethylsiloxane sponge, and uniformly displaying smooth surface and distributed graphene sheet; and (2) wearable pressure sensor using two-phase flexible polydimethylsiloxane composite material preparation method, comprising connecting and assembling into a flexible resistance type pressure sensor by two-phase flexible polydimethylsiloxane composite material and conductive wire, and combining with wearable device for testing physiological signal of human body.