▎ 摘　　要

NOVELTY - A polypyrrole/graphene oxide composite material based piezoresistive sensor manufacturing method involves adding pyrrole monomer to absolute ethanol to obtain pyrrole ethanol solution, adding iron(III) chloride to deionized water to obtain iron(III) chloride solution as oxidant of pyrrole, dissolving graphene oxide powder in deionized water and sonicating a dispersed negatively charged graphene oxide solution, washing with alcohol and deionized water, immersing the cube sponge in a dilute hydrochloric acid solution, immersing the surface of the positively charged polyurethane sponge into the graphene oxide solution, and adsorbing the graphene on the surface of the polyurethane sponge fiber by electrostatic action. The graphene oxide doped pyrrole polypyrrole is immersed in the iron(III) chloride solution. The obtained conductive layer-containing polyurethane sponge is rinsed with deionized water and absolute ethanol, and vacuum dried to remove moisture. USE - Method for manufacturing a polypyrrole/graphene oxide composite material based piezoresistive sensor. ADVANTAGE - The method enables manufacturing a polypyrrole/graphene oxide composite material based piezoresistive sensor with high sensitivity, wide detection range, flexible design and high stability. DETAILED DESCRIPTION - A polypyrrole/graphene oxide composite material based piezoresistive sensor manufacturing method involves adding pyrrole monomer to absolute ethanol to obtain pyrrole ethanol solution, adding iron(III) chloride to deionized water to obtain iron(III) chloride solution as oxidant of pyrrole, dissolving graphene oxide powder in deionized water and sonicating a dispersed negatively charged graphene oxide solution, cutting the commercially available polyurethane sponge into a cube, washing with alcohol and deionized water, immersing the cube sponge in a dilute hydrochloric acid solution to obtain a polyurethane sponge template having a positive charge on the surface, immersing the surface of the positively charged polyurethane sponge into the graphene oxide solution, and adsorbing the graphene on the surface of the polyurethane sponge fiber by electrostatic action to form a negatively charged graphene oxide-polyurethane sponge. The negatively charged polyurethane sponge is immersed in a pyrrole ethanol solution to form a graphene oxide doped pyrrole composite layer. The graphene oxide doped pyrrole polyurethane sponge is immersed in the iron(III) chloride solution to form a polyurethane sponge with a positively charged graphene oxide doped polypyrrole composite conductive layer under the oxidation of iron (III). The obtained conductive layer-containing polyurethane sponge is rinsed with deionized water and absolute ethanol, and vacuum dried to remove moisture.