▎ 摘　　要

NOVELTY - Preparing highly sensitive sandwich interlayer strain sensor based on hydrogel and carbon material, comprises (i) adding dispersing auxiliary agent into a beaker containing deionized water, stirring magnetically until completely dissolved, adding the carbon material and naturally drying at room temperature to prepare carbon material deposition layer; and (ii) dissolving polyvinyl alcohol in a mixed solution of glycerol and deionized water, adding polymerized monomer and cross-linking agent, continuously stirring until the solution is clear and transparent, adding the initiator ammonium persulfate, stirring for 5 minutes, quickly injecting uniformly mixed prepolymerization liquid into the two layers of the two molds with carbon material deposition layers, placing the mold in a blast oven to heat and polymerize, freezing the mold in low temperature, taking out and placing at room temperature and thawing and connecting lead to both ends of the sandwich material. USE - The method is useful for preparing highly sensitive sandwich interlayer strain sensor based on hydrogel and carbon material. ADVANTAGE - The method: is simple; and has high sensitivity, short response time and good stability. DETAILED DESCRIPTION - Preparing highly sensitive sandwich interlayer strain sensor based on hydrogel and carbon material, comprises (i) adding dispersing auxiliary agent into a beaker containing deionized water, stirring magnetically until completely dissolved, adding the carbon material and ultrasonically dispersing to obtain dispersion of carbon material, pouring the dispersion into a mold made of polymethyl methacrylate and silicone rubber, and naturally drying at room temperature to prepare carbon material deposition layer; and (ii) dissolving polyvinyl alcohol in a mixed solution of glycerol and deionized water, adding polymerized monomer and cross-linking agent, continuously stirring until the solution is clear and transparent, adding the initiator ammonium persulfate, stirring for 5 minutes under the protection of nitrogen, quickly injecting the uniformly mixed prepolymerization liquid into the two layers of the two molds with carbon material deposition layers, placing the mold in a blast oven to heat and polymerize, freezing the mold in low temperature, taking out and placing at room temperature and thawing to obtain a composite material with a carbon/hydrogel/carbon sandwich structure and connecting lead to both ends of the sandwich material.