▎ 摘　　要

NOVELTY - A conductive hydrogel comprises graphene oxide layer stacked in a double cross-linked hydrogel, where the dual cross-linked hydrogel are polyvinyl alcohol and sodium alginate are crosslinked to form a crosslinked structure. The graphene oxide layers are attached to a three-dimensional network framework of the double crosslinked hydrogel to form conductive path. The sheet layer of the graphene oxide is loaded with nano-silver particles. USE - The graphene oxide/silver nanoparticles conductive hydrogel is used for preparing flexible strain sensor used in flexible wear-resistant electronic device e.g. flexible sensor. ADVANTAGE - The graphene oxide/silver nanoparticles conductive hydrogel has high sensing performance, and improves the conductivity of graphene oxide. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a preparation method of graphene oxide/silver nanoparticles conductive hydrogel, comprising (i) adding the graphene oxide into strong alkali solution to adjust the pH to alkaline, adding epoxy chloropropane, dispersing the product into the buffer solution, adding terminal amino hyper-branched polymer to obtain aminated graphene oxide dispersion, where the graphene oxide is prepared by modified Hummers method; (ii) adding silver nitrate solution into the aminated graphene oxide dispersion liquid to obtain graphene oxide/silver nanoparticles solution; (iii) adding the solid polyvinyl alcohol/sodium alginate into the graphene oxide/silver nanoparticles solution, heating and dissolving, freezing, taking out and soaking in the calcium chloride solution to obtain the graphene oxide/silver nanoparticles conductive hydrogel; a use method of graphene oxide/silver nanoparticles conductive hydrogel, comprising when the graphene oxide/silver nanoparticles conductive hydrogel applying stress process, graphene oxide/silver nanoparticles conductive hydrogel tensile deformation, gradually deforming the three-dimensional network framework graphene oxide/silver nanoparticles conductive hydrogel, resulting in the distance between the graphene oxide layer is increased, increasing the corresponding to the reduced area contact the resistance of the graphene oxide/silver nanoparticles conductive hydrogel, when the graphene oxide/silver nanoparticles conductive hydrogel removing stress, the three-dimensional network framework graphene oxide/silver nanoparticles conductive hydrogel forms a reply trend, and drives the graphene oxide layer and nano-silver particle aggregation, and exhibits a graphene oxide/silver nanoparticles conductive hydrogel resistance is reduced; and a flexible strain type sensor, comprising graphene oxide/silver nanoparticles conductive hydrogel.