• 专利标题:   Self-powered hydrogel strain sensor useful for monitoring human health, comprises conductive friction layer, dielectric friction layer and copper foil electrode packaged by outer wrapping layer, preferably conductive friction layer, preferably silver nanowire electrode.
  • 专利号:   CN114767069-A
  • 发明人:   BU M, HU N, WANG Z
  • 专利权人:   UNIV HEBEI TECHNOLOGY
  • 国际专利分类:   A61B005/00, C08F220/56, C08F222/38, C08J003/075, C08K003/04, C08L033/26
  • 专利详细信息:   CN114767069-A 22 Jul 2022 A61B-005/00 202286 Chinese
  • 申请详细信息:   CN114767069-A CN10558187 21 May 2022
  • 优先权号:   CN10558187

▎ 摘  要

NOVELTY - Self-powered hydrogel strain sensor comprises a conductive friction layer (1), a dielectric friction layer (2) and a copper foil electrode (3) packaged by an outer wrapping layer. The conductive friction layer is a silver nanowire electrode, the dielectric friction layer is a hydrogel film, the dielectric friction layer is fixedly connected with the copper foil electrode and a distance is maintained between the conductive friction layer and the dielectric friction layer. USE - The self-powered hydrogel strain sensor is useful for monitoring human health in scientific research field and industry. ADVANTAGE - The self-powered hydrogel strain sensor: has scientific and reasonable structure and good effect; is economical and convenient use; can realize self-power supply, and can be popularized; and provides hydrogen bond between the amino group on the monomer acrylamide chain and the oxygen-containing group on graphene oxide enhances the strength and stability of the water gel network. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for manufacturing self-powered hydrogel strain sensor, comprising (i) dissolving the monomer acrylamide in the deionized water, stirring for 5-10 minutes, adding crosslinking agent N,N'-methylenebisacrylamide and the catalyst ammonium persulfate, and stirring again for 20 minutes to obtain the Polyacrylamide solution; (ii) adding the graphene oxide powder into the Polyacrylamide solution and stirring to prepare a 0.02 wt.% polyacrylamide/graphene oxide solution; (iii) performing ultrasonic treatment on the polyacrylamide/graphene oxide solution, using an ice bath as an ultrasonic bath during the ultrasonic treatment; (iv) taking the 1 ml sonicated solution, placing it into a cuboid polytetrafluoroethylene mold with a side length of 4cm and a height of 1mm, heating the mold at 80℃ for 18 minutes to generate cross-linking, taking out the cross-linked gelatinous substance and allowing to stand at room temperature for 5 minutes to obtain a polyacrylamide/graphene oxide hydrogel film; and (v) encapsulating the polyacrylamide/graphene oxide hydrogel film, the silver nanowire electrode and the copper foil electrode in the outer wrapping layer, so that the polyacrylamide/graphene oxide hydrogel film and the copper foil electrode are attached and fixedly connected and separating polyacrylamide/graphene oxide hydrogel films from silver nanowire electrodes. DESCRIPTION OF DRAWING(S) - The drawing shows a structure schematic diagram of the self-powered hydrogel strain sensor. 1Conductive friction layer 2Dielectric friction layer 3Copper foil electrode