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Herein, a new design strategy is proposed to synthesize a dual physical cross\u2010linked polyethylene glycol\/poly(acrylic acid) (PEG\/PAA) double network hydrogel, consisting of ferric ion cross\u2010linked linear chain extensions of PEG (2,6\u2010pyridinedicarbonyl moieties incorporated into the PEG backbone, PEG\u2010H<jats:sub>2<\/jats:sub>pdca) as the first physical network and a PAA\u2010Fe<jats:sup>3+<\/jats:sup> gel as the second physical network. Metal\u2010ion coordination and the double network structure enable the double network hydrogel to withstand up to 0.4\u2005MPa tensile stress and 1560\u2009% elongation at breakage; the healing efficiency reaches 96.8\u2009% in 12\u2005h. In addition, due to dynamic ion transfer in the network, the resulting hydrogels exhibit controllable conductivity (0.0026\u20130.0061\u2005S\u2009cm<jats:sup>\u22121<\/jats:sup>) and stretching sensitivity. These functional self\u2010healing hydrogels have potential applications in electronic skin. It is envisioned that this strategy can also be employed to prepare other high\u2010performance, multifunctional polymers.<\/jats:p>","DOI":"10.1002\/chem.201800259","type":"journal-article","created":{"date-parts":[[2018,3,15]],"date-time":"2018-03-15T06:23:33Z","timestamp":1521095013000},"page":"6632-6638","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":53,"title":["A Conductive Self\u2010Healing Double Network Hydrogel with Toughness and Force Sensitivity"],"prefix":"10.1002","volume":"24","author":[{"given":"Shunli","family":"Liu","sequence":"first","affiliation":[{"name":"School of Chemistry and Chemical Engineering Southeast University  Nanjing 211189 P.R. 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