title: Self-healing in tough graphene oxide composite hydrogels.
abstract: Polymer hydrogels that are capable of spontaneously healing injury are being developed at a rapid pace because of their great potential in biomedical applications. Here, the self-healing property of tough graphene nanocomposite hydrogels fabricated by using graphene peroxide as polyfunctional initiating and cross-linking centers is reported. The hydrogels show excellent self-healing ability at ambient temperature or even lower temperatures for a short time and very high recovery degrees (up to 88% tensile strength) can be achieved at a prolonged healing time. The healed gels exhibit very high tensile strengths (up to 0.35 MPa) and extremely high elongations (up to 4900%). The strong interactions between the polyacrylamide chains and the graphene oxide sheets are essential to the mechanical strengths of the healed gels.
authors: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, PR China.
authors: Jiaqi
authors: J
authors: Liu
authors: Guoshan
authors: G
authors: Song
authors: Changcheng
authors: C
authors: He
authors: Huiliang
authors: H
authors: Wang
mesh_terms: D006108:Graphite / Q000737:chemistry*; D020100:Hydrogels / Q000737:chemistry*; D015394:Molecular Structure; D010087:Oxides / Q000737:chemistry*; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D013718:Tensile Strength
chemical_list: D020100:Hydrogels; D010087:Oxides; D011108:Polymers; D006108:Graphite