title: Graphene enhances the shape memory of poly (acrylamide-co-acrylic acid) grafted on graphene.
abstract: Acrylamide and acrylic acid are grafted on graphene by free-radical polymerization to produce a series of graphene-poly(acrylamide-co-acrylic acid) hybrid materials with different contents of graphene. The materials demonstrate shape memory effect and self-healing ability when the content of graphene is in the range of 10%-30% even though poly(acrylamide-co-acrylic acid) itself had poor shape memory ability. The permanent shape of the materials can be recovered well after 20 cycles of cut and self-healing. The result is attributed to the hard-soft design that can combine nonreversible "cross-link" by grafting copolymer on graphene and reversible "cross-link" utilizing the "zipper effect" of poly(acrylamide-co-acrylic acid) to form or dissociate the hydrogen-bond network stimulated by external heating.
authors.affiliation: College of Materials, Xiamen University, Xiamen, 361005, PR China.
authors.forename: Jun
authors.initials: J
authors.lastname: Dong
authors.forename: Jiabao
authors.initials: J
authors.lastname: Ding
authors.forename: Jian
authors.initials: J
authors.lastname: Weng
authors.forename: Lizong
authors.initials: L
authors.lastname: Dai
mesh_terms: D000178:Acrylamides / Q000737:chemistry*; D005609:Free Radicals / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D006860:Hydrogen Bonding; D058105:Polymerization
chemical_list: D000178:Acrylamides; D005609:Free Radicals; C431184:poly(acrylamide-co-acrylic acid); D006108:Graphite