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Graphene Enhances the Shape Memory of Poly (acrylamide‐ co ‐acrylic acid) Grafted on Graphene
Author(s) -
Dong Jun,
Ding Jiabao,
Weng Jian,
Dai Lizong
Publication year - 2013
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201200814
Subject(s) - graphene , acrylic acid , acrylamide , materials science , copolymer , polymerization , grafting , polymer chemistry , self healing hydrogels , chemical engineering , polymer , composite material , nanotechnology , engineering
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.