title: Near-Infrared Light-Responsive Poly(N-isopropylacrylamide)/Graphene Oxide Nanocomposite Hydrogels with Ultrahigh Tensibility.
abstract: Novel near-infrared (NIR) light-responsive poly(N-isopropylacrylamide)/graphene oxide (PNIPAM-GO) nanocomposite hydrogels with ultrahigh tensibility are prepared by incorporating sparse chemical cross-linking of small molecules with physical cross-linking of graphene oxide (GO) nanosheets. Combination of the GO nanosheets and thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) polymeric networks provides the hydrogels with an excellent NIR light-responsive property. The ultrahigh tensibility of PNIPAM-GO nanocomposite hydrogels is achieved by simply using a very low concentration of N,N'-methylenebis(acrylamide) (BIS) molecules as chemical cross-linkers to generate a relatively homogeneous structure with flexible long polymer chains and rare chemically cross-linked dense clusters. Moreover, the oxidized groups of GO nanosheets enable the formation of a hydrogen bond interaction with the amide groups of PNIPAM chains, which could physically cross-link the PNIPAM chains to increase the toughness of the hydrogel networks. The prepared PNIPAM-GO nanocomposite hydrogels with ultrahigh tensibility exhibit rapid, reversible, and repeatable NIR light-responsive properties, which are highly promising for fabricating remote light-controlled devices, smart actuators, artificial muscles, and so on.
authors.affiliation: School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China.
authors.forename: Kun
authors.initials: K
authors.lastname: Shi
authors.affiliation: School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China.
authors.forename: Zhuang
authors.initials: Z
authors.lastname: Liu
authors.affiliation: School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China.
authors.forename: Yun-Yan
authors.initials: YY
authors.lastname: Wei
authors.affiliation: School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.affiliation: School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China.
authors.forename: Xiao-Jie
authors.initials: XJ
authors.lastname: Ju
authors.affiliation: School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China.
authors.forename: Rui
authors.initials: R
authors.lastname: Xie
authors.affiliation: School of Chemical Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China.|State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu, Sichuan 610065, P. R. China.
authors.forename: Liang-Yin
authors.initials: LY
authors.lastname: Chu
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D020100:Hydrogels / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*
chemical_list: D000180:Acrylic Resins; D020100:Hydrogels; C052970:poly-N-isopropylacrylamide; D006108:Graphite
keywords: graphene oxide; hydrogels; near-infrared light response; stimuli-responsive materials; ultrahigh tensibility