title: Zinc ion uniquely induced triple shape memory effect of dipole-dipole reinforced ultra-high strength hydrogels.
abstract: In this study, we demonstrate that dipole-dipole interaction can be employed to not only tremendously enhance the mechanical properties of hydrogel, but also impart the gel to an amazing ability to memorize two temporary shapes. Cross-linked hydrogels synthesized by copolymerization of acrylonitrile, a dipole-dipole containing monomer and hydrophilic comonomer are shown to exhibit triple shape memory (SM) triggered by the dynamic association and dissociation of dipole-dipole pairing between cynao groups uniquely responding to zinc ion species and concentration. This approach contributes to design and fabrication of novel SM hydrogels in a distinct way from conventional SM materials.
authors.affiliation: School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, P. R. China.
authors.forename: Yanjiao
authors.initials: Y
authors.lastname: Han
authors.forename: Tao
authors.initials: T
authors.lastname: Bai
authors.forename: Yuan
authors.initials: Y
authors.lastname: Liu
authors.forename: Xinyun
authors.initials: X
authors.lastname: Zhai
authors.forename: Wenguang
authors.initials: W
authors.lastname: Liu
mesh_terms: D000181:Acrylonitrile / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry; D003432:Cross-Linking Reagents; D020100:Hydrogels / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D007477:Ions / Q000737:chemistry; D008689:Methacrylates / Q000737:chemistry; D008968:Molecular Conformation; D010767:Phosphorylcholine / Q000737:chemistry; D013314:Stress, Mechanical; D015032:Zinc / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry
chemical_list: D002712:Chlorides; D003432:Cross-Linking Reagents; D020100:Hydrogels; D007477:Ions; D008689:Methacrylates; D017967:Zinc Compounds; D010767:Phosphorylcholine; C016837:zinc chloride; D015032:Zinc; D000181:Acrylonitrile