title: A Highly Stretchable Polymer that Can Be Thermally Healed at Mild Temperature.
abstract: Combining stretchability and self-healing properties in a man-made material is a challenging task. For an efficient self-healing material, weaker dynamic or reversible bonds should be presented as crosslinks so that they will first break upon damage and then reform after healing, which is not favorable when developing elastic materials. In this work, by incorporating dynamic Fe(III)-triazole coordination bonds into polydimethylsiloxane (PDMS) backbone, a highly elastic polymer is obtained that can be thermally healed at mild temperature. The as-prepared polymer can be stretched to 3400% strain at low loading speed (1 mm min(-1) ). When damaged, the polymer can be thermally healed at 60 °C for 20 h with a healing efficiency of over 90%. The good mechanical and healable properties of this polymer can be ascribed to the unique coordination bond strength and coordination conformation of Fe(III)-triazole coordination complex.
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Xiao-Yong
authors.initials: XY
authors.lastname: Jia
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Jin-Feng
authors.initials: JF
authors.lastname: Mei
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Jian-Cheng
authors.initials: JC
authors.lastname: Lai
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Cheng-Hui
authors.initials: CH
authors.lastname: Li
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Xiao-Zeng
authors.initials: XZ
authors.lastname: You
mesh_terms: D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry; D015394:Molecular Structure; D013696:Temperature
chemical_list: D004129:Dimethylpolysiloxanes; D005290:Ferric Compounds; C013830:baysilon
keywords: coordination bonds; elasticity; self-healing; triazoles