期刊
POLYMER CHEMISTRY
卷 5, 期 6, 页码 1945-1953出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3py00975k
关键词
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资金
- Natural Science Foundation of China [21074103]
- Fundamental Research Funds for the Central Universities [2010121018]
- Scientific Research Foundation for Returned Scholars
- NFFTBS [J1210014]
In this study, we develop a series of new materials that can simultaneously and reversibly self-heal without external stimuli based on metallo-supramolecular interactions. Multiple tridentate 2,6-bis(1,2,3-trizaol-4-yl)-pyridine (BTP) ligand units synthesized via a copper-catalyzed azide-alkyne cycloaddition (CuAAC) click reaction are incorporated into the polymer backbone of a ligand macromolecule through a thiol-ene click reaction. 3D transient supramolecular networks are formed from the ligand macromolecule upon coordination with transition and/or lanthanide metal ions. As compared to the ligand macromolecule, the resultant supramolecular films exhibit improved mechanical properties, such as Young's modulus, strength and toughness, which can be readily tuned by the stoichiometric ratio of Zn2+ to Eu3+ to Tb3+. The supramolecular films exhibit characteristics of weakly crosslinked networks where the storage modulus G' and loss modulus G '' scaled with normalized frequency omega a(T) by the same slope of 0.5. Both the supramolecular bulk films and gels are found to exhibit fast and effective self-healing properties by virtue of the kinetically labile nature of the metal-ligand interactions.
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