期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 10, 期 47, 页码 25106-25117出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta06053a
关键词
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资金
- Deutsche Forschungsgemeinscha (DFG) [SCHU 1229/65-1, 455748945, 364549901]
- Carl-Zeiss Foundation [P2019-02-001]
This study presents a simplified synthetic procedure for rewritable shape-memory metallopolymers that also possess self-healing abilities. The formation of different orthogonal metal-complexes is used to prepare interpenetrating metallopolymer networks. The resulting IPNs exhibit excellent shape-memory abilities and self-healing efficiencies.
This study presents the simplified synthetic procedure of rewritable shape-memory metallopolymers, additionally featuring self-healing abilities. The formation of different orthogonal metal-complexes is applied to prepare interpenetrating metallopolymer networks (IPNs). Two different linear polymers, one bearing terpyridine and the other containing trt-histidine ligands in the side chains, are individually synthesized via a controlled radical polymerization procedure. After the simple mixing of both polymers, metal salt(s) are added inducing the formation of stable terpyridine and labile trt-histidine metal complexes simultaneously, whereby an interpenetrating metallopolymer structure is generated. FT-Raman spectroscopy is applied to confirm the successful formation of the desired complexes. The resulting IPNs are investigated in a detailed fashion via differential scanning calorimetry as well as thermogravimetric analyses. Furthermore, thermo-mechanical analysis revealed excellent shape-memory abilities with strain fixity and recovery rates up to 99%. Moreover, as part of this kind of investigation, the rewriting of the permanent shape and its influence on the shape-memory abilities is studied, revealing the possibility to program and determine a completely new permanent shape without reducing the shape-memory abilities in a significant manner. Additionally, self-healing abilities are observed and scratch-healing efficiencies up to 98% could be reached.
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