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Malleable organic/inorganic thermosetting hybrids enabled by exchangeable silyl ether interfaces

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Abstract

Cross-linked elastomers are widely used in daily life; however, they become a stubborn environment problem at the end of their service life due to their thermosetting nature. Vitrimers, as a new class of materials with dynamic covalent networks that rely on associative exchange mechanisms, have been recently exploited for the development of covalently cross-linked recyclable elastomers. Herein, we report a facile strategy to achieve elastomeric vitrimers with mechanical robustness, malleability and recyclability by implementing dynamic covalent networks afforded by the interfacial silyl ether motifs in elastomer/silica hybrids. By virtue of its abundant surface silanol moieties, silica acts as both a reinforcement and cross-linker to endow the networks with chemical and mechanical robustness. Moreover, these permanent networks can reshuffle the topological structure upon temperature-induced trans-oxyalkylation reactions in the elastomer–silica interphase, enabling malleability and recyclability to the resultant materials. Since a wide variety of epoxy polymers and silanol-containing nanoparticles are easily accessible, we envisage that the present strategy can be a facile and universal avenue towards organic/inorganic hybrid vitrimers integrated with robustness, malleability and recyclability through the implementation of interfacial silyl ether-based networks.

Graphical abstract: Malleable organic/inorganic thermosetting hybrids enabled by exchangeable silyl ether interfaces

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Publication details

The article was received on 13 Oct 2018, accepted on 15 Nov 2018 and first published on 15 Nov 2018


Article type: Paper
DOI: 10.1039/C8TA09866B
Citation: J. Mater. Chem. A, 2019, Advance Article
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    Malleable organic/inorganic thermosetting hybrids enabled by exchangeable silyl ether interfaces

    S. Wu, Z. Yang, S. Fang, Z. Tang, F. Liu and B. Guo, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA09866B

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