Department of Chemistry and Biochemistry, Miami University, 651 E High Street, Oxford, OH, 45056, USA.
Graduate School of Advanced Integrated Studies in Human Survivability, Kyoto University, Higashi-Ichijo-Kan, Yoshida-nakaadachicho 1, Sakyo-ku, Kyoto, 606-8306, Japan.
Macromol Rapid Commun. 2021 Sep;42(18):e2100070. doi: 10.1002/marc.202100070. Epub 2021 May 6.
Covalent adaptable networks (CANs) based on the thiol-Michael (TM) linkages can be thermal and pH responsive. Here, a new vinyl-sulfone-based thiol-Michael crosslinker is synthesized and incorporated into acrylate-based CANs to achieve stable materials with dynamic properties. Because of the reversible TM linkages, excellent temperature-responsive re-healing and malleability properties are achieved. In addition, for the first time, a photoresponsive coumarin moiety is incorporated with TM-based CANs to introduce light-mediated reconfigureability and postpolymerization crosslinking. Overall, these materials can be on demand dynamic in response to heat and light but can retain mechanical stability at ambient condition.
基于硫醇-迈克尔（TM）键的共价适应性网络（CANs）可以对热和 pH 做出响应。在这里，合成了一种新的基于乙烯砜的硫醇-Michael 交联剂，并将其掺入基于丙烯酸盐的 CANs 中，以获得具有动态特性的稳定材料。由于可逆的 TM 键，实现了出色的温度响应再修复和延展性。此外，首次将光响应香豆素部分与基于 TM 的 CANs 结合，引入了光介导的可重构性和后聚合交联。总的来说，这些材料可以根据需要对热和光做出动态响应，但在环境条件下可以保持机械稳定性。
