聚合物
材料科学
共价键
纳米技术
弹性体
分子机器
动态共价化学
混合材料
环氧树脂
智能材料
高分子科学
复合材料
分子
化学
有机化学
超分子化学
作者
Huan Liang,Shuai Zhang,Yawen Liu,Yang Yang,Yubai Zhang,Yahe Wu,Hongtu Xu,Yen Wei,Yan Ji
标识
DOI:10.1002/adma.202202462
摘要
Sophisticated shape-shifting structures and integration of advanced functions often call for different-chemistry-based polymers (such as epoxy and polyurethane) in a unified system. However, permanent cross-links pose crucial obstacles to be seamless. Here, merging interfaces via hybrid exchange reactions among different dynamic covalent bonds (including ester, urethane, thiourethane, boronic-ester, and oxime-ester linkages) is proposed, breaking the long-lasting restriction that these widely used bonds only undergo self-exchange reactions. Model compound studies are conducted to verify that hybrid exchange reactions occur. As demonstrations, different liquid crystal elastomers are tenaciously joined into coherent assemblies, with the desired biomimetic structures (e.g., flying fish containing stiff and flexible parts) and rare deformation modes (e.g., flower blooming upon both heating and cooling). Besides connecting polymers, hybrid exchange reactions also facilitate the creation of new materials through cross-fusion of different polymers. In addition to the polymers used in this work, hybrid exchange reactions can be adapted to other polymers based on similar mechanisms and beyond. Besides shape-shifting-related areas (e.g., soft robots, flexible electronics, and biomedical devices), it may also foster innovation in other fields involving general polymers, as well as promote deeper understanding of dynamic covalent chemistry.
科研通智能强力驱动
Strongly Powered by AbleSci AI