溶胶凝胶
单体
产量(工程)
化学工程
复分解
相(物质)
相变
材料科学
化学
纳米技术
聚合
有机化学
聚合物
复合材料
热力学
物理
工程类
作者
Thomas Hermans,Neeloo Singh
标识
DOI:10.1002/anie.202301529
摘要
Complex non-equilibrium phase behaviors are a hallmark of natural self-assembling systems. Here we show how intricate phase transitions can be achieved through a chemically fueled reaction cycle to yield autonomous sol→gel→sol→gel→sol transitions. A relay of chemical transformations based on thiazinane metathesis leads to two consecutive transient gelations in a closed system. Within seconds of fuel addition to deactivated thiazinane monomers, an imine-based hydrogel forms that consists of fibrillar microspheres. This gel quickly loses its mechanical strength and forms a solution, from which a second aldehyde-based gel nucleates and remains stable for over one day. Overall, our reaction cycle gives rise to two consecutive re-entrant phase transitions without any experimental intervention.
科研通智能强力驱动
Strongly Powered by AbleSci AI