Luo Yuzheng, Yang Yang, Wang Yongkang, Wu Zhanpeng, Russell Thomas P, Shi Shaowei
Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.
Angew Chem Int Ed Engl. 2022 Aug 15;61(33):e202207199. doi: 10.1002/anie.202207199. Epub 2022 Jul 5.
The interfacial jamming of nanoparticle surfactants offers the possibility of structuring liquids and fabricating all-liquid constructs with advanced functionality. However, less attention has been given to structured liquids with multiple responsiveness. Here, we show a novel, yet highly simplified nanoparticle surfactant model, pillar[6]arene (PA[6]) surfactant, by taking advantage of the host-guest interactions between a water-soluble PA[6] and an oil-soluble ligand, ferrocenium terminated polystyrene. PA[6] surfactants form rapidly at the oil-water interface, assemble into an elastic film with excellent mechanical strength, and when jammed, offer a "solid-like" assembly to lock-in highly nonequilibrium shapes of the liquids. The interfacial assembly/jamming and disassembly/unjamming of PA[6] surfactants can be controlled by chemical redox or competitive guest reagents, endowing the structured liquids with redox or guest-competitive responsiveness.
纳米颗粒表面活性剂的界面堵塞为构建液体结构以及制造具有先进功能的全液体结构提供了可能性。然而，对具有多重响应性的结构化液体的关注较少。在这里，我们展示了一种新颖但高度简化的纳米颗粒表面活性剂模型——柱[6]芳烃（PA[6]）表面活性剂，它利用了水溶性PA[6]与油溶性配体（二茂铁封端的聚苯乙烯）之间的主客体相互作用。PA[6]表面活性剂在油水界面迅速形成，组装成具有优异机械强度的弹性膜，并且在堵塞时提供一种“类固体”组装来锁定液体的高度非平衡形状。PA[6]表面活性剂的界面组装/堵塞以及拆卸/解堵塞可以通过化学氧化还原或竞争性客体试剂来控制，赋予结构化液体氧化还原或客体竞争性响应性。
