Shao Yue, Wang Yong-Lei, Li Xiangshuai, Kheirabad Atefeh Khorsand, Zhao Qiang, Yuan Jiayin, Wang Hong
Key Laboratory of Functional Polymer Materials of the Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
Department of Materials and Environmental Chemistry, Stockholm University, 10691, Stockholm, Sweden.
Angew Chem Int Ed Engl. 2020 Sep 21;59(39):17187-17191. doi: 10.1002/anie.202002679. Epub 2020 Aug 6.
Reversible regulation of membrane microstructures via non-covalent interactions is of considerable interest yet remains a challenge. Herein, we discover a general one-step approach to fabricate supramolecular porous polyelectrolyte membranes (SPPMs) from a single poly(ionic liquid) (PIL). The experimental results and theoretical simulation suggested that SPPMs were formed by a hydrogen-bond-induced phase separation of a PIL between its polar and apolar domains, which were linked together by water molecules. This unique feature was capable of modulating microscopic porous architectures and thus the global mechanical property of SPPMs by a rational design of the molecular structure of PILs. Such SPPMs could switch porosity upon thermal stimuli, as exemplified by dynamically adaptive transparency to thermal fluctuation. This finding provides fascinating opportunities for creating multifunctional SPPMs.
通过非共价相互作用对膜微观结构进行可逆调控备受关注，但仍是一项挑战。在此，我们发现了一种从单一聚（离子液体）（PIL）制备超分子多孔聚电解质膜（SPPMs）的通用一步法。实验结果和理论模拟表明，SPPMs是由PIL在其极性和非极性域之间通过氢键诱导相分离形成的，这些域通过水分子连接在一起。这一独特特性能够通过合理设计PIL的分子结构来调节微观多孔结构，进而调控SPPMs的整体力学性能。这种SPPMs能够在热刺激下改变孔隙率，例如对热波动具有动态自适应透明度。这一发现为创造多功能SPPMs提供了引人入胜的机会。
