Interfacial Polymerization at the Alkane/Ionic Liquid Interface.
Interfacial Polymerization at the Alkane/Ionic Liquid Interface.
复制标题
烷烃/离子液体界面的界面聚合。
DOI：
10.1002/anie.202103555
复制
发表时间：
2021-06-21
期刊：
影响因子：
--
通讯作者：
Xu ZK
中科院分区：
文献类型：
--
作者：
Liu C;Yang J;Guo BB;Agarwal S;Greiner A;Xu ZK
液-液界面聚合是合成分子筛用高分子薄膜的一个重要途径。然而，在烷烃-水界面外进行该过程仍然是一个重大挑战，因为它不仅会发生水引起的副反应，而且还限于水溶性单体。在这里，我们报告了在烷烃/离子液体界面（IP@AILI）处的界面聚合，其中离子液体作为用于多种胺的通用溶剂来合成任务特定的聚酰胺纳米膜。我们建议，IP@AILI发生时，酰氯从烷烃扩散到离子液体中，而不是在传统的烷烃-水系统中，这是由热力学分配和动力学监测证明胺的扩散所引发的。所制备的具有精确可调孔径的聚酰胺纳米膜在各种分离过程中显示出前所未有的渗透性和选择性。设计了烷烃/离子液体界面聚合反应。离子液体带来的可扩展性、可设计性和可控性取代了传统聚合中由水引起的不稳定性和低溶解性。在新的精细的水不溶性单体界面处合成的聚酰胺纳米膜具有可调节的孔径，并在各种分离应用中表现出前所未有的性能。
Polymerization at the liquid–liquid interface has attracted much attention for synthesizing ultrathin polymer films for molecular sieving. However, it remains a major challenge to conduct this process outside the alkane–water interface since it not only suffers water‐caused side reactions but also is limited to water‐soluble monomers. Here, we report the interfacial polymerization at the alkane/ionic liquid interface (IP@AILI) where the ionic liquid acts as the universal solvent for diversified amines to synthesize task‐specific polyamide nanofilms. We propose that IP@AILI occurs when acyl chloride diffuses from the alkane into the ionic liquid instead of being triggered by the diffusion of amines as in the conventional alkane–water system, which is demonstrated by thermodynamic partitioning and kinetic monitoring. The prepared polyamide nanofilms with precisely adjustable pore sizes display unprecedented permeability and selectivity in various separation processes. Interfacial polymerization at the alkane/ionic liquid interface has been designed. The extendibility, designability, and controllability brought by the ionic liquid replace the instability and low solubility caused by water in conventional polymerization. The polyamide nanofilms synthesized at the new delicate water‐insoluble monomer interfaces possess adjustable pore size and exhibit unprecedented performance in various separation applications.
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