Abstract Herein, high performance polyethersulfone (PES) membranes were fabricated by introducing a series of imidazole-based deep eutectic solvents (DESs) as functional additives, which could tailor membrane structure due to the synergetic effect between DES components in phase inversion process. The addition of those DESs to the casting solutions all improved membrane porous structure, which contributed to a remarkably enhanced permeability and a high selectivity of the resultant membranes. Especially, the PES membrane with tetrabutylammonium chloride/imidazole as additive had a maximum water flux of 781 L/(m2 h), which was about 6.45 times that of the additive-free membrane, and a high BSA rejection of 97.7% at 2 bar. Moreover, the antifouling performance as well as thermal and mechanical properties of the prepared membranes was investigated. Overall, this work indicates the promise of imidazole-based DESs as alternative pore-forming additives for the fabrication of ultrafiltration membranes with superior performance.

中文翻译：

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咪唑基低共熔溶剂作为新型功能添加剂增强PES超滤膜的分离性能

摘要 在此，通过引入一系列咪唑基低共熔溶剂（DESs）作为功能添加剂制备了高性能聚醚砜（PES）膜，由于相转化过程中DES组分之间的协同作用，该溶剂可以定制膜结构。将这些 DES 添加到浇铸溶液中都改善了膜的多孔结构，这有助于显着提高所得膜的渗透性和高选择性。特别是，添加四丁基氯化铵/咪唑作为添加剂的 PES 膜的最大水通量为 781 L/(m2 h)，约为无添加剂膜的 6.45 倍，并且在 2 bar 下具有 97.7% 的高 BSA 截留率. 此外，研究了制备的膜的防污性能以及热和机械性能。