College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu 610065, People's Republic of China.
National Engineering Research Center for Biomaterials, Sichuan University , Chengdu 610064, People's Republic of China.
ACS Appl Mater Interfaces. 2017 Sep 20;9(37):32237-32247. doi: 10.1021/acsami.7b08740. Epub 2017 Sep 11.
Novel anion-responsive "intelligent" membranes with functional gates are fabricated by filling polyethersulfone microporous membranes with poly(ionic liquid)s (PILs) gels. The wetting properties of the PILs could be controlled by changing their counteranions (CAs), and thus, the filled PILs gel gates in the membrane pores could spontaneously switch from the "closed" state to the "open" one by recognizing the hydrophilic CAs in the environment and vice versa. As a result, the fluxes of the "intelligent" membranes could be tuned from a very low level (0 mL/m·mmHg for Cl, Br, and BF) to a relatively high one (430 mL/m·mmHg for TFSI). The anion-responsive gating behavior of the PILs filled membranes is fast, reversible, and reproducible. In addition, the "intelligent" membranes are sensitive to contact time and ion concentrations of the hydrophobic CA species. The proposed anion-responsive "intelligent" membranes are highly attractive for ion-recognizable chemical/biomedical separations and purifications.
通过在聚醚砜微孔膜中填充聚离子液体 (PIL) 凝胶，制备了具有功能门的新型阴离子响应“智能”膜。PIL 的润湿性可以通过改变其抗衡阴离子 (CA) 来控制，因此，填充在膜孔中的 PIL 凝胶门可以通过识别环境中的亲水性 CA 从“关闭”状态自发切换到“打开”状态，反之亦然。结果，“智能”膜的通量可以从非常低的水平（Cl、Br 和 BF 的 0 mL/m·mmHg）调至相对较高的水平（TFSI 的 430 mL/m·mmHg）。PIL 填充膜的阴离子响应门控行为快速、可逆且可重复。此外，“智能”膜对疏水性 CA 物质的接触时间和离子浓度敏感。所提出的阴离子响应“智能”膜在离子识别化学/生物医学分离和纯化方面具有吸引力。
