Bioinspired graphene membrane with temperature tunable channels for water gating and molecular separation

Jingchong Liu, Nü Wang, Li Juan Yu, Amir Karton, Wen Li, Weixia Zhang, Fengyun Guo, Lanlan Hou, Qunfeng Cheng, Lei Jiang, David A. Weitz, Yong Zhao

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

Smart regulation of substance permeability through porous membranes is highly desirable for membrane applications. Inspired by the stomatal closure feature of plant leaves at relatively high temperature, here we report a nano-gating membrane with a negative temperatureresponse coefficient that is capable of tunable water gating and precise small molecule separation. The membrane is composed of poly(N-isopropylacrylamide) covalently bound to graphene oxide via free-radical polymerization. By virtue of the temperature tunable lamellar spaces of the graphene oxide nanosheets, the water permeance of the membrane could be reversibly regulated with a high gating ratio. Moreover, the space tunability endows the membrane with the capability of gradually separating multiple molecules of different sizes. This nano-gating membrane expands the scope of temperature-responsive membranes and has great potential applications in smart gating systems and molecular separation.

Original languageEnglish
Article number2011
JournalNature Communications
Volume8
Issue number1
DOIs
Publication statusPublished - 1 Dec 2017

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    Liu, J., Wang, N., Yu, L. J., Karton, A., Li, W., Zhang, W., Guo, F., Hou, L., Cheng, Q., Jiang, L., Weitz, D. A., & Zhao, Y. (2017). Bioinspired graphene membrane with temperature tunable channels for water gating and molecular separation. Nature Communications, 8(1), [2011]. https://doi.org/10.1038/s41467-017-02198-5