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


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 temperature-response 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.

SUBMITTER: Liu J 

PROVIDER: S-EPMC5722819 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature

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

Liu Jingchong J   Wang Nü N   Yu Li-Juan LJ   Karton Amir A   Li Wen W   Zhang Weixia W   Guo Fengyun F   Hou Lanlan L   Cheng Qunfeng Q   Jiang Lei L   Weitz David A DA   Zhao Yong Y  

Nature communications 20171208 1


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 temperature-response 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 vir  ...[more]

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