期刊
NATURE COMMUNICATIONS
卷 11, 期 1, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-020-14854-4
关键词
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资金
- Engineering and Physical Sciences Research Council, UK [EP/K016946/1, EP/N013670/1]
- British Council [279336045]
- Graphene Flagship
- European Research Council [679689]
- EPSRC [EP/P022561/1, EP/R00661X/1, EP/P025021/1, EP/P025498/1, EP/P020194/1]
- European Research Council under the European Union [616121]
- Royal Society
- European Research Council (ERC) [679689] Funding Source: European Research Council (ERC)
- EPSRC [EP/P025021/1, EP/N013670/1, EP/K005014/1, EP/P020194/1, EP/S019367/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/P022561/1] Funding Source: researchfish
Manipulating the surface energy, and thereby the wetting properties of solids, has promise for various physical, chemical, biological and industrial processes. Typically, this is achieved by either chemical modification or by controlling the hierarchical structures of surfaces. Here we report a phenomenon whereby the wetting properties of vermiculite laminates are controlled by the hydrated cations on the surface and in the interlamellar space. We find that vermiculite laminates can be tuned from superhydrophilic to hydrophobic simply by exchanging the cations; hydrophilicity decreases with increasing cation hydration free energy, except for lithium. The lithium-exchanged vermiculite laminate is found to provide a superhydrophilic surface due to its anomalous hydrated structure at the vermiculite surface. Building on these findings, we demonstrate the potential application of superhydrophilic lithium exchanged vermiculite as a thin coating layer on microfiltration membranes to resist fouling, and thus, we address a major challenge for oil-water separation technology. Manipulation of surface energy and wetting properties of solids may impact a variety of processes, including membrane fouling. Here the authors tune properties of vermiculite laminates from superhydrophilic to hydrophobic by cation exchange, and demonstrate potential for fouling resistant oil-water separation.
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