Surface Modification for Superhydrophilicity and Underwater Superoleophobicity: Applications in Antifog, Underwater Self-Cleaning, and Oil-Water Separation

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题名:	Surface Modification for Superhydrophilicity and Underwater Superoleophobicity: Applications in Antifog, Underwater Self-Cleaning, and Oil-Water Separation
作者:	黃俊仁;Huang, Kang-Ting;Yeh, Shiou-Bang;Huang, Chun-Jen
贡献者:	工學院化學工程與材料工程學系
关键词:	coatings;contact angle;energy conservation;heat;oil spills;oils;porosity;silane;stainless steel;transmittance;ultraviolet radiation;water vapor;zwitterions
日期:	2015-09-30
上传时间:	2026-04-21 14:39:36 (UTC+8)
出版者:	American Chemical Society;United States: American Chemical Society
摘要:	摘要： A facile yet effective surface modification strategy for superhydrophilicity and underwater superoleophobicity was developed by silanization of zwitterionic sulfobetaine silane (SBSi) on oxidized surfaces. The coatings exhibit excellent wetting properties, as indicated by static contact angles of <5°, and long-term stability under exposure to heat and UV irradiation. The SBSi-modified surfaces were employed for applications in antifog, self-cleaning, and oil–water separation. The SBSi glasses retained their optical transmittance because of the rapid formation of coalesced water thin films on surfaces in contact with water vapor and moisture. In addition, the underwater–oil contact-angle measurements verified the underwater superoleophobicity of the zwitterionic SBSi coatings. The oil spills on the SBSi coating could be readily removed in contact with water to realize the self-cleaning property. Besides, we modified stainless steel wire meshes with SBSi for oil–water separation. The optimal oil recovery rate for the oil–water mixtures reached >99.5% when using the SBSi-coated meshes with a pore size of 17 μm. More importantly, the water flux with modified meshes achieved 6.5 × 107 L/m2·h·bar, enabling gravity-driven and energy-saving separation. Consequently, we demonstrated the superhydrophilicity and underwater superoleophobicity of SBSi, offering promise in solving technological problems of interfacial fog, oil spills, and oil–water separation and thereby showing great potential in large-scale commercial applications. 其他題名： ACS Appl. Mater. Interfaces 出版者： United States: American Chemical Society 出版日期： 2015-09-30 出處： ACS Applied Materials & Interfaces, 2015-09, Vol.7 (38), p.21021-21029 資源來源： American Chemical Society Journals 版權： Copyright © 2015 American Chemical Society 識別號： ISSN: 1944-8244 識別號： ISSN: 1944-8252 識別號： EISSN: 1944-8252 識別號： DOI: 10.1021/acsami.5b07362 識別號： PMID: 26356193
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