A mechanically robust and reversibly wettable benzoxazine/epoxy/mesoporous TiO2 coating for oil/water separation

被引：107

作者：

Hu, Weihong ^{[1
]}

Huang, Jianguang ^{[1
]}

Zhang, Xin ^{[1
]}

Zhao, Sipei ^{[1
]}

Pei, Li ^{[1
]}

Zhang, Congyun ^{[1
]}

Liu, Yaqing ^{[1
]}

Wang, Zhi ^{[1
]}

机构：

[1] North Univ China, Res Ctr Engn Technol Polymer Composites Shanxi Pr, Sch Mat Sci & Engn, Taiyuan 030051, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2020年 / 507卷

基金：

中国国家自然科学基金;

关键词：

Mesoporous TiO2; Mechanically robust; Reversible wettability; Benzoxazine; Oil-water separation; FILTER-PAPER; SUPERHYDROPHOBIC SURFACES; THIN-FILMS; IN-SITU; OIL; NANOPARTICLES; FABRICATION; BENZOXAZINE; RESISTANCE; EFFICIENT;

D O I：

10.1016/j.apsusc.2019.145168

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Bisphenol A type benzoxazine, alicyclic epoxy resin and mesoporous TiO2 nanoparticles were blended and cured to form a ternary BETmes coating by spray coating process. The surface of BETmes coating can be reversed between hydrophilic and hydrophobic through alternate treatment with UV illumination and heating. The chemical composition of this BETmes coating was quantified, its surface morphology was observed, and the mechanism of reversible surface wettability was clarified. The conversion ratio of Ti-O-C/C-OH groups was maintained at 1.00:1.00. Additionally, the wear resistance of composite BETmes coatings was evaluated by wear testing. This surface exhibited excellent mechanically robust properties because of hydrophobicity retained after abrasion with SiC sandpaper (240 mesh) for 400 cm at an applied pressure of 2.5 MPa. Thus, a membrane with reversible wettability for oil-water separation was developed with this coating, which conveniently generated water. After over five cycles of reutilization, the separation flux was maintained at higher than 3000 L m(-2) h(-1), peaking at 3318 L m(-2) h(-1). In conclusion, mechanically robust coatings with reversible surface wettability, which are prepared based on this system, are feasibly applicable to real environments.

引用

页数：8

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