title: A superamphiphobic coating with an ammonia-triggered transition to superhydrophilic and superoleophobic for oil-water separation.
abstract: Superhydrophilic and superoleophobic materials are very attractive for efficient and cost-effective oil-water separation, but also very challenging to prepare. Reported herein is a new superamphiphobic coating that turns superhydrophilic and superoleophobic upon ammonia exposure. The coating is prepared from a mixture of silica nanoparticles and heptadecafluorononanoic acid-modified TiO2 sol by a facile dip-coating method. Commonly used materials, including polyester fabric and polyurethane sponge, modified with this coating show unusual capabilities for controllable filtration of an oil-water mixture and selective removal of water from bulk oil. We anticipate that this novel coating may lead to the development of advanced oil-water separation techniques.
authors.affiliation: Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216 (Australia).
authors.forename: Zhiguang
authors.initials: Z
authors.lastname: Xu
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Hongxia
authors.initials: H
authors.lastname: Wang
authors.forename: Xungai
authors.initials: X
authors.lastname: Wang
authors.forename: Tong
authors.initials: T
authors.lastname: Lin
keywords: hydrophobic effects; oil-water separation; porous materials; superoleophobicity; surface chemistry