A Superamphiphobic Coating with an Ammonia-Triggered Transition to Superhydrophilic and Superoleophobic for Oil-Water Separation

作者：Xu, Zhiguang; Zhao, Yan^*; Wang, Hongxia; Wang, Xungai; Lin, Tong

来源：Angewandte Chemie - International Edition, 2015, 54(15): 4527-4530.

DOI：10.1002/anie.201411283

• hydrophobic effects
• oil-water separation
• porous materials
• superoleophobicity
• surface chemistry

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.

• 出版日期2015-4-7