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Facile fabrication of durable superhydrophobic fabrics by silicon polyurethane membrane for oil/water separation

Chinese Journal of Chemical Engineering 2023年第3期55卷 73-83页

作者： Taoyan Mao Runhui Xiao Peng Liu Jiale Chen Junqiang Luo Su Luo Fengwei Xie Cheng Zheng School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Guangdong Debao Environmental Technology Research Co.Ltd Guangzhou 510300China School of Engineering Newcastle UniversityNewcastle upon Tyne NE17RUUnited Kingdom Guangzhou Vocational College of Science and Technology Guangzhou 510550China

Nowadays, oil contamination has become a major reason for water pollution, and presents a global environmental challenge. Although many efforts have been devoted to the fabrication of oil/water separation materials, their practical applications are still hindered by their weak durability, poor chemical tolerance,environmental resistance, and potential negative impact on health and the environment. To overcome these drawbacks, this work offers a facile method to fabricate the eco-friendly and durable oil/water separation membrane fabrics by alkaline hydrolysis and silicon polyurethane coating. The X-ray photoelectron spectroscopy, scanning electron microscopy, and atomic force microscopy results demonstrate that silicon polyurethane membrane could be coated onto the surface of hydrolyzed polyester fabric and form a micro-/nano-scaled hierarchical structure. Based on this, the modified fabric could have a stable superhydrophobic property with a water contact angle higher than 150°, even after repeated washing and mechanical abrasion 800 times, as well as chemical corrosion. Moreover, the modified fabrics show excellent oil/water separation efficiency of up to 99% for various types of oil–water mixture. Therefore, this durable, eco-friendly and cost-efficient superhydrophobic fabric has great potential in large-scale oil/water separation.

关键词： superhydrophobic fabrics Silicon polyurethane membrane Durability Separation Polymers Waster water

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