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Robust and Thermally Stable Butterfly-Like Co(OH)2/Hexadecyltrimethoxysilane Superhydrophobic Mesh Filters Prepared by Electrodeposition for Highly Efficient Oil/Water Separation

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journal contribution
posted on 10.05.2019, 00:00 authored by Zhongde Wang, Wei Kong, Lianxi Si, Junjian Niu, Ye Liu, Longping Yin, Zhigang Tian
A superhydrophobic and superoleophilic material-modified stainless-steel (SS) mesh filter was successfully fabricated by the deposition of hierarchical butterfly-like micro/nanostructured Co­(OH)2 on the SS mesh with the unipolar pulse electrodeposition method, followed by modification with hexadecyltrimethoxysilane (HDTMS) and applied to the separation of hot and corrosive oil/water mixtures. The obtained Co­(OH)2/HDTMS SS mesh filter exhibited both superhydrophobicity (water contact angle as high as 157.9°) and superoleophilicity (oil contact angle of 0°) and excellent performance for the separation of oil/water mixtures under high temperature (up to 160 °C) and corrosive and ultrasonic conditions with long-term storage and reusability. It is expected that the present fabrication process could be applied to tuning the robust and thermally stable micro/nanostructures on the porous substrates for the oil/water separation under harsh conditions.