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Superhydrophobic micro/nanostructured copper mesh with self-cleaning property for effective oil/water separation
FeipengJiao
作者单位E-mail
FeipengJiao Department of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China jiaofp@163.com 
摘要:
In recent years, separating membranes with super wettability have been widely used to dispose the increasing oily sewage and frequent industrial oil spill accidents all over the world. In our work, a simple method to successful fabricated superoleophilic and superhydrophobic N-dodecyltrimethoxysilane @ tungsten trioxide coated copper mesh. The as-fabricated copper mesh displayed prominent superoleophilicity and superhydrophobicity with a huge water contact angle (WCA) about 154.39° and oil contact angle (OCA) near 0°. Moreover, the coated copper mesh showed high separation efficiency approximately 99.3%, and huge water ?ux about 9962.3 L h?1m?2, which was used to separate various organic solvents/water mixtures. Furthermore, the coated copper mesh showed favorable stability that the separation e?ciency remained above 90% after 10 separation cycles. Benefiting from the excellent photocatalytic degradation ability of tungsten trioxide, the coated copper mesh possessed the self-cleaning capacity. Therefore, the mesh contaminated with lubricating oil could regain superhydrophobic property, and this property of self-cleaning was permitted the fabricated copper mesh could repeatedly use for oil and water separation. In short, these merits of coated copper mesh have huge potentials to apply for practical oil/water separation.
关键词:  Superhydrophobicity  Micro/nanostructure  Tungsten trioxide  Self-cleaning  Oil/water separation
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Superhydrophobic micro/nanostructured copper mesh with self-cleaning property for effective oil/water separation
FeipengJiao
Abstract:
In recent years, separating membranes with super wettability have been widely used to dispose the increasing oily sewage and frequent industrial oil spill accidents all over the world. In our work, a simple method to successful fabricated superoleophilic and superhydrophobic N-dodecyltrimethoxysilane @ tungsten trioxide coated copper mesh. The as-fabricated copper mesh displayed prominent superoleophilicity and superhydrophobicity with a huge water contact angle (WCA) about 154.39° and oil contact angle (OCA) near 0°. Moreover, the coated copper mesh showed high separation efficiency approximately 99.3%, and huge water ?ux about 9962.3 L h?1m?2, which was used to separate various organic solvents/water mixtures. Furthermore, the coated copper mesh showed favorable stability that the separation e?ciency remained above 90% after 10 separation cycles. Benefiting from the excellent photocatalytic degradation ability of tungsten trioxide, the coated copper mesh possessed the self-cleaning capacity. Therefore, the mesh contaminated with lubricating oil could regain superhydrophobic property, and this property of self-cleaning was permitted the fabricated copper mesh could repeatedly use for oil and water separation. In short, these merits of coated copper mesh have huge potentials to apply for practical oil/water separation.
Key words:  Superhydrophobicity  Micro/nanostructure  Tungsten trioxide  Self-cleaning  Oil/water separation