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Environmentally friendly kaolin-coated meshes with superhydrophilicity and underwater superoleophobicity for oil/water separation

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成果类型:
期刊论文
作者:
Wang, Yujie;Luo, Si;Chen, Anwei;Shang, Cui;Peng, Liang;Shao, Jihai;Liu, Zhangyang
作者机构:
[Liu, Zhangyang; Luo, Si; Wang, Yujie; Peng, Liang; Shang, Cui; Shao, Jihai; Chen, Anwei] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
[Liu, Zhangyang; Wang, Yujie] Hunan Agr Univ, Int Coll, Changsha 410128, Peoples R China.
语种:
英文
关键词:
Underwater superoleophobic;Kaolin;Oil/water separation;Hierarchical structure;Emulsion
期刊:
SEPARATION AND PURIFICATION TECHNOLOGY
ISSN:
1383-5866
年:
2020
卷:
239
页码:
116541-
基金类别:
National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [51879105]; Hunan Provincial Natural Science Foundation of ChinaNatural Science Foundation of Hunan Province [2019JJ40128]; Research Foundation of Education Bureau of Hunan Province, China [18B095]; Changsha Plan Project of Science and Technology [kq1801025]
机构署名:
本校为第一机构
院系归属:
资源环境学院
国际学院
摘要:
Due to the increase in oil spill accidents and discharge of oily wastewater, it is urgent to develop functional materials to separate oil from oil/water mixtures. In this work, the kaolin-coated meshes were fabricated by a facile coating method to construct a micro-hierarchical surface and controllable pore size for the separation of various oil/water mixtures. The obtained meshes exhibits super-hydrophilicity, underwater super-oleophobicity with underwater oil contact angle > 150 degrees and outstanding oil/water separation efficiency above 99% and flux up to 190 L m(-2) h(-1) under gravity force. Moreover, the mesh still maintained high stability and good separation efficiency under corrosive condition and recycling. Furthermore, the mesh can also remove water from the water-in-oil emulsion. Results from this study are meaningful for the development of low-cost, and eco-friendly materials with high efficiency and mechanical robustness for oily wastewater treatment and open a new way for high-increment utilization of kaolin mineral.

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