Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 580, Issue -, Pages 211-222Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.07.027
Keywords
Superhydrophobicity; Oil/water separation; Surface engineering; Hierarchical structure
Categories
Funding
- National Natural Science Foundation of China [51903115]
- Nature Science Foundation of the Jiangxi Province [20192BAB203012]
- Scientific and Technologial Innovation Programs of Higher Education Institutions in Shanxi (STIP) [2020L0477]
- Shanxi 1331 projectfoundation for the construction of collaborative innovation center of graphene industrial application
- Shanxi Province Science and Technology Key Project [201703D121037-2]
- Datong City Science and Technology Research Project [20180818]
- Sixth Academy of China Aerospace Science and Industry Corp [359]
- Project of Shandong Province Higher Educational Science and Technology Program [J18KA029]
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Various oils discharged from daily life and industrial production, as well as frequent oil spillages, have led to severe water pollution and ecological problems. Mussel-inspired polydopamine has been widely applied for fabrication of superhydrophobic materials for oil/water separation. However, the need of additional nanoparticles via tedious steps to construct nanostructures, and the high cost of dopamine itself limit its practical applications. Moreover, the application modes of superhydrophobic materials for oil/water separation are monotonous, which will limit the applied range of the superhydrophobic materials. For example, superhydrophobic sponge was usually used for adsorbing oil droplets or oil spills from water, while superhydrophobic fabric or mesh was usually used for separating bulk layered oil/water mixture. Therefore, developing simple and low-cost mussel-inspired surface modification strategy toward superhydrophobic materials, as well as diverse application modes for oil/water separation, is still highly desired. In this study, superhydrophobic sponge and fabric with nanostructures, which exhibits excellent performance for diverse oil/water separation, have been fabricated through a novel one-step and cost-effective mussel-inspired approach. The resultant superhydrophobic sponge exhibits outstanding oil absorption capability (weight gains up to 8860%), while the superhydrophobic fabric can effectively separate oil/water mixture. Moreover, diverse modes for oil/water separation have been developed for the first time. For example, water-in-oil emulsion can be highly-efficient separated by a compressed superhydrophobic sponge (similar to 1800L m(-2)h (1) bar (1) for water-in-oil emulsion, and above 99% rejection rate for water droplets), while crude oil spills can be efficiently collected by a superhydrophobic boat (above 98%). (C) 2020 Elsevier Inc. All rights reserved.
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