期刊
WATER RESEARCH
卷 224, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2022.119052
关键词
Antifouling membrane; Oil/water separation; Zwitterionic polymer; Polydopamine; Self-cleaning
资金
- National Natural Science Foundation of China [21374087, 21774100]
- Key Research and Development Program of Shaanxi [2021SF-042]
In this study, highly durable and completely self-cleaning stainless steel mesh membranes were successfully fabricated for the separation of massive oil/water mixtures. The membranes exhibited high water filtration flux and separation efficiency, and could be operated for a long period of time without the need for additional cleaning.
The development of high-flux, durable and completely self-cleaning membranes is highly desired for separation of massive oil/water mixtures. Herein, differently crosslinked poly(2-methacryloyloxylethyl phosphorylcholine) (PMPC) brush grafted stainless steel mesh (SSM) membranes (SSM/PMPCs) were fabricated by integrating of mussel inspired universal adhesion and crosslinking chemistry with surface-initiated activators regenerated by electron transfer atom transfer radical polymerization (SI-ARGET-ATRP). The durability and self-cleaning performance of the prepared SSM membranes were evaluated by separating sticky crude oil/water mixtures in a continuous recycling dead-end filtration device. The water filtration flux driven by gravity reached 60,000 L center dot m(-2)center dot h(-1) with a separation efficiency of over 99.98%. Furthermore, zero-flux-decline was observed during a 5 h continuous filtration when assisted by mechanical stirring. More significantly, such a completely self-cleaning separation of the well crosslinked SSM/PMPC2 membrane under optimized flux and stirring conditions had been operated cumulatively for 190 h in 30 days without any additional cleaning. These significant advances are more promising for practical applications in crude oil-contaminated water treatments and massive oil/water mixture separation.
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