期刊
MEMBRANES
卷 12, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/membranes12040382
关键词
poly(ethylene-co-vinyl alcohol); electrospinning; nanofiber; membrane; oil; water separation
类别
资金
- National Research Foundation of Korea (NRF) - Korean government (Ministry of Science and ICT) [SI2111-40]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [201820101066550, 20202020800330]
In this study, hydrophilic poly(ethylene-co-polyvinyl alcohol) (EVOH) nanofiber membranes were fabricated using an electrospinning technique for highly efficient oil/water separation. The as-prepared nanofiber membranes exhibited super-hydrophilic property and were capable of continuously separating water-in-oil emulsions with high efficiency. Furthermore, these membranes showed high stability and can be reused in real field oil/water separation applications.
Fabrication of highly efficient oil/water separation membranes is attractive and challenging work for the actual application of the membranes in the treatment of oily wastewater and cleaning up oil spills/oil leakage accidents. In this study, hydrophilic poly(ethylene-co-polyvinyl alcohol) (EVOH) nanofiber membranes were made using an electrospinning technique for oil/water separation. The as-prepared EVOH electrospun nanofiber membranes (ENMs) exhibited a super-hydrophilic property (water contact angle 33.74 degrees) without further treatment. As prepared, ENMs can provide continuous separation of surfactant-free and surfactant-stabilized water-in-oil emulsions with high efficiency (i.e., flux 8200 L m(-2) h(-1) (LMH), separation efficiency: >99.9%). In addition, their high stability (i.e., reusable, mechanically robust) would broaden the conditions under which they can be employed in the real field oil/water separation applications. Various characterization techniques (including morphology investigation, pore size, porosity, mechanical properties, and performance test) for gravity-driven oil/water separation were employed to evaluate the newly prepared EVOH ENMs.
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