期刊
JOURNAL OF MEMBRANE SCIENCE
卷 596, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2019.117583
关键词
PVDF-HFP tubular nanofiber membranes; Mussel-inspired chemistry; Underwater superoleophobicity; Dye degradation; Oil/water separation
资金
- National Natural Science Foundation of China [51673149, 51603146]
- industrial chain collaborative innovation major projects of the State Oceanic Administration [BHSF2017-01]
- Science and Technology Plans of Tianjin [15PTSYJC00240]
In this study, a novel and multifunctional polyvinylidene fluoride-co-hexafluompropyle (PVDF-HFP)/catecholpolyethyleneimine (CA-PEI)/Ag/3-glycidyloxy propyltrimethoxysilane (KH560) tubular nanofiber membrane (TNM) for applications in dye degradation and oil/water separation was fabricated. Firstly, the PVDF-HFP tubular nanofiber membranes were modified by using a mussel-inspired method. Then, Ag nanoparticles were assembled on the nanofiber surface to improve their excellent catalytic capacity for Methylene blue (MB) and Congo red (CR). Finally, the hydrophilic KH560 was grafted on nanofiber surface and the effects of KH560 concentration on the membrane performance were investigated. The results showed that when the KH560 concentration was 3 wt%, the modified membranes possessed a higher hydmphilicity and permeability. Meanwhile, it could also effectively separate various oil-in-water emulsions with high separation rate and separation efficiency at 0.02 MPa. Moreover, the catalytic and oil/water separation performances had no discernible decay after ten cycle tests, which promoted the potential application of modified PVDF-HFP TNMs for the treatment of practical oily wastewater.
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