Composite Membrane with Underwater-Oleophobic Surface for Anti-Oil-Fouling Membrane Distillation

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	Composite Membrane with Underwater-Oleophobic Surface for Anti-Oil-Fouling Membrane Distillation
	Wang, Zhangxin; Hou, Deyin; Lin, Shihong
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2016-04-05
卷号	50 期号:7 页码:3866-3874
英文摘要	In this study, we fabricated a composite membrane for membrane distillation (MD) by modifying a commercial hydrophobic polyvinylidene fluoride (PVDF) membrane with a nanocomposite coating comprising silica nanoparticles, chitosan hydrogel and fluoro-polymer. The composite membrane exhibits asymmetric wettability, with the modified surface being in-air hydrophilic and underwater oleophobic, and the unmodified surface remaining hydrophobic. By comparing the performance of the composite membrane and the pristine PVDF membrane in direct contact MD experiments using a saline emulsion with 1000 ppm crude oil (in water), we showed that the fabricated composite membrane was significantly more resistant to oil fouling compared to the pristine hydrophobic PVDF membrane. Force spectroscopy was conducted for the interaction between an oil droplet and the membrane surface using a force tensiometer. The difference between the composite membrane and the pristine PVDF membrane in their interaction with an oil droplet served to explain the difference in the fouling propensities between these two membranes observed in MD experiments. The results from this study suggest that underwater oleophobic coating can effectively mitigate oil fouling in MD operations, and that the fabricated composite membrane with asymmetric wettability can enable MD to desalinate hypersaline wastewater with high concentrations of hydrophobic contaminants.
收录类别	SCI
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/36021]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Wang, Zhangxin,Hou, Deyin,Lin, Shihong. Composite Membrane with Underwater-Oleophobic Surface for Anti-Oil-Fouling Membrane Distillation[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2016,50(7):3866-3874.
APA	Wang, Zhangxin,Hou, Deyin,&Lin, Shihong.(2016).Composite Membrane with Underwater-Oleophobic Surface for Anti-Oil-Fouling Membrane Distillation.ENVIRONMENTAL SCIENCE & TECHNOLOGY,50(7),3866-3874.
MLA	Wang, Zhangxin,et al."Composite Membrane with Underwater-Oleophobic Surface for Anti-Oil-Fouling Membrane Distillation".ENVIRONMENTAL SCIENCE & TECHNOLOGY 50.7(2016):3866-3874.