Janus Polyvinylidene Fluoride Membrane with Extremely Opposite Wetting Surfaces via One Single-Step Unidirectional Segregation Strategy

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	Janus Polyvinylidene Fluoride Membrane with Extremely Opposite Wetting Surfaces via One Single-Step Unidirectional Segregation Strategy
	Lin, Haibo; Tang, Chuyang Y.; Li, Tiantian; Liu, Fu; Zhang, Shaofei; Wang, Jianqiang
刊名	ACS APPLIED MATERIALS & INTERFACES
	2018
卷号	10 期号:29 页码:24947-24954
关键词	In-water Emulsions Oil/water Separation Efficient Separation Pickering Emulsions Oil Distillation Wettability Nanosheets Fabrics
英文摘要	Janus membranes with asymmetric wettability have attracted intense attention in oil/water separation, membrane distillation, liquid/fog collection, liquid diode, etc. Facile manipulation of the paradoxical wetting/antiwetting property on opposite surfaces of a 2D membrane is challenging. Different from most postmodification methods, herein, we propose one single-step unidirectional segregation strategy to fabricate a polymeric Janus membrane with extremely opposite wetting surfaces showing almost a 150 degrees contact angle difference for the first time. We achieved the unidirectional segregation of the hydrophilic copolymer poly(vinylpyrrolidone-vinyltriethoxysilane) in a polyvinylidene fluoride (PVDF) membrane during phase separation. A glycerol coating on the nonwoven fabric support locally limited the phase separation on the bottom surface, blocked the segregation of hydrophilic copolymer, and promoted the segregation to the top surface. Working collaboratively with the asymmetric micro-/nanostructure on both surfaces, the resulting Janus membrane exhibited a superhydrophilic top surface and a superhydrophobic bottom surface. The Janus PVDF membrane showed switchable separation performance and high separation efficiency for both oil-in-water emulsions and water-in-oil emulsions because of its anisotropic wettability compared with solely hydrophobic or hydrophilic PVDF membranes.
学科主题	Engineering ; Physics
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/17298]
专题	2018专题
推荐引用方式 GB/T 7714	Lin, Haibo,Tang, Chuyang Y.,Li, Tiantian,et al. Janus Polyvinylidene Fluoride Membrane with Extremely Opposite Wetting Surfaces via One Single-Step Unidirectional Segregation Strategy[J]. ACS APPLIED MATERIALS & INTERFACES,2018,10(29):24947-24954.
APA	Lin, Haibo,Tang, Chuyang Y.,Li, Tiantian,Liu, Fu,Zhang, Shaofei,&Wang, Jianqiang.(2018).Janus Polyvinylidene Fluoride Membrane with Extremely Opposite Wetting Surfaces via One Single-Step Unidirectional Segregation Strategy.ACS APPLIED MATERIALS & INTERFACES,10(29),24947-24954.
MLA	Lin, Haibo,et al."Janus Polyvinylidene Fluoride Membrane with Extremely Opposite Wetting Surfaces via One Single-Step Unidirectional Segregation Strategy".ACS APPLIED MATERIALS & INTERFACES 10.29(2018):24947-24954.