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An ultrathin, porous and in-air hydrophilic/underwater oleophobic coating simultaneously increasing the flux and antifouling property of membrane for membrane distillation
Sun, Weishi; Shen, Fei1; Wang, Zhaoshuai; Zhang, Yan; Wan, Yinhua
2018-11-01
Source PublicationDESALINATION
ISSN0011-9164
Volume445Pages:40-50
Abstract

Surface modification is a useful method to enhance the antifouling ability of membranes for membrane distillation (MD). However, current surface modification strategies often tend to sacrifice the membrane flux. In this work, we decorated a commercial hydrophobic polytetrafluoroethylene (PTFE) membrane by coating dopamine (DA) alone. A unique surface coating being ultrathin, porous, and in-air hydrophilic/underwater oleophobic was constructed, which simultaneously increased the flux and fouling resistance of the PTFE membrane in MD desalination. When treating a 3.5 wt% NaCl aqueous solution at 70 degrees C through vacuum MD (VMD), compared with the pristine PIPE membrane flux of 28.8 kg/m(2).h, the flux of the modified membrane 0.5DA@PTFE-4 reached 89.6 kg/m(2).h, and the flux increased by 210%. Continuous VMD operations demonstrated that the 0.5DA@PTFE-4 membrane held a higher resistance to scaling than the pristine one. Moreover, the pristine PTFE membrane was incompetent to tackle an oily saline via VMD, showing an immediate membrane fouling and wetting. The 0.5DA@PTFE-4 membrane, however, exhibited a significant improvement in oil fouling resistance, rendering the VMD desalination process viable for more than 30 h. The findings in this work provided a new insight to develop the robust membrane with high performance used for MD.

KeywordSurface Modification Dopamine Coating Membrane Distillation Fouling
DOI10.1016/j.desal.2018.07.026
Language英语
WOS KeywordDirect-contact Membrane ; Hollow-fiber Membranes ; Polydopamine Deposition Conditions ; Surface Modification ; Aqueous-solution ; Composite Membranes ; Fouling Resistance ; Desalination ; Layer ; Separation
Funding ProjectNational Natural Science Foundation of China[21106153] ; Solar Energy Initiative of the Chinese Academy of Sciences[KGCX2-YW-380] ; National High-Tech R&D Program of China[2012AA021202] ; National High-Tech R&D Program of China[2014AA021005]
WOS Research AreaEngineering ; Water Resources
WOS SubjectEngineering, Chemical ; Water Resources
Funding OrganizationNational Natural Science Foundation of China ; Solar Energy Initiative of the Chinese Academy of Sciences ; National High-Tech R&D Program of China
WOS IDWOS:000446287300005
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/26256
Collection中国科学院过程工程研究所
Corresponding AuthorShen, Fei
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Sun, Weishi,Shen, Fei,Wang, Zhaoshuai,et al. An ultrathin, porous and in-air hydrophilic/underwater oleophobic coating simultaneously increasing the flux and antifouling property of membrane for membrane distillation[J]. DESALINATION,2018,445:40-50.
APA Sun, Weishi,Shen, Fei,Wang, Zhaoshuai,Zhang, Yan,&Wan, Yinhua.(2018).An ultrathin, porous and in-air hydrophilic/underwater oleophobic coating simultaneously increasing the flux and antifouling property of membrane for membrane distillation.DESALINATION,445,40-50.
MLA Sun, Weishi,et al."An ultrathin, porous and in-air hydrophilic/underwater oleophobic coating simultaneously increasing the flux and antifouling property of membrane for membrane distillation".DESALINATION 445(2018):40-50.
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