首页|Tuning the membrane rejection behavior by surface wettability engineering for an effective water-in-oil emulsion separation
Tuning the membrane rejection behavior by surface wettability engineering for an effective water-in-oil emulsion separation
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Membrane-based separation is a promising technology to eliminate water impurities from the oil phase.However,it remains a great challenge to separate water from highly emulsified viscous oil owing to the high stability of the water droplets in oil.Herein we report a surface wettability engineering on an alu-mina ceramic membrane to achieve an efficient separation of a water-in-oil(W/O)emulsion.Silanes with different carbon chain lengths and fluorinated status were introduced to endow the alumina membrane with different surface wettabilities.While all the modified membranes exhibited excellent separation of the W/O without Span 80(surfactant),the one with amphiphobic wettability and lowest surface energy failed to separate the Span 80 stabilized W/O.The presence of Span 80 reduced the interfacial tension of water droplets,making them easier to deform and penetrate the modified membrane with the lowest surface energy.It reveals that engineering proper surface wettability is the key to separating the oil and water phases.Besides,the modified membranes maintained decent separation performance and stability under long-term run separation of the emulsified W/O.
Yan Zou、Yin-Shuang Hu、Deng-Hui Tian、Hong Wu、Xiaoshu Lv、Guangming Jiang、Yu-Xi Huang
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Engineering Research Center for Waste Oil Recovery Technology and Equipment,Ministry of Education,Chongqing Technology and Business University,Chongqing 400067,China
School of Environmental Science and Engineering,Sun Yat-sen University,Guangzhou 510275,China
Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology(Sun Yat-sen University),Guangzhou 510275,China
Guangzhou Science and Technology PlanNational Natural Science Foundation of ChinaHighlevel talent research startup project of Chongqing Technology and Business University
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