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Surface modification of alumina membranes via a sol-gel process for antifouling properties

文献类型： 外文期刊

作者： Wang, Fei 1 ; Lee, Jongman 1 ; Ha, Jang-Hoon 1 ; Song, In-Hyuck 1 ;

作者机构： 1.Korea Inst Mat Sci KIMS, Powder & Ceram Div, 797 Changwondaero, Chang Won 51508, South Korea

2.Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Key Lab Trop Crop Prod Proc, Minist Agr, Zhanjiang 524001, Peoples R China

关键词： Ceramics;Sol-gel preparation;Surface modification;Antifouling

期刊名称：MATERIALS LETTERS （ 影响因子：3.423； 五年影响因子：3.003 ）

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收录情况： SCI

摘要： Alumina membranes were modified using a SiO2 sol-gel process to mitigate membrane fouling. The formation of a SiO2 coating layer resulted in slightly narrowed pore sizes and reduced pure water permeability. Due to low isoelectric points, SiO2-coated membranes have a strong negative surface charge (-130 mV at pH 6.5), which results in the presence of electrostatic repulsion forces against humic acid. The membranes with higher TEOS (tetraethyl orthosilicate) concentrations exhibited higher flux levels during membrane fouling procedures, while the pristine alumina membrane displayed the lowest flux. Thus, inorganic surface modification with amorphous SiO2 clearly enhances the antifouling properties of pristine alumina membranes. (C) 2016 Elsevier B.V. All rights reserved.

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