Improving Fouling Resistance of Seawater Desalination Membranes via Surface Modification

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• 作者：Jong-Min LeeHyun-Woong LeeYeo-Jin KimHyung-Gyu ParkSung-Pyo HongJa-Young Koo
• 会议时间：2012-06-26
• 关键词：Seawater Reverse Osmosis Membrane ; Fouling resistance ; Surface modification ; Contact Angle ; Surface Energy
• 作者单位：Woongjin Chemical Co.,Ltd 287, Gongdan-Dong, Gumi-City, Kyungbuk, Korea 730-030
• 母体文献：2012青岛国际脱盐大会论文集
• 会议名称：2012青岛国际脱盐大会
• 会议地点：青岛
• 主办单位：中国金属学会
• 语种：chi
• 分类号：TV1;TG1

摘要

A commercial polyamide seawater reverse osmosis (SWRO) membrane (Woongjin Chemical CSM) was surface-modified with fluoro-compounds. The effect of this surface modification on both water and salt permeability before and after organic fouling was investigated. The structural and electrical characteristics of the membrane surface were measured using Atomic Force Microscopy (AFM) and Electrokinetic Analysis (EKA) respectively. When modified, the membrane surface showed only slight changes to the surface roughness and surface charges. The modified membrane also showed highly improved fouling resistance during cross-flow filtration of characteristic seawater organic foulants (humic acid and sodium alginate). Contact angle analysis using the Owens-Wendt theory was used to calculate the surface energy of the modified membrane. Lower surface energy of the modified membrane was identified as the key factor in the improved fouling resistance of the membranes.