Hierarchically engineered membrane surfaces with superior antifouling and self-cleaning properties

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• 作者：Xueting Zhao ; Wenjuan Chen ; Yanlei Su ; Wen Zhu ; Jinming Peng ; Zhongyi Jiang ; ^{zhyjiang@tju.edu.cn} ; Lu Kong ; Yafei Li ; Jiazhen Liu
• 关键词：Membrane ; Amphiphilic surface ; Antifouling ; Self-cleaning ; Water treatment
• 刊名：Journal of Membrane Science
• 出版年：2013
• 出版时间：15 August, 2013
• 年：2013
• 卷：441
• 期：Complete
• 页码：93-101
• 全文大小：1459 K

文摘

In nature, surfaces simultaneously possessing antifouling and self-cleaning properties allow living systems to sustain diverse functions. Integrating these features into synthetic surfaces will open a novel avenue to advanced surface-based or surface-governed technologies for medical, industrial, ocean, and environmental applications. In this study, we report in situ engineered porous membrane surfaces with hierarchical structure: the external membrane surfaces are covered with zwitterionic (hydrophilic) and low surface energy brushes, endowing the membranes with superior antifouling and self-cleaning abilities. The surface composition, hydrophilicity and surface energy are assessed for the valuation of the antifouling and self-cleaning potential of the membranes. When utilized for model wastewater treatment, the membrane fouling is exquisitely suppressed: permeation flux-decline is decreased to an ultralow level (less than 1 % ) and permeation flux recovery after simple hydraulic washing is retained at nearly 100 % . The present method can be extended to the construction and modification of a broad range surfaces.