Novel zwitterion-silver nanocomposite modified thin-film composite forward osmosis membrane with simultaneous improved water flux and biofouling resistance property

作者：Qiu, Ming; He, Chunju^*

来源：Applied Surface Science, 2018, 455: 492-501.

DOI：10.1016/j.apsusc.2018.06.020

• Forward osmosis
• Zwiterrion
• Ag nanoparticle
• Nanocomposite
• Biofouling resistance

Conventional thin-film composite forward osmosis membrane suffers from serious biofouling problem when used for desalination and treating wastewater. However, reported improved strategies are difficult to keep a balance between fouling resistance and membrane performance. To address this challenge, this work presents a simple and efficient surface modification strategy to construct a zwitterion-silver nanocomposite structure via second interfacial polymerization of zwitterion and in situ synthesis of silver nanoparticles (Ag NPs), which improves the polyamide layer in terms of hydrophilicity and transport properties without adversely affecting the selectivity. In addition, the zwitterion-silver modified membrane exhibits significantly biofouling resistance due to the simultaneous improvement of antiadhesive and antimicrobial property. Furthermore, the zwitterion-silver modified membrane with regeneration ability shows a long-term anti-biofouling property. Compared with other reports, the zwitterion-silver nanocomposite modified membrane shows outstanding antifouling property (> 96% antimicrobial efficiency), high water flux and excellent selectivity, which highlights its potential for practical applications.

• 出版日期2018-10-15
• 单位东华大学