Preparation and characterization of anti-fouling ¦Â-cyclodextrin/polyester thin film nanofiltration composite membrane

详细信息    查看全文

• 作者：Huiqing Wu ; Beibei Tang ; ^{bbtang@fudan.edu.cn} ; Peiyi Wu ; ^{peiyiwu@fudan.edu.cn}
• 关键词：¦Â-cyclodextrin ; Interfacial polymerization ; Nanofiltration ; Anti-fouling
• 刊名：Journal of Membrane Science
• 出版年：2013
• 出版时间：1 February, 2013
• 年：2013
• 卷：428
• 期：Complete
• 页码：301-308
• 全文大小：1836 K

文摘

Novel ¦Â-cyclodextrin (¦Â-CD)/polyester thin film nanofiltration composite membranes were prepared via in situ interfacial polymerization of trimesoyl chloride (TMC) and triethanolamine (TEOA) in the presence of ¦Â-CD. The effects of the concentration and pendant group of ¦Â-CD on the separation, morphology and anti-fouling performance of NF composite membrane were investigated. The results show that introducing an appropriate amount of ¦Â-CD into membrane effectively improves the membrane performance. When the concentration of ¦Â-CD is 1.8 % (w/v) in the aqueous phase, the water flux of NF composite membrane reaches a value which is almost two times that of the bare polyester membrane, while maintaining the rejection to Na₂SO₄ at a relative high level. The NF composite membrane exhibits a remarkable increase in the negative charge density and salt rejection by the incorporation of sulfated ¦Â-CD (s¦Â-CD) which possesses sulfonic acid groups as pendant groups instead of hydroxyls. Furthermore, the ¦Â-CD/polyester NF composite membrane also presents a significant enhancement in the anti-fouling performance. Therefore, ¦Â-CD can be considered as a potential additive to improve the property of nanofiltration composite membrane.