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题名: Study on hypochlorite degradation of aromatic polyamide reverse osmosis membrane
作者: Kang, Guo-Dong;  Gao, Cong-Jie;  Chen, Wei-Dong;  Jie, Xing-Ming;  Cao, Yi-Ming;  Yuan, Quan
关键词: polyamide membrane ;  degradation mechanism ;  chlorine resistance ;  surface coating
刊名: JOURNAL OF MEMBRANE SCIENCE
发表日期: 2007-08-15
DOI: 10.1016/j.memsci.2007.05.025
卷: 300, 期:1-2, 页:165-171
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology ;  Physical Sciences
类目[WOS]: Engineering, Chemical ;  Polymer Science
研究领域[WOS]: Engineering ;  Polymer Science
英文摘要: A serious limitation of most commercial polyamide reverse osmosis (RO) membranes is their sensitivity to chlorine attack. By studying the hypochlorite degradation of aromatic polyamide RO membrane, this work was to get some understandings in the prevention of membrane depreciation and develop membranes with improved chlorine resistance. Membrane performances, including water flux and salt rejection, were evaluated before and after hypochlorite exposure under different pH and concentration conditions. The results showed that chlorination destroyed hydrogen bonds in polyamide chains, causing a notable decline of membrane flux especially in acid environment; however, membrane performance was slightly improved after the treatment of alkaline hypochlorite solution for a certain time, which was probably due to the effect of amine groups in barrier layer. Based on the attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) characterizations and performance measurements, the results indicated that N-chlorination reaction of aromatic polyamide was also reversible, ill other words, the N-chlorinated intermediate could be regenerated to initial amide with the alkaline treatment before ring-chlorination reaction. This conclusion provided several relative suggestions for membrane cleaning procedures. Finally, a method adopting surface coating was proposed to develop membranes with good chlorine resistance, and the preliminary results showed its potential for applications. (C) 2007 Elsevier B.V. All rights reserved.
关键词[WOS]: OXIDATIVE-DEGRADATION ;  INFRARED TEMPERATURE ;  SURFACE MODIFICATION ;  CHLORINE ;  POLYMERS ;  PERFORMANCE
语种: 英语
WOS记录号: WOS:000249569000023
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140582
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.SOA, Dev Ctr Water Treatment Technol, Hangzhou 310012, Peoples R China
4.Tianjin Zenith Engn & Consultat Co Ltd, Tianjin 300384, Peoples R China

Recommended Citation:
Kang, Guo-Dong,Gao, Cong-Jie,Chen, Wei-Dong,et al. Study on hypochlorite degradation of aromatic polyamide reverse osmosis membrane[J]. JOURNAL OF MEMBRANE SCIENCE,2007,300(1-2):165-171.
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