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题名: Effect of hypochlorite concentration on properties of posttreated outer-skin ultrafiltration membranes spun from cellulose acetate/poly(vinyl pyrrolidone) blends
作者: Qin, JJ;  Cao, YM;  Li, Y
关键词: ultrafiltration ;  membranes ;  blends ;  hypochlorite treatment ;  morphology
刊名: JOURNAL OF APPLIED POLYMER SCIENCE
发表日期: 2005-07-05
DOI: 10.1002/app.21756
卷: 97, 期:1, 页:227-231
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Polymer Science
研究领域[WOS]: Polymer Science
英文摘要: An outer-skin hollow-fiber ultrafiltration (UF) membrane was spun from a new dope solution containing cellulase acetate (CA)/poly(vinyl pyrrolidone) (PVP 360K)/N-methyl-2-pyrrolidone (NMP)/water using a wet-spinning technique. The as-spun fibers were posttreated with a hypochlorite solution over a range of concentrations for a fixed period of 24 h. The experimental results showed that the pure water flux of the treated membrane increased with increasing hypochlorite concentration. The treated membrane experienced an increased fouling tendency with increasing hypochlorite concentration because the hydrophilicity of the treated membrane decreased as a result of the removal of PVP contents in the membrane matrix after hypochlorite treatment. SEM images revealed that the membrane had an outer dense skin, a porous inner surface, and a spongelike structure, which confirmed that addition of PVP favored the suppression of macrovoids in the membrane. The rnembrane pore size could be significantly increased when the hypochlorite concentration reached 200 mg/L. It was concluded that hypochlorite treatment provided an additional option to easily alter the pore size of UF membranes. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 227-231, 2005.
关键词[WOS]: HOLLOW-FIBER MEMBRANES ;  PERFORMANCE ;  SEPARATION ;  MORPHOLOGY ;  FLUX
语种: 英语
WOS记录号: WOS:000229066800028
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139917
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.Singapore Utilities Int Pte Ltd, Ctr Adv Water Technol, Singapore 637723, Singapore
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
3.Innovat Ctr, Inst Environm Sci & Engn, Singapore 637723, Singapore

Recommended Citation:
Qin, JJ,Cao, YM,Li, Y. Effect of hypochlorite concentration on properties of posttreated outer-skin ultrafiltration membranes spun from cellulose acetate/poly(vinyl pyrrolidone) blends[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2005,97(1):227-231.
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