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题名: Gas Permeation Property of 6FDA-mPDA and Its Asymmetric Hollow Fiber Membranes
作者: Ding Xiao-Li1, 2;  Cao Yi-Ming1;  Wang Li-Na1;  Zhao Hong-Yong1, 2;  Jie Xing-Ming1;  Yuan Quan1
关键词: Polyimide ;  Asymmetric hollow fiber membrane ;  Air gap ;  Physical aging
刊名: CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
发表日期: 2009-06-10
卷: 30, 期:6, 页:1240-1244
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: 2,2'-Bis ( 3,4-dicarboxyphenyl ) hexafluoropropane dianhydride ( 6FDA )-1, 3-phenylenediamine ( mPDA ) polyimide was synthesized by chemical imidization in a two-step procedure. The density of the polymer dense membrane, the fractional free volume and the glass transition temperature were measured. The ultra-thin hollow fiber membranes with a dense skin were fabricated with different air gap. The hollow fiber membranes have an O(2) permeance of 19. 10 GPU and a CO(2) permeance of 106. 34 GPU with the O(2)/N(2) selectivity of 5. 99 and the CO(2)/CH(4) selectivity of 82. 00 at 25 degrees C, 0. 5 MPa. The calculated thickness of the dense skin based on O(2) permeance is 96 nm. The temperature effect on the gas separation performance was investigated. The permeances of the O(2), N(2), CH(4) and CO(2) increase with an increase in temperature, while the selectivities of O(2)/N(2) and CO(2)/CH(4) decrease. The physical aging phenomenon of the asymmetric hollow fiber membranes spun with different air gap distances was investigated. The results show the permeance of the ultra-thin membranes sharply decreases and the selectivity increases. And the thickness of the dense skin affected the aging behavior.
关键词[WOS]: GLASSY POLYMER-FILMS ;  SEPARATION PERFORMANCE
语种: 英语
WOS记录号: WOS:000267873700036
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141527
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.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Ding Xiao-Li,Cao Yi-Ming,Wang Li-Na,et al. Gas Permeation Property of 6FDA-mPDA and Its Asymmetric Hollow Fiber Membranes[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2009,30(6):1240-1244.
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