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题名: Gas Permeation Properties of Poly(2,5-benzimidazole) Derivative Membranes
作者: Jiang, Can1, 2, 3;  Jie, Xingming1, 2;  Kang, Guodong1, 2;  Liu, Dandan1, 2;  Cao, Yiming1, 2;  Yuan, Quan1, 2
关键词: membranes ;  separation techniques ;  polycondensation ;  thermal properties ;  mechanical properties
刊名: JOURNAL OF APPLIED POLYMER SCIENCE
发表日期: 2014-06-15
DOI: 10.1002/app.40440
卷: 131, 期:12
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: In this article, three novel polymers based on poly(2,5-benzimidazole) (ABPBI) were synthesized by introducing propyl, isobutyl or n-butyl groups to its side chain through an alkyl substitution reaction. FTIR and C-13 NMR were applied to confirm the formation of corresponding chemical groups. Their physical properties including crystallinity, thermal stability, mechanical strength, and micro-morphology were also characterized. Their solubility in common solvents were also tested to see if the modification will bring any improvement. Gas permeation properties of three derivative membranes prepared by a casting and solvent-evaporation method were tested with pure gases including H-2, N-2, O-2,O- CH4, and CO2. It has been revealed that gas with a smaller molecular size owned a larger permeability. This means gas permeation in all prepared membranes should be diffusivity selective. Among all three modified ABPBI membranes, isobutyl substitution modified ABPBI (IBABPBI) showed the best selectivity of H-2 over other gases such as N-2 (approximate to 185) and CO2 (approximate to 6.3) with a comparable permeability (approximate to 9.33 barrer) when tested at 35 degrees C and 3.0 atm. Testing temperature increase facilitated gas permeation for all three membranes obviously; while in term of gas selectivity temperature increase showed diverse alteration because it brought variable impact on gas solubility of different gases. Even so, IBABPBI membrane still owned acceptable selectivity of H-2 over N-2 (approximate to 118) and CO2 (approximate to 6.3) with an almost doubled permeability (approximate to 17.5 barrer) when tested at 75 degrees C and 3.0 atm. Additional tests showed that running at high pressure did not bring any obvious deterioration to gas separation performance of IBABPBI membrane. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40440.
关键词[WOS]: TRANSPORT PROPERTIES ;  HYDROGEN SEPARATION ;  POLYIMIDE MEMBRANES ;  ABPBI ;  PERMEABILITY ;  COPOLYIMIDES ;  BLEND
语种: 英语
WOS记录号: WOS:000333614300032
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145469
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.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Jiang, Can,Jie, Xingming,Kang, Guodong,et al. Gas Permeation Properties of Poly(2,5-benzimidazole) Derivative Membranes[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2014,131(12).
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