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题名: Linear sulfonated polyimides containing polyhedral oligomeric silsesquioxane (POSS) in main chain for proton exchange membranes
作者: Gong, CL(宫琛亮); Zhang, Shujiang
收录类别: SCIE ; EI
出版日期: 2015-09-20
刊名: Journal of Power Sources
卷号: 2015, 期号:290, 页码:42-52
英文摘要: Linear sulfonated polyimides (SPI's) incorporating a difunctional POSS unit, namely Phenyl8bisaniline-POSS, in the backbone of the main chain at concentration levels of 3, 5 and 10 mol% yield proton exchange membranes. Compared with other POSS hybrid membranes fabricated by direct blending or cross-linking methods, the ultrafine POSS aggregates show more uniform distribution and the obtained SPI-POSS co-polymers exhibit dramatically enhanced comprehensive properties as proton exchange membranes. The results reveal that the POSS in the SPI main chain facilitates the dispersion of POSS as a nano-filler and increases the confined bound water molecules within the formation of continuous proton transformation channels, thereby increasing the proton conductivity in comparison with the plain SPI without POSS. For example, the POSS-SPI membranes with 5 and 10 mol% POSS show higher conductivity in comparison to the POSS free SPI (0.114 and 0.132 S cm-1vs. 0.0998 S cm-1) at 80 °C. Moreover, the obtained POSS-SPI membranes also process enhanced oxidative and hydrolytic stabilities, low swelling ratio combined with high water uptake, adequate thermal stability and mechanical properties, as well as low methanol permeability. © 2015 Elsevier B.V. All rights reserved.
关键词: Membranes ; Blending ; Chains ; Crosslinking ; Mechanical permeability ; Mechanical properties ; Molecules ; Oligomers ; Polyimides ; Bound water molecules ; Comprehensive properties ; Hydrolytic stability ; Low methanol permeability ; Polyhedral oligomeric silsesquioxanes ; Proton exchange membranes ; Sulfonated polyimides ; Uniform distribution
作者部门: 兰州大学化学化工学院
DOI: 10.1016/j.jpowsour.2015.04.174
WOS记录号: WOS:000356550900006
EI记录号: 20151900835008
IR记录号: 20151900835008
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/107411
Appears in Collections:化学化工学院_期刊论文

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Recommended Citation:
Gong, Chenliang,Zhang, Shujiang. Linear sulfonated polyimides containing polyhedral oligomeric silsesquioxane (POSS) in main chain for proton exchange membranes[J]. Journal of Power Sources,2015,2015(290):42-52.
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