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dc.contributor.authorZhong, GMzh_CN
dc.contributor.authorLiu, ZGzh_CN
dc.contributor.authorLi, Tzh_CN
dc.contributor.authorCheng, Hzh_CN
dc.contributor.authorYu, SSzh_CN
dc.contributor.authorFu, RQzh_CN
dc.contributor.authorYang, Yzh_CN
dc.contributor.author杨勇zh_CN
dc.date.accessioned2013-12-12T02:12:44Z
dc.date.available2013-12-12T02:12:44Z
dc.date.issued2013-02-01zh_CN
dc.identifier.citationJournal of Membrane Science, 2013,428212-217zh_CN
dc.identifier.issn0376-7388zh_CN
dc.identifier.otherWOS:000313653700026zh_CN
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/62311
dc.description.abstractThe states of methanol in proton exchange membranes are considered to have a significant influence on the methanol permeability of membranes for direct methanol fuel cells, however, they have been rarely studied in the literature. Herein, we use high-resolution H-1 solid-state magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy to identify the microenvironment of methanol molecules in sulfonated poly(phenylene ether ether sulfone) (sPEES) and Nafion117 membranes. Our results show that the majority of methanol molecules are bound with the backbone of sPEES, while almost all of the methanol molecules in Nafion are in the "free" state. In particular, both the -OH and -CH3 of the bound methanol molecules interact with the polymer within sPEES. It demonstrates the existence of a larger amount of bound methanol molecules and stronger interaction between methanol molecules and the background of polymer within sPEES membranes compared to that in Nafion. Such results allow us to understand the mechanism of the low methanol permeability associated with sPEES as opposed to Nafion. (C) 2012 Elsevier B.V. All rights reserved.zh_CN
dc.language.isoen_USzh_CN
dc.source.urihttp://dx.doi.org/10.1016/j.memsci.2012.10.026zh_CN
dc.subjectSolid-state NMRzh_CN
dc.subjectSulfonated poly(ether ether sulfone)zh_CN
dc.subjectNafionzh_CN
dc.subjectDirect methanol fuel cell (DMFC)zh_CN
dc.subjectStates of methanolzh_CN
dc.titleThe states of methanol within Nafion and sulfonated poly(phenylene ether ether sulfone) membraneszh_CN
dc.typeArticlezh_CN


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