Journal
JOURNAL OF POLYMER RESEARCH
Volume 24, Issue 10, Pages -Publisher
SPRINGER
DOI: 10.1007/s10965-017-1331-3
Keywords
Methanol permeation; Relative selectivity; Ionic liquid; Polymerized ionic liquid; Proton exchange membranes; Direct methanol fuel cell
Categories
Funding
- Liaoning Provincial Education Department [L20150166, L2013153]
- China Scholarship Council [201208210023]
- Fundamental Research Funds for the Doctoral of Liaoning Provincial Natural Science Foundation [20141126]
- Science and Technology Development Fund Project of Fushun city [20141115]
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Methanol permeation and conductivity of membrane materials are important factors to evaluate the feasibility of application as proton exchange membranes (PEMs) in direct methanol fuel cell (DMFC). The methanol permeation values of these composite membranes based on ionic liquids of trifluoroacetic propylamine (TFAPA) and the disubstituted imidazolium cations with different anions were summarized, and the methanol permeation behaviors were investigated in this work. Although these polymer/ionic liquid composite membranes displayed satisfactory conductivities, the relative selectivity values of conductivity to methanol permeability were lower than the value of Nafion (R) membrane. Moreover, polymerized ionic liquids (PILs) membranes showed the strong ability to hinder methanol permeation with a value around 10(-11) cm(2)/s at 10M methanol solution. The maximum relative selectivity value reached (2.23-1.76) x 10(6) S.s/cm(3) for PVC-MIMCl membrane, which was near two orders of magnitude higher than the reported 2.47 x 10(4) S.s/cm(3) for Nafion-117 membrane at 2 M methanol solution.
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