Proton conducting blend membranes: physical,morphological and electronic properties |
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| Authors: | Amir?Al-Ahmed Mazen?Khaled?Nazal Email author" target="_blank">Abdullah?S?SultanEmail author Jimoh?K?Adewole Email author" target="_blank">Syed?Javaid?ZaidiEmail author |
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| Affiliation: | 1.Center of Research Excellence in Renewable Energy (CoRERE),King Fahd University of Petroleum and Minerals,Dhahran,Saudi Arabia;2.Chemistry Department,King Fahd University of Petroleum and Minerals,Dhahran,Saudi Arabia;3.Center for Integrative Petroleum Research,King Fahd University of Petroleum and Minerals,Dhahran,Saudi Arabia;4.QAFAC Chair, Center for Advanced Materials,Qatar University,Doha,Qatar |
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| Abstract: | Blend membranes of sulfonated poly(ether ether ketone) (SPEEK) and sulfonated polyetherimide (SPEI) have been prepared and investigated as a potential polymer electrolyte membrane (PEM) for direct methanol fuel cell (DMFC). Polymers were dissolved in N-methyl-2-pyrrolidone (NMP) in different mixing ratios and membranes were casted using a semi-automatic casting machine on a pre-cleaned glass plate. The influence of SPEI percentage on ion exchange capacity (IEC), water uptake, methanol permeability and proton exchange capacity have been investigated. Blend membranes showed slightly better IEC, water uptake and methanol crossover properties as compare to pure SPEEK; but proton conductivity was slightly lower than that of pure SPEEK membrane. Membrane morphology was investigated by FESEM, TGA and AFM. Overall, a homogeneous surface was observed for most of the blend membranes, with minor phase separation at higher SPEI contents samples. AFM image of the membrane surface shows nanoscale surface roughness. |
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