| 초록 |
The blend membranes of sulfonated poly(arylene ether ketone)s (sPAEK) with different IEC (ionic exchange capacity) were prepared. sPAEK with low IEC was introduced to reduce the methanol permeability through the membrane. Morphology, water uptake, proton conductivity and methanol permeability of the blend membranes were investigated by SEM, AFM, AC impedance spectroscopy and permeability measuring instrument. The cross-sections of blend membranes showed phase-separated morphologies. The phase separation between two components could be controlled by changing the drying condition and the type of solvent. The effect of phase-separated morphology on the properties of blend membranes was investigated. Blend membranes showed co-continuous morphology and showed better selectivity than Nafion due to the lowered methanol permeability. |
