| 초록 |
The problem of methanol crossover through Nafion® membranes is one of the challenges in the application of direct methanol fuel cells. In order to reduce methanol crossover, sulfonated polyimides/PEGDA semi-IPN were prepared. This new membrane was synthesized from 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTDA), 4,4’-diaminobiphenyl 2,2’-disulfonic acid (BDSA), 2-bis [4-(4-aminophenoxy)phenyl] hexafluoropropane (HFBAPP) and another non sulfonated diamine, 1,10-decamethylenediamine (DMD). These sulfonated polyimides were blended with the PEGDA having ethylene oxide group in the main chain. Various sulfonated polyimides/PEGDA semi-IPN having different molar ratio of sulfonic acid group and ethylene oxide group are synthesized and successfully characterized for ion exchange capacity (IEC), methanol sorption behavior, proton conductivity and methanol permeability. |
