.... The triethylammonium salt of sulfonated polyimides was dissolved in m -cresol, and the solution was cast onto glass plates using a spin coater and dried at 120 ° C for 6 h. The flexible SPI-SXx membrane was detached from the glass plate, and then immersed into 1 M H 2 SO 4...

...Yen-Zen Wang; Ko-Shan Ho; Shinn-Dar Wu; Kuo-Huang Hsieh; Chi-Hung Lee A novel epoxy-based semi-interpenetrating polymer networks membrane (SPIX-EP40) as the proton exchange membrane was prepared by a flexible epoxy network with sulfonated polyimide. A series of sulfonated polyamic acid (SPAA) were...