PBI-PPA/PTFE composite membranes preparation and applications to fuel cells

• Main Authors: Shih-Yuan Shen, 沈詩源
• Other Authors: Hsiu-Li Lin
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/70742759067911549632

碩士 === 元智大學 === 化學工程與材料科學學系 === 99 === In this study, we synthesize polybenzimidazole (PBI) from isophthalic acid and 3,3’-diaminobenzidine monomers using polyphosphoric acid (PPA) as a solvent. The polymer structures and molecular weight are investigated using FTIR spectroscopy and GPC. The porous polytetrafluoroethylene (PTFE) is used as a supporting membranes to reinforce the polymerized PBI–PPA blend and prepare PBI-PPA/PTFE composite membrane (thickness 40-55 µm). The PBI-PPA/PTFE composite membranes have been fabricated for 160 ℃high temperature proton exchange membrane fuel cells. PBI-PPA-963/PTFE composite membrane has a best performance of the max power density of 366 mW/cm2.