Preparation and Characterization of Sulfonated Poly(ether sulfone) Using 4,4-Bis(4-hydrozylphenyl)valeric acid for Proton Ezchange Membrane Fuel cell Application
Poly(ether sulfone)s (PES) containing 25-75 mol % valerie acid were prepared with bisphenol A, bis(4-chlorophenyl)sulfone and 4,4-Bis(4-hydroxylphenyl)valeric acid using potassium carbonate in DMAc (dimethylacetamide) at 160 ℃. Copolymers containing carboxylacid group were reduced to hydroxy group by BH3 solution IM in THF and NaBH4 co-catalyst.Sulfonated poly(ether sulfone)s (S-PES) were obtained by reaction of 1,3-propanesultone and the reduced copolymer (PES-OH) with potassium t-butoxide. A series of copolymers were studied by 1H-NMR spectroscopy, differential scanning calorimetry (DSC), and thermo gravimetric analysis (TGA). Sorption experiments were conducted to observe the interaction of sulfonated polymers with water and methanol. The S-PES membranes exhibited proton conductivities from 1.20×10-3to 3.40×10.3 S/cm, water swell from 12.25 to 31.50 %, IEC from 0.43 to 0.72 meq/g and methanol diffusion coefficients from 3.60×10-7 tO 4.90×10-7 cm2/S at 25 ℃.
fuel cell membrane proton ezchange membrane poly(ether sulfone) fuel cell
Dong-Wan Seo Young-Don Lim M.S.Islam Mollah Soon-Ho Lee Sang-Ho Moon Sang-Young Pyun Whan-Gi Kim
Department of Applied Chemistry/RIC-ReSEM, Konkuk University, Chungju, Korea Department of Animal Science, Konkuk University, Chungju, Korea Department of Chemistry, Pukyong National University, Pusan, Korea
国际会议
10th International Symposium on Eco-Materials Processing and Design(第10届国际生态材料加工与设计研讨会)
西安
英文
73-76
2009-01-13（万方平台首次上网日期，不代表论文的发表时间）