Nano Composite Membranes of Sulfonated Poly(ether sulfone) Containing 4,4-Bis(4-hydroxylphenyl)valeric Acid and SiO2 for PEMFC
| Periodical | Materials Science Forum (Volume 695) |
|---|---|
| Main Theme | Eco-Materials Processing and Design XII |
| Edited by | Hyungsun Kim, Jian Feng Yang, Chuleol Hee Han, Somchai Thongtem and Soo Wohn Lee |
| Pages | 37-40 |
| DOI | 10.4028/www.scientific.net/MSF.695.37 |
| Citation | Young Don Lim et al., 2011, Materials Science Forum, 695, 37 |
| Online since | July, 2011 |
| Authors | Young Don Lim, Dong Wan Seo, Soon Ho Lee, Md. Monirul Islam, Hyun Mi Jin, Ho Hyoun Jang, Insuk Jeong, Whan Gi Kim |
| Keywords | Electrolyte, Fuel Cell, Membrane, Nanocomposite, PEM, PES, Polymer, SiO2, Sulfonation, Valeric Acid |
| Price | US$ 28,- |
Poly(ether sulfone)s (PES) containing 25-75 mol % valeric 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 1M 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. Composite membranes were prepared with copolymers and SiO2 nanoparticles(20 nm, 4-10 wt%). The composite membranes were cast from DMSO.A series of composite membranes 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.
