Nano Composite Membranes of Sulfonated Poly(ether sulfone) Containing 4,4-Bis(4-hydroxylphenyl)valeric Acid and SiO2 for PEMFC

Abstract:

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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 °C. 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.

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Periodical:

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:

Y. D. Lim et al., "Nano Composite Membranes of Sulfonated Poly(ether sulfone) Containing 4,4-Bis(4-hydroxylphenyl)valeric Acid and SiO2 for PEMFC", Materials Science Forum, Vol. 695, pp. 37-40, 2011

Online since:

July 2011

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$35.00

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