Preparation and Properties of Sulfonated Poly(ether Sulfone)s Containing BFBN for PEMFC

ABSTRACT Sulfonated poly (ether sulfone)s containing BFBN were prepared from 2,3-bis(4- fluorophenyl)-2-butenedinitrile , 4,4-sulfonyldiphenol and sulfonated 4,4’-difluorodiphenylsulfone sodium salt using potassium carbonate, and followed acidification reaction with 1M H 2 SO 4 . BFBN was prepared from 4-fluorobenzylcyanide, CCl 4 , NaOH using trimethylbenzylammoniumchloride . Sulfonated poly(ether sulfone)s containing BFBN were studied by FT-IR, 1 H-NMR spectroscopy, and thermo gravimetric analysis (TGA). The water uptake of synthesized S-PBFBN membranes exhibit 31~62% compared with 28% of Nafion 211. The S-PBFBN membranes exhibit proton conductivities (80°C, RH 100) of 53.8~ 117.4 mS/cm compared with 137.4 mS/cm of Nafion 211.KEY WORDS :PEMFC( 고분자 전해질 막 연료전지), Fuel cell(연료전지), Polymer electrolyte membrane (고분자 전해질 막), Sulfonation(술폰화) 한국수소 및 신에너지학회 논문집(2011. 10), 제22권 제5호Trans. of the Korean Hydrogen and New Energy Society(2011. 10), Vol. 22, No. 5, pp. 579~584