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05월 20일 18시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능
제125회 대한화학회 학술발표회 및 총회
HyperBranched Anion Exchange Membranes with Improved Mechanical Properties for Fuel Cells
2020년 5월 20일 14시 31분 21초
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Sang Hee Kim
, Dong Jin Yoo
Energy Storage/Conversion Engineering, Jeonbuk National University, Korea
Life Science, Jeonbuk National University, Korea
Anion exchange membrane fuel cells(AEMFCs) have attracted considerable attention due to using non-platinum catalysts (such as Co, Ni, and Ag) and promoting the oxidation reduction reaction in cathode. As a main component of AEMFC, anion exchange membrane(AEM) requires high ionic conductivity and excellent alkaline stability. In this study, brominated hyperbranced poly(arylene ether sulfone)s (BHB-PAES)s were synthesized according to degree of bromination, and electrochemical properties, alkaline stability, and mechanical stability were investigated in details. First, 2,2-bis(4-hydroxy-3-methylphenyl)propane and bis-(4-chlorophenyl)sulfone were synthesized for hydrophilic precursor. subsequently, a hydrophobic oligomer was prepared by synthesizing 1,1,1-tris(4-hydroxyphenyl)ethane and bis-(4-chlorophenyl)sulfone. Then, hyperbranched poly(arylene ether sulfone)s (HB-PAESs) were synthesized via polycondensation by using prepared hydrophilic precursor and hydrophobic oligomer. HB-PAES was brominated by using NBS(N-bromosuccinimide) and BPO(benzoyl peroxide), and the resulting brominated hyperbranched poly(arylene ether sulfone)(BHB-PAES) was dried under vacuum for 24h. BHB-PAES was dissolved in tetrachloroethane(TCE) to reaction with triethylamine for quaternization reaction. 1H NMR (proton nuclear magnetic resonance) and FT-IR (fourier-transform infrared spectroscopy) were measured for structural analysis. In addition, in order to confirm the dimensional stability of the membrane, the swelling ratio and the water uptake were analyzed. Finally, the mechanical properties, ion exchange capacity (IEC) and ionic conductivity were measured.
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