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  • 05월 20일 18시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제125회 대한화학회 학술발표회 및 총회 Superb electrochemical properties of aliphatic/aromatic block copolymer containing cardo group for PEMFC application

등록일
2020년 5월 20일 15시 24분 15초
접수번호
2494
발표코드
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발표시간
온라인 PDF 제출
발표형식
포스터
발표분야
Environmental Energy
저자 및
공동저자
Dong Jin Yoo
Life Science, Jeonbuk National University, Korea
In this study, we newly designed and synthesized a sulfonated poly (arylene biphenyl ether sulfone) block copolymer. And then investigated the physical/thermal properties, dimensional stability, and electrochemical performance of PEM according to the oligomer length for PEMFC application in details. A sulfonated-fluorinated, hydrophilic-hydrophobic copolymer was designed and subsequently synthesized using typical nucleophilic aromatic polycondensation. The post sulfonation reaction using chlorosulfonic acid was carried out to have a proper degree of sulfonation and the membranes were fabricated via facile solution casting approach with DMSO. The considerable local concentration of acidic moieties in the hydrophilic polymer promotes the phase separation of the block copolymer, which were confirmed to demonstrate good phase-separated morphology via FE-SEM and AFM. The chemical structure, molecular weight, and intermolecular bond stretching of the copolymer were characterized using 1H- NMR, GPC, and FT-IR instrumentations. TGA and DSC based thermal properties were investigated, and the all the prepared membranes exhibit good thermal stabilities with the first degradation of 150℃. Prepared PEMs were extensively studied for ion exchange capacity (IEC), water uptake, dimensional stability, oxidative stability, and proton conductivity. The X20Y50 membranes showed the proton conductivity of 140 mS/cm at 90℃ under 100 % RH.

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