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논문 기본 정보

자료유형
학술대회자료
저자정보
Nah, Sung-Soon (Department of Chemical Engineering Yonsei University) Lee, Sung-Min (Department of Chemical Engineering Yonsei University) Min, Min-Byung (Department of Chemical Engineering Yonsei University) Lee, Chang-So (Hankook Jungsoo Industries Co., Ltd)
저널정보
한국막학회 한국막학회 하계 Workshop 한국막학회 1999년도 The 7th Summer Workshop of the Membrane Society of Korea
발행연도
1999.1
수록면
115 - 115 (1page)

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In this work a new process was developed for the sulfonation of the chemicallly stable engineering polymer polyethersulfone as membrane materials for electrodialysis or a flow battery applications. Commercially available polyethersulfone polymer was partially sulfonated using a CSA sulfonating agent in a dichloromethane solvent, which sulfonated polyethersulfone with various sulfonation levels have been prepared. Sulfonated polyethersulfone (SPES) membranes with different ion capacities were prepared for the purpose of identifying cation exchange membrane properties, in an attempt to find a low cost replacement for Nafion, which most of the perfluorinated membranes, known to exhibit a prolonged service life, are expensive and difficult to process. The following features were determined: the degree of sulfonation, water uptake, thermal analysis, and electrochemical properties such as ion exchange capacities, resistivity, selectivity of ion permeation. The surface of the cation exchange membranes, decomposed with the H202-treatment, were observed by using scanning electron microscope. The area resistivities of SPES mebranes in 5N-NaOH decreased from $2,150{\;}{\Omega}-cm2$ to less than $15{\Omega}-cm2$ as the ion exchange capacity (IEC) increased from 0.62 to 1.73 millieequivlants per dry gram(meq/dg).eq/dg).

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