Post-sulfonation에 의한 SBS 이온교환막의 제조 및 특성

최용재; 황의환; 황택성; Yongjae Choi; Eui Hwan Hwang; Taek Sung Hwang

Korean Chemical Engineering Research, Vol.48, No.6, 731-736, December, 2010

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Post-sulfonation에 의한 SBS 이온교환막의 제조 및 특성

Preparation and Property of SBS Ion-exchange Membrane Via Post-sulfonation

최용재, 황의환 ¹, 황택성 ^†

충남대학교 화학공학과, 305-764 대전시 유성구 궁동 220
¹공주대학교 화학공학부, 313-717 충남 천안시 서북구 부대동 275

Yongjae Choi, Eui Hwan Hwang¹, and Taek Sung Hwang^†

Department of Chemical Engineering, College of Engineering, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon 305-764, Korea
¹Department of Chemical Engineering, Kongju National University, 275 Budae-dong, Cheonan-si, Chungnam 331-717, Korea

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초록

본 연구에서는 post sulfonation 반응을 통하여 SBS 양이온교환막을 제조하였다. 술폰화 양이온교환막의 술폰화도, 함수율, 이온교환용량, 전기저항 및 전기전도도등 막의 전기적 특성을 술폰화 시간을 변수로 하여 확인하였다. 술폰화 SBS 막의 술폰화도는 반응시간 및 황산의 농도가 증가함에 따라 증가하였으며 최대 술폰화도는 24.0%이었다. 또한 막의 함수율과 이온교환용량은 술폰화도가 증가함에 따라 증가하였으며 각각 41.2%, 0.80 meq/g로 가장 높았으며, 전기저항과 전기전도도는 각각 23.6 Ω·cm2, 4.24×10^(-4) S/cm이었다.

In this study, the sulfonated SBS cation-exchange membrane was prepared by post-sulfonation. Degree of sulfonation(DS), water-uptake, ion exchange capacity and electrical resistance and conductivity of sulfonated SBS were investigated as a function of sulfonation time. The DS of sulfonated SBS membrane was increased with increasing the reaction time and concentration of sulfuric acid. The maximum value of DS was 24.0%. And also, the water uptake and ion exchange capacity of the sulfonated SBS membrane were increased as increasing the value of DS. The values of water uptake and IEC were 41.2% and 0.80 meq/g, respectively. The electrical resistance and conductivity of the membrane showed 23.6 Ω·cm2 and 4.24×10^(-4) S/cm, respectively.

Keywords:SBS Membrane;Post Sulfonation;Water Uptake;Ion Exchange Capacity;Electrical Resistance

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