초록
본 연구에서는 열안정성 양이온 교환수지로 sulfonated poly(ether ether sulfone) (SPEES)을 합성하였고, SPEES는 hydroquinone과 dichlorophenyl sulfone으로 poly(ether ether sulfone) (PEES)을 합성한 후 술폰화 되었다. FT-IR 스펙트럼 분석으로부터 $1140cm^{-1}$에서 $SO_2$의 비대칭 신축진동에 의한 흡수피크가 나타나고, $621cm^{-1}$에서 S-C 진동에 의한 흡수피크가 나타나는 것으로 보아 술폰화가 되었음을 알 수 있다. IR 흡광도에 의해 얻어진 술폰화의 최적조건은 반응시간 3시간, 반응온도 $30^{\circ}C$, chlorosulfonic acid의 농도가 150 mol%이었다. 최적조건으로 술폰화된 PEES의 IR 흡광도에 의해 계산된 이온교환용량은 6.2 meq/g이었고, 적정에 의해 얻어진 이온교환용량값과 유사하였다. 또한 금속이온이 흡착되었을 때 SPEES의 morphology는 작은 뇌, 혹, 좁쌀같은 형태가 나타나며, 표면의 조직은 더욱 조밀해진다.
To synthesize cation exchange resin which has thermal stability, the sulfonated poly(ether ether sulfone) (SPEES) was obtained by sulfonation after synthesis of poly(ether ether sulfone) (PEES). It was prepared from hydroquinone and dichlorophenyl sulfone. From FT-IR results, the sulfonation was confirmed by the bands of asymmetric O=S=O stretching of $SO_3Na$ Na group at $1140cm^{-1}$ and S-C stretching at $621cm^{-1}$. The optimum condition of the sulfonation of PEES, based on IR absorbance, was 3 hr of reaction time, $30^{\circ}C$ of reaction temperature, and chlorosulfonic acid of 150 mol%. Ion exchange capacities calculated by the IR absorbance of PEES sulfonated in optimum condition was 6.2 meq/g, which was nearly similar to the ion exchange capacity calculated by titration. When the metal ion was adsorved, small brain, lump, hulled millet shape and compact surface, were observed in the morphology of SPEES.
