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Received June 19, 2008
Accepted August 11, 2008
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실크 분해 아미노산에 의한 탄산칼슘 결정의 polymorphism

Polymorphism of Calcium Carbonate Crystal by Silk Digested Amino Acid

충남대학교 화학공학과, 305-764 대전시 유성구 궁동 220 1동아대학교 화학공학과, 604-714 부산시 사하구 하단2동 840 2경희대학교 환경응용화학대학, 446-701 경기도 용인시 서천리 1
Department of Chemical Engineering, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon 305-764, Korea 1Department of Chemical Engineering, Dong A University, 840 Hadan-2dong, Saha-gu, Busan 604-714, Korea 2School of Environment and Applied Chemistry, Kyunghee University, 1 Seochun-ri, Kiheung-up, Yongin, Gyeonggi 446-701, Korea
ihkim@cnu.ac.kr
Korean Chemical Engineering Research, December 2008, 46(6), 1107-1112(6), NONE Epub 29 December 2008
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Abstract

침강성 탄산칼슘의 제조를 위해 액체-액체 상태에서의 결정화 실험을 실행하였다. 탄산칼슘 결정을 만들기 위한 방법 중 조작이 간단하며 다양한 탄산칼슘 결정을 얻을 수 있는 염화칼슘과 탄산나트륨의 반응법을 선택하였다. 반응 시간, 용질의 농도, pH, 유기 첨가제를 변경하여 탄산칼슘을 합성하였다. 유기 성분을 가진 탄산칼슘을 합성하기 위해 아미노산이 복합되어 있는 silk fibroin을 첨가하였고, silk fibroin이 탄산칼슘의 결정화에 미치는 영향에 대해 초점을 맞추어 실험을 수행하였다. 여러 탄산칼슘 결정을 분석하기 위해 FE-SEM, XRD, 그리고 FT-IR을 사용하였다. 반응 시간, pH가 탄산칼슘 결정 형태에 큰 영향을 줌을 관찰하였다. Silk fibroin이 결정형태 vaterite의 형성을 저해하고 calcite의 형성에 효율적인 첨가제로 작용하는 것을 발견하였다.
Crystallization of calcium carbonate was performed by using aqueous calcium chloride and sodium carbonate for operational simplicity. Reaction time, solute concentrations, pH, and organic additive were varied to get calcium carbonate crystals. Silk fibroin was used as the additive to understand the change of morphology of calcium carbonate crystal. The crystals were analyzed by FE-SEM, XRD, and FT-IR. Reaction time, and pH mainly affected the morphology of crystals. Besides, it was found that silk fibroin inhibited the formation of vaterite and promoted the calcite forms.

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