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유화상태에서 합성된 침강성 탄산칼슘의 결정형태에 관한 연구
A Study of Crystal Shape of the Precipitated Calcium Carbonate Formed in the Emulsion State
HWAHAK KONGHAK, April 1997, 35(2), 186-191(6), NONE
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Abstract
침강성 탄산칼슘을 유화상태에서 합성하였다. 염화칼슘과 탄산칼륨, 방향족 용매로서 벤젠과 크실렌, 그리고 유화제로서 Sapn 60과 Tween 80을 사용하였다. 반응온도, 시간, 용매의 종류, 그리고 반응물의 접촉방법 등을 변경하면서 탄산칼슘을 합성하고, 각각의 생성물에 대한 형태를 SEM으로, 결정구조를 XRD, 그리고 입자의 크기 분포를 광산란법으로 관찰하였다. 반응온도와 용매의 종류 그리고 반응물의 접촉방법이 탄산칼슘의 입자형태에 많은 영향이 있음을 관찰하였다.
The precipitated calcium carbonate was synthesized in an emulsion of reaction mixture. The starting materials were calcium chloride, potassium carbonate. Benzene and xylene were used as aromatic solvents, and Span 60 and Tween 80, as non-ionic surfactants. Calcium carbonate was synthesized at various reaction conditions such as reaction temperature, reaction time, solvent and the reaction method. Shape and crystal structure of the reaction product, calcium carbonate, were identified by SEM and XRD. Particle size distribution of calcium carbonate was measured by the light scattering method. The reaction temperature, type of solvents and the reaction method were found to have large effect on the shape and crystal structure of calcium carbonate.
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References
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