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HWAHAK KONGHAK,
Vol.39, No.5, 552-556, 2001
Vol.39, No.5, 552-556, 2001
에틸렌 글리콜에서 탄산칼슘에 대한 테트라에틸암모늄 하이드록사이드의 분산효능
Efficacy of Tetraethylammonium Hydroxide in Dispersing Calcium Carbonate in Ethylene Glycol
에틸렌 글리콜에서 테트라에틸암모늄 하이드록사이드는 탄산칼슘의 분산에 효과적이었으며 45 wt% 탄산칼슘 현탁액에서 테트라에틸암모늄 하이드록사이드의 효과적인 처리량은 0.30 wt%이었다. 이 조건에서 다른 처리농도의 경우에 비하여 평균 입경이 양호하고 현탁액의 점도도 낮게 나타났을 뿐만 아니라 현탁액의 제타포텐셜 에너지 또한 분산안정성을 양호하게 유지시킬 수 있음을 확인하였다. 탄산칼슘에 테트라에틸암모늄 하이드록사이드의 처리후 pH를 6-12의 범위로 조절하여도 입도의 변화는 양호하였으며 이는 양이온성 테트라에틸암모늄 하이드록사이드의 우수한 상호 반발작용 때문이다.
Tetraethylammonium hydroxide was very effective in dispersion of calcium carbonate in ethylene glycol. The effective amount of tetraethylammonium hydroxide was 0.3 wt% at 45 wt% calcium carbonate suspension at which the values of average particle diameter, viscosity and zeta potential energy were good enough to maintain the dispersion stability. The variation of particle diameters was also good in the adjusted pH between 6 and 12 after treatment of tetraethylammonium hydroxide on calcium carbonate surface. It was due to adsorption on the calcium carbonate of the cationic tetraethylammonium hydroxide electrolyte thus strengthening mutual repulsion.
Keywords:
Surface Treatment; Ethylene Glycol; Calcium Carbonate; Dispersion; Tetraethylammonium Hydroxide
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