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액-액 분산계의 상대점도에 관한 연구
Studies on the Relative Viscosities of Liquid-Liquid Dispersion Systems
HWAHAK KONGHAK, December 1989, 27(6), 751-758(8), NONE
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Abstract
액-액 분산계의 유동적 특성인 상대점도에 관하여 분산상의 부피농도 외에 액적 입도분포를 고려하여 수학적 모델, μr=exp[aΦt+BΦt2]을 제시하였다. 이 식에서 A와B는 연속상과 분산상의 점도, 분산상의 액점 입도분포, 분산상의 액적 직경, 분산사와 연속상 계면의 점도 특성의 함수로 표현된다.
본 연구에서 제안된 모델의 타당성을 검토하기 위하여, 문헌에 발표된 여러 종류의 분산계의 상대점도에 관한 자료들을 본 모델에 적용하여 실험치와 계산치를 비교한 결과, 모델에 의한 계산치가 실험치에 대하여 0%에서 3.86% 상이의 오차분포를 나타내었으며, 에멀젼계에 대해서는 4.09%의 오차범위 내에서 실험치와 일치하였다.
본 연구에서 제안된 모델의 타당성을 검토하기 위하여, 문헌에 발표된 여러 종류의 분산계의 상대점도에 관한 자료들을 본 모델에 적용하여 실험치와 계산치를 비교한 결과, 모델에 의한 계산치가 실험치에 대하여 0%에서 3.86% 상이의 오차분포를 나타내었으며, 에멀젼계에 대해서는 4.09%의 오차범위 내에서 실험치와 일치하였다.
The relative viscosity of dispersion was investigated focussing the attention on the drop size distribu-tion as well as the volume concentration of the dispersed phase:
μr = exp[AФt + BФt2]
where Ф is the volume concentration of the dispersed phase; A and B are functions of drop size distribution of the diis-persed phase and viscosities of the continuous and the dispersed phases. In order to validate the proposed model, published data were applied to the model and were compared with cal-culated results. The errors between experimental viscosities and calculated values ranged from 0% to 3.86% depend-ing on the materials of dispersions. Also the same model has been applied to the emulsion system. Predicted viscos-ities of emulsions by the model agreed with experimental data reasonably well giving a maximum error of 4.1%.
μr = exp[AФt + BФt2]
where Ф is the volume concentration of the dispersed phase; A and B are functions of drop size distribution of the diis-persed phase and viscosities of the continuous and the dispersed phases. In order to validate the proposed model, published data were applied to the model and were compared with cal-culated results. The errors between experimental viscosities and calculated values ranged from 0% to 3.86% depend-ing on the materials of dispersions. Also the same model has been applied to the emulsion system. Predicted viscos-ities of emulsions by the model agreed with experimental data reasonably well giving a maximum error of 4.1%.