肺表面活性物质
微球
乳状液
表面积体积比
体积热力学
溶剂
材料科学
萃取(化学)
化学工程
相(物质)
色谱法
化学
有机化学
物理
量子力学
工程类
作者
Harri Heiskanen,Peter Denifl,Päivi Pitkänen,Markku Hurme
标识
DOI:10.1016/j.cherd.2012.02.008
摘要
Methylaluminoxane microspheres were prepared using a hydrocarbon-in-perfluorocarbon-emulsion solvent extraction process. The effect of the preparation conditions on the size of the microspheres was investigated. As expected, the size of the microspheres decreased with increasing stirring speed. At low surfactant concentrations the size of the microspheres was independent of the surfactant concentration. However, the size of the microspheres decreased as the surfactant concentration was further increased. The size of the microspheres was not only affected by the surfactant concentration but also by the volume ratio of the dispersed phase to the continuous phase. At a low volume ratio of the phases the effect of the surfactant on the size of the microspheres was larger than the effect of the increased volume ratio of the phases. At high volume ratios of the phases the effect of the volume ratio of phases on the size of the microspheres became more significant than the effect of the surfactant. A slow solidification increased the formation of non-spherical microspheres.
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