Effect of Surfactant Concentration and Operating Temperature on the Drop Size Distribution of Silicon Oil Water Dispersion
Effect of Surfactant Concentration and Operating Temperature on the Drop Size Distribution of Silicon Oil Water Dispersion
复制标题
表面活性剂浓度和操作温度对硅油水分散体液滴尺寸分布的影响
DOI：
10.1080/01932690701345893
复制
发表时间：
2007
影响因子：
2.2
通讯作者：
A. El
中科院分区：
文献类型：
--
作者：
A. El
成功地研究了十二烷基硫酸钠（SLES）表面活性剂和操作温度对350 cSt Dow Corning 200系列油-水分散液的液滴尺寸分布的影响。在标准的6升混合罐中以不同的叶轮速度制备分散体。在25°C下进行SLES临界胶束浓度（CMC）的测量。在25 - 80°C温度范围内，在不同SLES浓度下，完成了硅油-水的界面张力。结果表明，随着操作温度的升高和表面活性剂浓度的增加，硅油/水界面张力降低。当在最高SLES浓度下增加操作温度时，观察到d 32的减少。这归因于表面活性剂在高温下水合的可能性。当在恒定温度但不同SLES浓度下测量液滴尺寸分布时，观察到相同的行为。结果发现，平均液滴尺寸随混合时间而减小。对于不同的SLES浓度，得到了中值液滴尺寸随时间变化的不同斜率。对于相同浓度，斜率在1小时后发生变化。斜率变化的程度是由于油水界面面积随混合时间的变化和表面活性剂浓度的消耗所致。
The effect of sodium lauryl sulphate (SLES) surfactant and the operating temperature on the drop size distribution of a 350 cSt Dow Corning 200 series oil water dispersion was successfully studied. The dispersion was prepared in a standard 6 litres mixing tank at different impeller speeds. A measurement of the SLES critical micelle concentration (CMC) at 25°C was carried out. The interfacial tension of silicon oil water under various SLES concentration at a temperature range of 25 to 80°C was accomplished. Results showed that the interfacial tension of the silicon oil water decreased as the operating temperature increased and as the surfactant concentration increased. When the operating temperature was increased at the highest SLES concentration tested, a decrease of d 32 was observed. This was attributed to the possibility of hydration of the surfactant at high temperature. Same behavior was observed when measuring the drop size distribution at constant temperature but different SLES concentration. It was found that the mean drop size decreases with mixing time. Different slopes of the change of the median drop size with time were obtained for different SLES concentration. For the same concentration, the slope changes after 1 hour. The degree change of the slope is due to the change of interfacial area of the oil water as mixing time elapsed and the depletion of the surfactant concentration.