Interfacial Tension of Polyethylene Glycol/Potassium Phosphate Aqueous Two-Phase Systems
Interfacial Tension of Polyethylene Glycol/Potassium Phosphate Aqueous Two-Phase Systems
复制标题
聚乙二醇/磷酸钾水两相体系的界面张力
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
C. Rha
中科院分区：
文献类型：
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作者：
Chan;C. Rha
摘要采用旋转滴法测定了聚乙二醇/磷酸钾两相体系的界面张力。在两相体系中，界面张力低至0.001达因/cm，并且随着聚乙二醇和磷酸钾总浓度的增加而增加。界面张力的增加是聚乙二醇和磷酸钾在顶相和底相之间的浓度差异的函数，这一点通过联线分析得到了证实。界面张力也受聚乙二醇分子量的影响。在低PEG分子量时，分子量的增加大大增加了界面张力，而在高分子量时，界面张力随分子量的变化较小。
Abstract The interfacial tension of Polyethylene glycol (PEG)/potassium phosphate two-phase systems was measured by the rotating drop method. The interfacial tension was as low as 0.001 dyne/cm and increased with increases in the total concentrations of both PEG and potassium phosphate in two-phase systems. The increase in the interfacial tension was a function of the concentration differences of PEG and potassium phosphate between the top and the bottom phases which was confirmed by the tie line analysis. The interfacial tension was affected also by the molecular weigth of PEG. At low PEG molecular weights, the increase in the molecular weight greatly increased the interfacial tension, but at high molecular weights, the interfacial tension varied less with the molecular weight.