由非离子表面活性剂稳定的水包大豆油乳液的行为。

Behavior of soybean oil-in-water emulsion stabilized by nonionic surfactant.

作者信息

Hsu Jyh-Ping, Nacu Anca

机构信息

Department of Chemical Engineering, National Taiwan University, Taipei, 10617 Taiwan, ROC.

出版信息

J Colloid Interface Sci. 2003 Mar 15;259(2):374-81. doi: 10.1016/S0021-9797(02)00207-2.

DOI:10.1016/S0021-9797(02)00207-2

PMID:16256518

Abstract

A soybean oil-in-water emulsion was prepared using nonionic Tween series surfactants. The effects of temperature, hydrophilic-lipophilic balance (HLB) value of the surfactant, and surfactant-to-oil ratio on the size of emulsion drops were investigated with an acoustic and electroacoustic devices. In the case of Tween 85, the influence of pH and electrolyte on the zeta potential of emulsion drops was examined. zeta potential appears to be strongly dependent on pH, varying in the case of high concentrations of NaCl from +60 to -90 mV. High concentrations of Na+ and K+ are capable of separating the oil phase from the emulsion. Divalent cations such as Ca2+ and Mg2+ lead to two points of zero charge at high concentrations, which is not observed for the case of hydrolyzable trivalent species like Al3+ and Fe3+.

摘要

使用非离子吐温系列表面活性剂制备了水包大豆油乳液。用声学和电声装置研究了温度、表面活性剂的亲水亲油平衡（HLB）值以及表面活性剂与油的比例对乳液滴大小的影响。对于吐温85，研究了pH值和电解质对乳液滴ζ电位的影响。ζ电位似乎强烈依赖于pH值，在高浓度NaCl的情况下，ζ电位从+60 mV变化到 -90 mV。高浓度的Na⁺和K⁺能够使油相从乳液中分离出来。二价阳离子如Ca²⁺和Mg²⁺在高浓度时会导致两个零电荷点，而对于可水解的三价离子如Al³⁺和Fe³⁺的情况则未观察到这种现象。