DETRIMENTAL EFFECT OF EXCESS LECITHIN ON THE STABILITY OF FLUOROCARBON LECITHIN EMULSIONS

被引：26

作者：

KRAFFT, MP ^{[1
]}

ROLLAND, JP ^{[1
]}

RIESS, JG ^{[1
]}

机构：

[1] UNIV NICE SOPHIA ANTIPOLIS,CHIM MOLEC LAB,UNITE CNRS,PARO VALROSE,F-06034 NICE,FRANCE

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 14期

关键词：

D O I：

10.1021/j100167a054

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The formation and stability of concentrated lecithin-stabilized emulsions of perfluorodecalin (100% and 70% w/v, i.e. 51.5% and 36.1% v/v) have been studied for lecithin/fluorocarbon ratios ranging from 2 to 11. The stability was found to go through a maximum for a lecithin/fluorocarbon ratio of 4-6%. Emulsions prepared with lecithin/fluorocarbon ratios higher than 6% lead, after 5 months storage at 4, 25, and 50-degrees-C, to increasingly larger particle sizes and wider size distributions. This detrimental effect of an excess of surfactant on the emulsions' stability is shown to be related to the presence of increasing amounts of fluorocarbon-empty lecithin-based aggregates. These aggregates were identified by ESR as consisting of free lecithin vesicles.

引用

页码：5673 / 5676

页数：4