Spontaneous emulsification of oil drops containing surfactants and medium-chain alcohols
Spontaneous emulsification of oil drops containing surfactants and medium-chain alcohols
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DOI：
10.1007/bfb0118162
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
M. Rang;C. Miller
中科院分区：
文献类型：
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作者：
M. Rang;C. Miller
用视频显微镜观察了正十六烷、正辛醇和纯非离子表面活性剂C12E6的混合物与水接触时的自发乳化现象。确定了该体系平衡相行为的相关方面，并通过浊度测量获得了有关乳滴尺寸和稳定性的信息。结果发现，当整个原始油滴转化为另一相时，即在这种情况下为微乳液时，会出现小而均匀的油滴和最稳定的乳液，由于辛醇扩散到水相中，微乳液随后在油中变得过饱和。研究了正癸烷、正庚醇和十四烷基二甲基氧化胺的混合物与水的自乳化行为。在这种情况下，当微乳液和中间层状液晶相都被油过饱和时，形成小液滴。
Spontaneous emulsification of mixtures ofn-hexadecane,n-octanol, and the pure nonionic surfactant C12E6brought into contact with water was observed using videomicroscopy. Relevant aspects of equilibrium phase behavior in this system were determined, and information on emulsion drop size and stability was obtained by turbidity measurements. It was found that small, uniform oil droplets and the most stable emulsions occurred when the entire original oil drop was converted to another phase — in this case a microemulsion — which subsequently became supersaturated in oil owing to diffusion of octanol into the aqueous phase. Spontaneous emulsification was also studied for mixtures ofn-decane,n-heptanol, and tetradecyldimethylamine oxide contacting water. In this case, small droplets were formed when both the microemulsion and an intermediate lamellar liquid crystalline phase became supersaturated with oil.