Micellar Weights of Non-ionic Surfactants. III. Temperature Dependence of Micellar Weight and Critical Micelle Concentration.
نویسندگان
چکیده
منابع مشابه
Critical Micelle Concentration . A Transition Point for Micellar Size Distribution
A critical concentration is defined which separates two kinds of behavior of the size distribution of micellar aggregates of surfactant molecules. Below this concentration, the size distribution is a monotonic decreasing function of size; above this concentration, the size distribution is a function exhibiting two extrema and the contribution of larger aggregates becomes important. Quantitative...
متن کاملCritical Micellar Concentration
Definition Typical presentation of Crohn disease includes inflammation in the terminal ileum. However, this typical presentation with ileitis is seen only in 70% of cases. 25% of patients present with disease confined only to the colon (Crohn colitis) and in 5% exclusive involvement of the upper gastrointestinal tract is seen. The diagnosis is mostly based on a suggestive clinical course, a typ...
متن کاملCholesterol solubility in mixed micellar solutions of ionic and non-ionic surfactants.
The solubility of cholesterol in mixed aqueous ionic and non-ionic micellar systems in the presence and absence of salts and ionic dyes has been studied. The mixed micellar system of cetyl trimethyl ammonium bromide and Triton X-100 solubilized more cholesterol than a system consisting of sodium dodecyl sulfate and Triton X-100. The influence of salts and dyes on these systems was moderate but ...
متن کاملMicellar Solutions of Ionic Surfactants and Their Mixtures with Nonionic Surfactants: Theoretical Modeling vs. Experiment1
Here, we review two recent theoretical models in the field of ionic surfactant micelles and discuss the comparison of their predictions with experimental data. The first approach is based on the analysis of the stepwise thinning (stratification) of liquid films formed from micellar solutions. From the experimental step wise dependence of the film thickness on time, it is possible to determine t...
متن کاملMeasurement of dynamic surface tension to determine critical micellar concentration in lipophilic silicone surfactants.
Silicone surfactants are becoming increasingly important in the pharmaceutical and cosmetic industry, because of their versatility, low cost, and technological advantages. The present study was designed to measure the critical micellar concentration of three non-ionic silicone surfactants, one water-soluble and two lipid-soluble. We measured surface tension with a technique based on drop geomet...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nippon kagaku zassi
سال: 1958
ISSN: 0369-5387,2185-0917
DOI: 10.1246/nikkashi1948.79.1194