Measurement of dynamic surface tension to determine critical micellar concentration in lipophilic silicons surfactants

Citation
I. Baquerizo et al., Measurement of dynamic surface tension to determine critical micellar concentration in lipophilic silicons surfactants, FARMACO, 55(9-10), 2000, pp. 583-589
Citations number
12
Categorie Soggetti
Pharmacology & Toxicology
Journal title
FARMACO
ISSN journal
0014827X → ACNP
Volume
55
Issue
9-10
Year of publication
2000
Pages
583 - 589
Database
ISI
SICI code
0014-827X(200009/10)55:9-10<583:MODSTT>2.0.ZU;2-Y
Abstract
Silicone surfactants are becoming increasingly important in the pharmaceuti cal and cosmetic industry, because of their versatility, low cost, and tech nological advantages. The present study was designed to measure the critica l micellar concentration of three non-ionic silicone surfactants. one water -soluble and two lipid-soluble. We measured surface tension with a techniqu e based on drop geometry. Solubility and dispersibility in water were teste d in the two lipophilic surfactants with visible and UV light spectrophotom etry. The data obtained with all techniques showed a characteristic behavio r of lipophilic silicone surfactants, which did not entirely conform to the definition of critical micellar concentration. (C) 2000 Published by Elsev ier Science S.A. All rights reserved.