Solubilization and emulsification of perfume in discontinuous cubic phase

Citation
Mh. Uddin et al., Solubilization and emulsification of perfume in discontinuous cubic phase, LANGMUIR, 16(17), 2000, pp. 6891-6897
Citations number
39
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
LANGMUIR
ISSN journal
0743-7463 → ACNP
Volume
16
Issue
17
Year of publication
2000
Pages
6891 - 6897
Database
ISI
SICI code
0743-7463(20000822)16:17<6891:SAEOPI>2.0.ZU;2-B
Abstract
Solubilization of three typical perfume compounds, d-limonene (LN), beta-io none (IN), and geraniol (GL), in the discontinuous micellar cubic (I-1) pha se of the water-polyoxyethylene dodecyl ether (C12EO25) system was investig ated by phase study and small-angle X-ray scattering (SAXS). The hydrocarbo n perfume LN increases the maximum melting temperature of the Il phase, whe reas GL decreases it. This phenomenon is related to their solubilization lo cation in the micelle. LN tends to be solubilized inside the aggregates and makes a perfume core (swelling). On the other hand, GL is solubilized in:t he surfactant palisade layer and expands the effective cross-sectional area per surfactant,as (penetration). The penetration tendency is in the order GL, IN, and LN,judging from the SAXS analysis. The change in repulsion betw een hydrophilic moieties of surfactant upon addition of perfume is evaluate d by calculating an optimum cross-sectional area, a(S,opt), at which the EO chain is neither compressed nor expanded. It is found from the calculation of a(S)/a(S,opt) that the repulsion considerably increases in the LN syste m whereas it decreases in the GL system.