期刊
JOURNAL OF SURFACTANTS AND DETERGENTS
卷 25, 期 2, 页码 275-279出版社
WILEY
DOI: 10.1002/jsde.12556
关键词
DODAB; lipid monolayer; lipid vesicle; monolayer-vesicle interactions; monomer exchange
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo
The study found that there is an exchange interaction between DODAB monolayers and vesicles at different concentrations, especially more significant at higher vesicle concentrations.
Studies on the interaction of lipid monolayer with bilayer structures, such as vesicles, are relatively scarce in the literature. In order to ascertain whether these structures interact for cationic dioctadecyldimethylammonium bromide (DODAB) monolayers at the aqueous surfaces of 0, 0.05, and 0.5 mmol L-1 DODAB vesicle dispersions, differential scanning calorimetry (DSC) and surface film balance experiments were carried out. DSC results confirmed the presence of unilamellar vesicles in the subphase, while changes in the monolayer surface pressure-area per molecule (pi-A) isotherm profile yielded by the presence of DODAB vesicle in the subphase revealed monolayer-vesicle interactions as a result of monomer exchanges between the monolayer and the vesicles with stronger effects at the higher vesicle concentration investigated.
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