Effect of electric charges on the growth process of micelles

Journal Article · Sat May 01 00:00:00 EDT 1993 · Journal of Colloid and Interface Science; (United States)

DOI:https://doi.org/10.1006/jcis.1993.1187· OSTI ID:6131188

Delsanti, M; Moussaid, A; Munch, J P ^[1]

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1. Univ. Louis Pasteur, Strasbourg (France)

Micellar solutions of cetyltrimethylammonium bromide (CTAB) in the presence of low KBr salt concentration have been investigated by means of elastic and quasi-elastic light scattering experiments. The electrostatic interactions between micelles are fixed, keeping the ratio of salt to surfactant concentration constant. The results indicate that up to a surfactant concentration [phi][sub 0], the micelle size is nearly constant. Above [phi][sub 0] the micelles grow very rapidly with the surfactant concentration. The crossover concentration [phi][sub 0] between the two regimes depends on the salt concentration: [phi][sub 0] decreases as the ratio of salt to surfactant concentration increases. The present observations are in qualitative agreement with recent theoretical work on the effect of electrostatic charges on the self-assembly of charged surfactants.

• OSTI ID: 6131188
• Journal Information: Journal of Colloid and Interface Science; (United States), Vol. 157:2; ISSN 0021-9797
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
MICELLAR SYSTEMS
AGGLOMERATION
AMMONIUM HALIDES
BROMIDES
CONCENTRATION RATIO
ELECTROSTATICS
LIGHT SCATTERING
PARTICLE SIZE
POTASSIUM BROMIDES
SURFACTANTS
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
BROMINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
POTASSIUM COMPOUNDS
SCATTERING
SIZE
400201* - Chemical & Physicochemical Properties