Effect of additives on the micellar systems as studied by membrane osmometry

Journal Article · Tue Aug 01 04:00:00 EDT 1978 · J. Colloid Interface Sci.; (United States)

DOI:https://doi.org/10.1016/0021-9797(78)90191-1· OSTI ID:6170482

Birdi, K S; Backlund, S; Dalsager, S; Krag, T; Sorensen, K

The effect of the addition on n-propanol to various micellar systems (e.g., sodium dodecyl sulfate, cetyltrimethylammonium bromide, sodium laurate) in aqueous media was studied. The critical micelle concentration (CMC) as well as the micellar molecular weight (number average as determined by membrane osmometry) was determined as a function of the concentration of n-propanol. The analysis of the data indicated that the additive, i.e., n-propanol, does not take part in the micelle formation. The second virial coefficient changed sign (i.e., from positive to negative) when the propanol concentration was greater than approximately 0.8 mole KG/sup -1/, in all the systems studied. The data also showed that aggregation number (number average) decreased with increasing concentration of propanol, until at a concentration of approximately 20% (weight percent) no micelles are formed. 24 references.

• OSTI ID: 6170482
• Journal Information: J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 66:1; ISSN JCISA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ADDITIVES
AGGLOMERATION
ALCOHOLS
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
AMMONIUM HALIDES
BROMIDES
BROMINE COMPOUNDS
DISPLACEMENT FLUIDS
FLUIDS
HALIDES
HALOGEN COMPOUNDS
HYDROXY COMPOUNDS
MICELLAR SYSTEMS
MOLECULAR WEIGHT
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PROPANOLS
QUANTITY RATIO
SODIUM COMPOUNDS
SODIUM SULFATES
SULFATES
SULFUR COMPOUNDS