Thermodynamic analysis of the growth of sodium dodecyl sulfate micelles

Journal Article · Thu May 01 04:00:00 EDT 1980 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100446a021· OSTI ID:5633180

Missel, P J; Mazer, N A; Benedek, G B; Young, C Y; Carey, M C

A strong increase has been measured in the size and polydispersity of sodium dodecyl sulfate (SDS) micelles on increasing the detergent concentration in solutions containing high salt (NaCl) concentration. The mean hydrodynamic radius and the polydispersity of the micelles were measured. A thermodynamic theory of micelle formation and growth is presented. This theory makes use of the experimentally established result that the micelles have the shape of prolate spherocylinders. The micellar size and polydispersity is determined at each temperature and salt concentration by 2 chemical potentials. These are the chemical potential changes associated with transferring a detergent monomer from the solvent to either the cylindrical or spherical region of the micelle. Using only these 2 chemical potentials as parameters, one can predict accurately the hydrodynamic radius, the polydispersity, and the scattered light intensity over the entire experimental range of detergent concentration, temperature, and salt concentration. 43 references.

• OSTI ID: 5633180
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 84:9; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALKALI METAL COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
DISPLACEMENT FLUIDS
FLUIDS
HALIDES
HALOGEN COMPOUNDS
LIGHT SCATTERING
MICELLAR SYSTEMS
OXYGEN COMPOUNDS
PARTICLE SIZE
PHYSICAL PROPERTIES
QUANTITY RATIO
SCATTERING
SHAPE
SIZE
SODIUM CHLORIDES
SODIUM COMPOUNDS
SODIUM SULFATES
SULFATES
SULFUR COMPOUNDS
THERMODYNAMIC PROPERTIES