Structure, interaction, and growth of sodium dodecyl-o-xylenesulfonate micelles in aqueous solutions
The small-angle neutron scattering (SANS) technique was used to study the structure and interaction between micellar aggregates formed from an anionic surfactant, sodium dodecyl-o-xylenesulfonate, in aqueous solutions. In the range of monomer concentrations studied, namely, from 0.25 to 5 wt %, the intermicellar interaction was significant and the nonideality effect needs to be explicitly taken into account in the data analysis. The basic structural parameters of the micelle were determined at a low concentration by a contrast variation method at finite Q (Q is the magnitude of the scattering vector). The same set of basic parameters were then used as the input to study the growth and interaction of the micelles at higher concentrations and at different temperatures. The minimum micellar aggregate near cmc is found to be spherical with an aggregation number of 30. The aggregation number increases steadily at higher concentrations and the shape of the aggregates become prolate spheroidal. The interparticle structure factor was computed by solving a primitive model two-component Coulomb fluid in a mean spherical approximation. The effective charge of the micelle extracted from SANS experiment can be interpreted as the dressed charge they discussed in their previous paper.
- Research Organization:
- Massachusetts Institute of Technology, Cambridge
- OSTI ID:
- 6772885
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 91:6; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Structure and interaction of lithium dodecyl sulfate micelles in the presence of Li-specific macrocyclic cage: A study by SANS
Structure and growth of bis(2-ethylhexyl) sulfosuccinate micelles in aqueous solutions
Related Subjects
400201* -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
ALKYLATED AROMATICS
AQUEOUS SOLUTIONS
AROMATICS
CHEMICAL PREPARATION
COHERENT SCATTERING
DATA
DIFFRACTION
DISPERSIONS
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
MICELLAR SYSTEMS
MIXTURES
MOLECULAR STRUCTURE
NEUTRON DIFFRACTION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
QUANTITY RATIO
SCATTERING
SMALL ANGLE SCATTERING
SODIUM COMPOUNDS
SOLUTIONS
SULFONATES
SYNTHESIS
TEMPERATURE DEPENDENCE
XYLENES