Simulation study to model extremely slow reaggregation processes in micelle solutions
Article Abstract:
The dynamics of micellization on a dodecylpyridinium iodide/water system has been studied through photon correlation measurements. It has been noted that large micelles are formed after the temperature goes down to 25 degrees C from 80 degrees C. The micellar radius exhibits extremely long relaxation times which may take several hours. The unfavorable equilibrium concentration of intermediates of submicellar size prevents the nucleation of micelle aggregates. This results in a nonequilibrium distribution with an excess of large micelles during thermal equilibrium.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Extremely slow reaggregation in micelle solutions. A dynamic light scattering study
Article Abstract:
The dynamics of reaggregation in micelle solutions were investigated using a dynamic light scattering technique. Photon correlation calculations were carried out for the dodecylpyridinium iodide/water system to produce the mean radius of micelles as a function of the time interval after a decrease in the temperature from 80 to 25 degrees Celsius. Large aggregates may be formed after the temperature change depending on the purification method applied to the sample. The micellar radius demonstrates a relaxation behavior with significantly long relaxation times.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Entropy-driven micellar aggregation
Article Abstract:
The size distribution of neutral and charged micelles from molecular parameters of the aggregating monomers is computed through a theoretical model. The model contains the range of oligomeric species between the monomer and the average-sized micelles. The main reason behind the loss of entropy is the reduction in the orientation of hydrogen bonds in the vicinity of nonhydrophilic parts of a solute molecule or aggregate.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
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