Electric birefringence relaxation spectroscopy of linear micelles in aqueous cetyltrimethylammonium bromide solutions with sodium salicylate

1996 ◽  
Vol 104 (22) ◽  
pp. 9137-9141 ◽  
Author(s):  
Junichi Oizumi ◽  
Yasuyuki Kimura ◽  
Kohzo Ito ◽  
Reinosuke Hayakawa
Keyword(s):  
Cetyltrimethylammonium Bromide ◽  
Sodium Salicylate ◽  
Electric Birefringence ◽  
Birefringence Relaxation ◽  
Bromide Solutions

scholarly journals Characterization of proteoglycan and the proteoglycan-hyaluronic acid complex by electric birefringence

1978 ◽  
Vol 173 (1) ◽  
pp. 237-243 ◽  
Author(s):  
M Isles ◽  
A R Foweraker ◽  
B R Jennings ◽  
T Hardingham ◽  
H Muir
Keyword(s):  
Hyaluronic Acid ◽  
Particle Orientation ◽  
Dilute Solution ◽  
Relaxation Rates ◽  
Acid Complex ◽  
Electric Birefringence ◽  
Partial Alignment ◽  
Uronic Acid Content ◽  
Birefringence Relaxation

An electric field causes partial alignment of macromolecules in a dilute solution. The accompanying changes in the solution birefringence offer a sensitive and quick means of monitoring the rates of particle orientation and hence the size of the solute molecules. Such measurements are reported for dilute solutions of proteoglycans in the absence and presence of added hyaluronic acid. The proteoglycan molecules are shown to be some 580 nm long. In the presence of hyaluronic acid they form aggregates that appear to be consistent with the model previously proposed in which the proteoglycans attach radially to the extended hyaluronic acid chain. The electric-birefringence relaxation rates indicate aggregates of similar length to that of the extended hyaluronic acid chain, with the proteoglycans spaced on average at 29nm intervals. A proteoglycan sample the cystine residues of which had been reduced and alkylated showed no evidence of aggregation with hyaluronic acid up to the concentrations of the acid corresponding to 1% of the total uronic acid content. The electric-birefringence method is shown to have a large potential in the study of associating polysaccharide solutions.

Polymer-induced wormlike-to-spherical micelle transition in surfactant solutions

1993 ◽  
Vol 51 ◽  
pp. 878-879
Author(s):  
ZUCHEN LIN
Keyword(s):  
Microscopic Observation ◽  
Cetyltrimethylammonium Bromide ◽  
Sodium Salicylate ◽  
Biological Macromolecules ◽  
Spherical Micelle ◽  
Polymer Molecules ◽  
Surfactant Solutions ◽  
Pentaethylene Glycol ◽  
Dodecyl Ether ◽  
Newtonian Behavior

In various applications important to chemical, pharmaceutical, petroleum, and mineral processing industries, surfactant molecules are present in solution not alone but along with synthetic or biological macromolecules. The presence of polymer molecules gives rise to changes in the solution and its interfacial properties as compared to the corresponding polymer-free systems.The interaction between surfactant and polymer results in association of the two, which affect many properties of the system, especially the rheological ones. Recently, a polymer induced transition from non-Newtonian to Newtonian behavior was observed in the CTAB/NaSal system. This effect was attributed to a polymer-induced break-up of the worm-like micelles into spherical ones. This interpretation can be tested directly by microscopic observation.In this study, interactions between poly(vinylmethylether) (PVME) or poly(propyleneoxide) (PPO) (Aldrich, WI) and the nonionic surfactant pentaethylene glycol mono-dodecyl ether (C12E5) (Nikkol, Japan) or the cationic surfactant cetyltrimethylammonium bromide (CTAB) (Aldrich) with presence of sodium salicylate (NaSal) (Mallinkordt, MO) were examined by cryo-TEM and rheometry.

High-Frequency Dielectric Relaxation of Linear Micelles in Aqueous Solutions of Cetyltrimethylammonium Bromide with Sodium Salicylate

Langmuir ◽  
1997 ◽  
Vol 13 (11) ◽  
pp. 3052-3054 ◽  
Author(s):  
Junichi Oizumi ◽  
Hiroshi Furusawa ◽  
Yasuyuki Kimura ◽  
Kohzo Ito ◽  
Reinosuke Hayakawa
Keyword(s):  
Aqueous Solutions ◽  
Dielectric Relaxation ◽  
High Frequency ◽  
Cetyltrimethylammonium Bromide ◽  
Sodium Salicylate
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