Research output: Contribution to journal › Article › peer-review
Diffusion Coefficients of Ionic Surfactants with Different Molecular Structures in Aqueous Solutions. / Movchan, T.G.; Rusanov, A.I.; Soboleva, I.V.; Khlebunova, N.R.; Plotnikova, E.V.; Shchekin, A.K.
In: Colloid Journal, Vol. 77, No. 4, 2015, p. 492-499.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Diffusion Coefficients of Ionic Surfactants with Different Molecular Structures in Aqueous Solutions
AU - Movchan, T.G.
AU - Rusanov, A.I.
AU - Soboleva, I.V.
AU - Khlebunova, N.R.
AU - Plotnikova, E.V.
AU - Shchekin, A.K.
PY - 2015
Y1 - 2015
N2 - Aqueous micellar solutions of dodecyl and hexadecyltrimethylammonium bromides, hexade cylpyridinium bromide and chloride, domiphen bromide ((dodecyldimethyl N 2 phenoxyethyl)ammonium bromide), hexadecyltriphenylphosphonium bromide, and sodium dodecyl sulfate have been investigated using dynamic light scattering. A local increase in the diffusion coefficient has been discovered for all ionic surfactants at concentrations higher than the first critical micelle concentration (CMC1). It has been shown that, at the same alkyl chain length and counterion nature, the increase in the diffusion coefficient with surfactant content becomes more pronounced with a reduction in CMC1. The concentration dependences ofthe diffusion coefficients have been explained in terms of a previously proposed theory formulated for ideal micellar systems. The existence of the local minimum in the diffusion coefficient near CMC1 has been shown to be a general regularity for binary surface active electrolytes.
AB - Aqueous micellar solutions of dodecyl and hexadecyltrimethylammonium bromides, hexade cylpyridinium bromide and chloride, domiphen bromide ((dodecyldimethyl N 2 phenoxyethyl)ammonium bromide), hexadecyltriphenylphosphonium bromide, and sodium dodecyl sulfate have been investigated using dynamic light scattering. A local increase in the diffusion coefficient has been discovered for all ionic surfactants at concentrations higher than the first critical micelle concentration (CMC1). It has been shown that, at the same alkyl chain length and counterion nature, the increase in the diffusion coefficient with surfactant content becomes more pronounced with a reduction in CMC1. The concentration dependences ofthe diffusion coefficients have been explained in terms of a previously proposed theory formulated for ideal micellar systems. The existence of the local minimum in the diffusion coefficient near CMC1 has been shown to be a general regularity for binary surface active electrolytes.
KW - мицеллы диффузия ионные ПАВ динамическое рассеяние света
U2 - 10.1134/S1061933X15040146
DO - 10.1134/S1061933X15040146
M3 - Article
VL - 77
SP - 492
EP - 499
JO - Colloid Journal
JF - Colloid Journal
SN - 1061-933X
IS - 4
ER -
ID: 3938157