Interactions between betaine-type zwitterionic and anionic surfactants in mixed micelles

Journal Article · Tue Jan 01 00:00:00 EST 1991 · Langmuir; (United States)

DOI:https://doi.org/10.1021/la00049a008· OSTI ID:5325808

Iwasaki, Toshihiko; Ogawa, Masataka; Esumi, Kunio; Meguro, Kenjiro ^[1]

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1. Univ. of Tokyo, (Japan)

The interaction between zwitterionic and anionic mixed surfactants has been investigated by means of surface tension, static and dynamic light-scattering, {sup 1}H NMR spectroscopy, rheological measurement, and probing methods. These systems are N-alkyl-N,N-dimethylbetaine (C{sub 12},DNB; C{sub 14}, TNB) and sodium dodecyl sulfate (SDS) in the presence of 0.01 mol dm{sup {minus}3} NaCl. These systems show a composition dependency in micellar properties. When the molar fraction of DNB and TNB is about 0.6, the cmc values of these systems exhibit minima, whereas the solubilized amount of water-insoluble dye, viscosity, and NMR line widths show maxima. Furthermore, the size of a micelle is found to increase at the same fraction. The viscosity displays a Newtonian flow at all compositions for the DNB-SDS system, while a strong shear dependence is observed at a certain composition for the TNB-SDS system where a sphere-rod transition would occur in micellar shape due to the formation of intramolecular complexes by the electrostatic interaction of oppositely charged head groups between TNB and SDS.

• OSTI ID: 5325808
• Journal Information: Langmuir; (United States), Vol. 7:1; ISSN 0743-7463
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BETAINE
NMR SPECTRA
RHEOLOGY
SURFACE TENSION
SODIUM SULFATES
ELECTROSTATICS
EXPERIMENTAL DATA
LIGHT SCATTERING
MICELLAR SYSTEMS
SURFACTANTS
ALKALI METAL COMPOUNDS
AMINES
AMINO ACIDS
AMMONIUM COMPOUNDS
CARBOXYLIC ACIDS
DATA
DRUGS
INFORMATION
LIPOTROPIC FACTORS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
QUATERNARY COMPOUNDS
SCATTERING
SODIUM COMPOUNDS
SPECTRA
SULFATES
SULFUR COMPOUNDS
SURFACE PROPERTIES
400201* - Chemical & Physicochemical Properties