Structural transitions of CTAB micelles in the presence of n-octylamine: A small angle neutron scattering study

Journal Article · Mon Feb 01 00:00:00 EST 1993 · Journal of Colloid and Interface Science; (United States)

DOI:https://doi.org/10.1006/jcis.1993.1055· OSTI ID:6305266

Prasad, C D; Singh, H N ^[1]; Goyal, P S; Rao, K S ^[2]

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1. Aligarh Muslim Univ. (India)
2. Bhabha Atomic Research Centre, Bombay (India)

Small angle neutron scattering (SANS) was used to characterize the micelles of cetyltrimethylammonium bromide (CTAB) in D[sub 2]O solutions, with or without added n-octylamine. SANS data have been analyzed using various models. Micellar parameters, such as mean aggregation numbers, micelle dimensions, and fractional charge on the micelles, are reported from the analysis of SANS spectra for the CTAB/n-octylamine system as a function of octylamine concentration and temperature. Results are interpreted in terms of micellar sphere-to-rod transition prompted by amine concentration in CTAB micellar solution. The size of the micelle decreases as the temperature increases.

• OSTI ID: 6305266
• Journal Information: Journal of Colloid and Interface Science; (United States), Vol. 155:2; ISSN 0021-9797
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
MICELLAR SYSTEMS
MORPHOLOGICAL CHANGES
AGGLOMERATION
AMINES
AMMONIUM HALIDES
BROMIDES
CONCENTRATION RATIO
HEAVY WATER
MATHEMATICAL MODELS
SMALL ANGLE SCATTERING
SURFACE POTENTIAL
SURFACTANTS
TEMPERATURE DEPENDENCE
VISCOSITY
AMMONIUM COMPOUNDS
BROMINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POTENTIALS
SCATTERING
WATER
400201* - Chemical & Physicochemical Properties