Phase behavior and microstructure evolution in aqueous mixtures of cetyltrimethylammonium bromide and sodium dodecyl tri-oxyethylene sulfate

P. A. Hassan; Travis K. Hodgdon; Masanobu Sagasaki; Gerhard Fritz-Popovski; Eric W. Kaler

doi:10.1016/j.crci.2008.08.009

Phase behavior and microstructure evolution in aqueous mixtures of cetyltrimethylammonium bromide and sodium dodecyl tri-oxyethylene sulfate

P. A. Hassan, Travis K. Hodgdon, Masanobu Sagasaki, Gerhard Fritz-Popovski, Eric W. Kaler

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

The phase behavior and microstructural changes in aqueous mixtures of cetyltrimethylammonium bromide (CTAB) and sodium dodecyl tri-oxyethylene sulfate (C₁₂E₃S) are reported. The mixing behavior of the two surfactants is investigated via surface tension measurements and the regular solution approximation yielded a β value of -13, indicating attractive interaction. The difference in the growth behavior of the micelles on the CTAB-rich and C₁₂E₃S-rich sides of the phase diagram is studied using viscosity, quasielastic light scattering, small angle neutron scattering, and cryogenic transmission electron microscopy (cryoTEM). Branched micelles are formed close to the phase boundary and are more prevalent in CTAB-rich micelles. A shear-induced transition of cylindrical to ribbon-like micelles is observed by cryoTEM in CTAB-rich micelles near the phase boundary. A temperature-induced phase transition is observed for C₁₂E₃S-rich micelles due to the dehydration and/or conformational changes of the hydrophilic oxyethylene part of C₁₂E₃S in the mixed micelles.

Original language	English (US)
Pages (from-to)	18-29
Number of pages	12
Journal	Comptes Rendus Chimie
Volume	12
Issue number	1-2
DOIs	https://doi.org/10.1016/j.crci.2008.08.009
State	Published - Jan 2009
Externally published	Yes

Bibliographical note

Funding Information:
P.A.H. is thankful to Dr. C. Manohar, Indian Institute of Technology, Mumbai, India for fruitful discussions. This work was supported by National Science Foundation grant CBET-0436195 and the National Institute of Standards and Technology.

Keywords

Cryogenic transmission electron microscopy
Light scattering
Micellar branching
Neutron scattering
Worm-like micelles

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10.1016/j.crci.2008.08.009

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title = "Phase behavior and microstructure evolution in aqueous mixtures of cetyltrimethylammonium bromide and sodium dodecyl tri-oxyethylene sulfate",

abstract = "The phase behavior and microstructural changes in aqueous mixtures of cetyltrimethylammonium bromide (CTAB) and sodium dodecyl tri-oxyethylene sulfate (C12E3S) are reported. The mixing behavior of the two surfactants is investigated via surface tension measurements and the regular solution approximation yielded a β value of -13, indicating attractive interaction. The difference in the growth behavior of the micelles on the CTAB-rich and C12E3S-rich sides of the phase diagram is studied using viscosity, quasielastic light scattering, small angle neutron scattering, and cryogenic transmission electron microscopy (cryoTEM). Branched micelles are formed close to the phase boundary and are more prevalent in CTAB-rich micelles. A shear-induced transition of cylindrical to ribbon-like micelles is observed by cryoTEM in CTAB-rich micelles near the phase boundary. A temperature-induced phase transition is observed for C12E3S-rich micelles due to the dehydration and/or conformational changes of the hydrophilic oxyethylene part of C12E3S in the mixed micelles.",

keywords = "Cryogenic transmission electron microscopy, Light scattering, Micellar branching, Neutron scattering, Worm-like micelles",

author = "Hassan, {P. A.} and Hodgdon, {Travis K.} and Masanobu Sagasaki and Gerhard Fritz-Popovski and Kaler, {Eric W.}",

note = "Funding Information: P.A.H. is thankful to Dr. C. Manohar, Indian Institute of Technology, Mumbai, India for fruitful discussions. This work was supported by National Science Foundation grant CBET-0436195 and the National Institute of Standards and Technology. ",

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language = "English (US)",

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T1 - Phase behavior and microstructure evolution in aqueous mixtures of cetyltrimethylammonium bromide and sodium dodecyl tri-oxyethylene sulfate

AU - Hassan, P. A.

AU - Hodgdon, Travis K.

AU - Sagasaki, Masanobu

AU - Fritz-Popovski, Gerhard

AU - Kaler, Eric W.

N1 - Funding Information: P.A.H. is thankful to Dr. C. Manohar, Indian Institute of Technology, Mumbai, India for fruitful discussions. This work was supported by National Science Foundation grant CBET-0436195 and the National Institute of Standards and Technology.

PY - 2009/1

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N2 - The phase behavior and microstructural changes in aqueous mixtures of cetyltrimethylammonium bromide (CTAB) and sodium dodecyl tri-oxyethylene sulfate (C12E3S) are reported. The mixing behavior of the two surfactants is investigated via surface tension measurements and the regular solution approximation yielded a β value of -13, indicating attractive interaction. The difference in the growth behavior of the micelles on the CTAB-rich and C12E3S-rich sides of the phase diagram is studied using viscosity, quasielastic light scattering, small angle neutron scattering, and cryogenic transmission electron microscopy (cryoTEM). Branched micelles are formed close to the phase boundary and are more prevalent in CTAB-rich micelles. A shear-induced transition of cylindrical to ribbon-like micelles is observed by cryoTEM in CTAB-rich micelles near the phase boundary. A temperature-induced phase transition is observed for C12E3S-rich micelles due to the dehydration and/or conformational changes of the hydrophilic oxyethylene part of C12E3S in the mixed micelles.

AB - The phase behavior and microstructural changes in aqueous mixtures of cetyltrimethylammonium bromide (CTAB) and sodium dodecyl tri-oxyethylene sulfate (C12E3S) are reported. The mixing behavior of the two surfactants is investigated via surface tension measurements and the regular solution approximation yielded a β value of -13, indicating attractive interaction. The difference in the growth behavior of the micelles on the CTAB-rich and C12E3S-rich sides of the phase diagram is studied using viscosity, quasielastic light scattering, small angle neutron scattering, and cryogenic transmission electron microscopy (cryoTEM). Branched micelles are formed close to the phase boundary and are more prevalent in CTAB-rich micelles. A shear-induced transition of cylindrical to ribbon-like micelles is observed by cryoTEM in CTAB-rich micelles near the phase boundary. A temperature-induced phase transition is observed for C12E3S-rich micelles due to the dehydration and/or conformational changes of the hydrophilic oxyethylene part of C12E3S in the mixed micelles.

KW - Cryogenic transmission electron microscopy

KW - Light scattering

KW - Micellar branching

KW - Neutron scattering

KW - Worm-like micelles

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Phase behavior and microstructure evolution in aqueous mixtures of cetyltrimethylammonium bromide and sodium dodecyl tri-oxyethylene sulfate

Abstract

Bibliographical note

Keywords

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