Associative and segregative phase behaviour of a mixed aqueous cationic surfactant and anionic hydrophilic polymer system

Stig Hellebust; Anne Marit Blokhus; Svante Nilsson

doi:10.1016/j.colsurfa.2004.06.002

Associative and segregative phase behaviour of a mixed aqueous cationic surfactant and anionic hydrophilic polymer system

Stig Hellebust
, Anne Marit Blokhus
, Svante Nilsson

School of Chemistry

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

Abstract

The phase behaviour of a mixture of a highly charged hydrophilic polymer, dextran sulphate sodium salt, and a cationic surfactant, tetradecyltrimethylammonium bromide, was investigated in aqueous solution of different ionic strengths. The system has the interesting and novel property that at certain ionic strengths it displays both segregative and associative phase behaviour separated by a single-phase region within the same phase diagram. By increasing the ionic strength further the segregative area increases and the associative area disappears. In addition, the effect of cosolutes n-octane and 1-octanol on the above-mentioned phase behaviour has been studied. The effect of the former was to increase the miscibility and the latter to decrease the miscibility.

Original language	English
Pages (from-to)	133-138
Number of pages	6
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	243
Issue number	1-3
DOIs	https://doi.org/10.1016/j.colsurfa.2004.06.002
Publication status	Published - 20 Aug 2004

Keywords

Associative phase behaviour
Dextran sulfate
DxS
Micellar cosolutes
Polymer-surfactant mixtures
Segregative phase behaviour
Tetradecyltrimethylammoniumbromide
TTAB

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10.1016/j.colsurfa.2004.06.002

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title = "Associative and segregative phase behaviour of a mixed aqueous cationic surfactant and anionic hydrophilic polymer system",

abstract = "The phase behaviour of a mixture of a highly charged hydrophilic polymer, dextran sulphate sodium salt, and a cationic surfactant, tetradecyltrimethylammonium bromide, was investigated in aqueous solution of different ionic strengths. The system has the interesting and novel property that at certain ionic strengths it displays both segregative and associative phase behaviour separated by a single-phase region within the same phase diagram. By increasing the ionic strength further the segregative area increases and the associative area disappears. In addition, the effect of cosolutes n-octane and 1-octanol on the above-mentioned phase behaviour has been studied. The effect of the former was to increase the miscibility and the latter to decrease the miscibility.",

keywords = "Associative phase behaviour, Dextran sulfate, DxS, Micellar cosolutes, Polymer-surfactant mixtures, Segregative phase behaviour, Tetradecyltrimethylammoniumbromide, TTAB",

author = "Stig Hellebust and Blokhus, \{Anne Marit\} and Svante Nilsson",

year = "2004",

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doi = "10.1016/j.colsurfa.2004.06.002",

language = "English",

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TY - JOUR

T1 - Associative and segregative phase behaviour of a mixed aqueous cationic surfactant and anionic hydrophilic polymer system

AU - Hellebust, Stig

AU - Blokhus, Anne Marit

AU - Nilsson, Svante

PY - 2004/8/20

Y1 - 2004/8/20

N2 - The phase behaviour of a mixture of a highly charged hydrophilic polymer, dextran sulphate sodium salt, and a cationic surfactant, tetradecyltrimethylammonium bromide, was investigated in aqueous solution of different ionic strengths. The system has the interesting and novel property that at certain ionic strengths it displays both segregative and associative phase behaviour separated by a single-phase region within the same phase diagram. By increasing the ionic strength further the segregative area increases and the associative area disappears. In addition, the effect of cosolutes n-octane and 1-octanol on the above-mentioned phase behaviour has been studied. The effect of the former was to increase the miscibility and the latter to decrease the miscibility.

AB - The phase behaviour of a mixture of a highly charged hydrophilic polymer, dextran sulphate sodium salt, and a cationic surfactant, tetradecyltrimethylammonium bromide, was investigated in aqueous solution of different ionic strengths. The system has the interesting and novel property that at certain ionic strengths it displays both segregative and associative phase behaviour separated by a single-phase region within the same phase diagram. By increasing the ionic strength further the segregative area increases and the associative area disappears. In addition, the effect of cosolutes n-octane and 1-octanol on the above-mentioned phase behaviour has been studied. The effect of the former was to increase the miscibility and the latter to decrease the miscibility.

KW - Associative phase behaviour

KW - Dextran sulfate

KW - DxS

KW - Micellar cosolutes

KW - Polymer-surfactant mixtures

KW - Segregative phase behaviour

KW - Tetradecyltrimethylammoniumbromide

KW - TTAB

UR - https://www.scopus.com/pages/publications/4143137574

U2 - 10.1016/j.colsurfa.2004.06.002

DO - 10.1016/j.colsurfa.2004.06.002

M3 - Article

AN - SCOPUS:4143137574

SN - 0927-7757

VL - 243

SP - 133

EP - 138

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

IS - 1-3

ER -

Associative and segregative phase behaviour of a mixed aqueous cationic surfactant and anionic hydrophilic polymer system

Abstract

Keywords

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