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Not All Anionic Polyelectrolytes Complex with DTAB
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DOI：10.1021/la900563y.png)
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摘要
En 中文
The influence of hydroxypropyl guar (HPG), with and without boric acid, on dodecyltrimethyl ammonium bromide (DTAB) micellization was characterized by surface tension measurements, isothermal titration calorimetry, and small-angle neutron scattering. Although HPG is a nonionic water-soluble polymer, borate ions form weak bonds with HPG, transforming it into ail anionic polyelectrolyte, HPG-borate. Surprisingly, the three independent measurements showed that HPG-borate does not promote DTAB micellization or phase separation normally seen when mixing oppositely charged polyelectrolytes and surfactants. However, the neutron scattering results suggested that HPG-borate binds to and flocculates existing DTAB micelles. The unusual behavior of HPG-borate with DTAB was underscored by showing that carboxymethyl guar (CMG) formed precipitates with DTAB.
Keyword:
SODIUM DODECYL-SULFATE
AIR-SOLUTION INTERFACE
OPPOSITELY CHARGED SURFACTANTS
HYDROXYPROPYL GUAR-BORATE
GALACTOMANNAN-BASED GELS
WATER-SOLUBLE POLYMERS
RHEOLOGICAL PROPERTIES
CATIONIC SURFACTANTS
ADSORPTION BEHAVIOR
ION COMPLEXATION
期刊
IF:
3.9
论文数:
5.4W
被引数:
10.6W
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The rheological characterization of HPG gels: Measurement of slip velocities in capillary tubes
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