Not All Anionic Polyelectrolytes Complex with DTAB Journal Articles

abstract

• 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 an 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.

authors

• Cui, Yuguo
• Pelton, Robert
• Cosgrove, Terence
• Richardson, Robert
• Dai, Sheng
• Prescott, Stuart
• Grillo, Isabelle
• Ketelson, Howard
• Meadows, David

status

• published 

publication date

• December 15, 2009

has subject area

• Chemical Physics (Science Metrix)

published in

• Langmuir  Journal

keywords

• ADSORPTION BEHAVIOR
• AIR-SOLUTION INTERFACE
• CATIONIC SURFACTANTS
• Chemistry
• Chemistry, Multidisciplinary
• Chemistry, Physical
• GALACTOMANNAN-BASED GELS
• HYDROXYPROPYL GUAR-BORATE
• ION COMPLEXATION
• Materials Science
• Materials Science, Multidisciplinary
• OPPOSITELY CHARGED SURFACTANTS
• Physical Sciences
• RHEOLOGICAL PROPERTIES
• SODIUM DODECYL-SULFATE
• Science & Technology
• Technology
• WATER-SOLUBLE POLYMERS

Digital Object Identifier (DOI)

• 10.1021/la900563y

PubMed ID

• 19466812

start page

• 13712

end page

• 13717

volume

• 25

issue

• 24