Forces between surfaces in the presence of a cationic polyelectrolyte and an anionic surfactant

Bremmell, K. E., Jameson, G. J. and Biggs, S. (1999) Forces between surfaces in the presence of a cationic polyelectrolyte and an anionic surfactant. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 155 1: 1-10. doi:10.1016/S0927-7757(98)00394-X


Author Bremmell, K. E.
Jameson, G. J.
Biggs, S.
Title Forces between surfaces in the presence of a cationic polyelectrolyte and an anionic surfactant
Journal name Colloids and Surfaces A: Physicochemical and Engineering Aspects   Check publisher's open access policy
ISSN 0927-7757
1873-4359
Publication date 1999-09-15
Year available 1999
Sub-type Article (original research)
DOI 10.1016/S0927-7757(98)00394-X
Open Access Status
Volume 155
Issue 1
Start page 1
End page 10
Total pages 10
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Abstract An atomic force microscope has been used to investigate the interaction forces between a mica surface and a colloidal glass sphere in the presence of a high molecular weight cationic polyelectrolyte, and the anionic surfactant sodium dodecylbenzenesulfonate (SDbS). The effect of addition of SDbS on the interaction forces between the polyelectrolyte coated surfaces was investigated. At low concentrations of SDbS the electrostatic repulsion initially present was progressively neutralized as a function of increasing surfactant concentration. Neutralization resulted in a strong attraction between the surfaces. As the SDbS concentration was increased further, additional surfactant association took place and the surfaces were recharged. At these surfactant concentrations the surfaces became less attractive at small separations. At high SDbS concentrations the interaction profile became purely repulsive as the surfaces were recharged. Diffuse double layer potentials derived from the direct force measurement data correlated well with zeta-potential measurements of silica particles treated with the polyelectrolyte and surfactant. Particulate stability behaviour was also seen to compare well with the force measurement and electrostatic potential data.
Keyword Atomic force microscope (AFM)
Polyelectrolyte/surfactant
Stability
Surface forces
Zeta-potential
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Faculty of Engineering, Architecture and Information Technology Publications
Non HERDC
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 29 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 28 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Fri, 13 Jun 2014, 19:31:28 EST by System User on behalf of Faculty Of Engineering, Architecture & Info Tech