The effect of salt on the association between linear cationic polyelectrolytes and sodium dodecyl sulfate

Ágnes Ábrahám, Amália Mezei, R. Mészáros

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The aggregation of polyelectrolyte-surfactant particles has been investigated at large excess of the surfactant in the presence of NaCl using coagulation kinetics, electrophoretic mobility and dynamic light scattering measurements. The investigated systems were mixtures of sodium dodecyl sulfate (SDS) with poly(vinylamine) (PVAm) as well as with poly(diallyldimethylammonium chloride) (PDAC). The observed variation of the initial rate of coagulation with NaCl concentration of PVAm-SDS and PDAC-SDS particles is in qualitative agreement with the predictions of DLVO theory. This finding provides evidence for the formation of electrostatically stabilized colloid dispersions in the investigated composition range of these mixtures. The kinetic stability of these dispersions increases with increasing SDS concentration and polyelectrolyte charge. The colloid dispersion nature of polyelectrolyte-surfactant mixtures has important consequences with respect to the surface and phase behaviour of these systems in the presence of supporting electrolyte.

Original languageEnglish
Pages (from-to)3718-3726
Number of pages9
JournalSoft Matter
Volume5
Issue number19
DOIs
Publication statusPublished - 2009

Fingerprint

sodium sulfates
Sodium Dodecyl Sulfate
Salts
Polyelectrolytes
Association reactions
Surface-Active Agents
salts
surfactants
Colloids
coagulation
Coagulation
Dispersions
colloids
chlorides
Electrophoretic mobility
Kinetics
kinetics
Dynamic light scattering
Phase behavior
Electrolytes

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

The effect of salt on the association between linear cationic polyelectrolytes and sodium dodecyl sulfate. / Ábrahám, Ágnes; Mezei, Amália; Mészáros, R.

In: Soft Matter, Vol. 5, No. 19, 2009, p. 3718-3726.

Research output: Contribution to journalArticle

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