Effect of mixing on the formation of complexes of hyperbranched cationic polyelectrolytes and anionic surfactants

Amália Mezei, R. Mészáros, Imre Varga, T. Gilányi

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

The effect of different mixing protocols on the charged nature and size distribution of the aqueous complexes of hyperbranched poly(ethylene imine) (PEI) and sodium dodecyl sulfate (SDS) was investigated by electrophoretic mobility and dynamic light scattering measurements at different pH values, polyelectrolyte concentrations, and ionic strengths. It was found that at large excess of the surfactant a colloidal dispersion of individual PEI/SDS nanoparticles forms via an extremely rapid mixing of the components by means of a stop-flow apparatus. However, the application of a less efficient mixing method under the same experimental conditions might result in large clusters of the individual PEI/SDS particles as well as in a more extended precipitation regime compared with the results of stop-flow mixing protocol. The study revealed that the larger the charge density and concentration of the PEI, the more pronounced the effect of mixing becomes. It can be concluded that an efficient way to avoid precipitation in the solutions of oppositely charged polyelectrolytes and surfactants might be provided by extending the range of kinetically stable colloidal dispersion of polyelectrolyte/surfactant nanoparticles via the application of appropriate mixing protocols.

Original languageEnglish
Pages (from-to)4237-4247
Number of pages11
JournalLangmuir
Volume23
Issue number8
DOIs
Publication statusPublished - Apr 10 2007

Fingerprint

Anionic surfactants
Polyelectrolytes
Polyetherimides
surfactants
Sodium dodecyl sulfate
sodium sulfates
Surface-Active Agents
Sodium Dodecyl Sulfate
Surface active agents
Nanoparticles
Electrophoretic mobility
nanoparticles
Dynamic light scattering
Ionic strength
Charge density
imines
polycations
Ethylene
ethylene
light scattering

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Effect of mixing on the formation of complexes of hyperbranched cationic polyelectrolytes and anionic surfactants. / Mezei, Amália; Mészáros, R.; Varga, Imre; Gilányi, T.

In: Langmuir, Vol. 23, No. 8, 10.04.2007, p. 4237-4247.

Research output: Contribution to journalArticle

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