Synthesis and characterization of cationized latexes in dilute suspensions

Jarl B. Rosenholm, Jan Nylund, Bengt Stenlund

Research output: Contribution to journalArticleScientificpeer-review

17 Citations (Scopus)

Abstract

The cationization of polystyrene lattices with the emulsifiers dodecylbenzyldimethylammoniumchloride (LDB) and hexadecylvinylbenzyldimethylammoniumchloride (CVDAC) has been investigated. The synthesized lattices were characterized by measuring the size, the surface charge density and the electrophoretic mobility in dilute suspensions. The surface charge was investigated further by recording the stability of the latex against mono-, di- and trivalent anions and cations. The dependence of the ζ-potential on the ions is discussed with reference to the Schulze-Hardy rule and the Hofmeister (lyotropic) series. It was found, as expected, that the properties could be explained primarily by the valency of the charge of the counterions, but that the interaction of the latex with the cocations also plays a significant role. Comparing the results of the potentiometric titration and the electrophoretic mobility it was found that the emulsifier in excess of charge neutralization seems to be largely removed during the rigorous washing and ion exchange sequences prior to the surface charge titrations.
Original languageEnglish
Pages (from-to)209-218
Number of pages10
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume159
Issue number1
DOIs
Publication statusPublished - 1999
MoE publication typeA1 Journal article-refereed

Keywords

  • Dodecylbenzyldimethylammoniumchloride (LDB)
  • Hexadecylvinylbenzyldimethylammoniumchloride (CVDAC)
  • Particle size
  • Polystyrene latex
  • Surface charge density
  • Suspension stability
  • ζ-Potential

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