Adsorption of polyethyleneimine from aqueous solutions on bentonite clays

Nevin Öztekin, Ayşe Alemdar, Nurfer Güngör, F. Bedia Erim

Research output: Contribution to journalArticlepeer-review

72 Citations (Scopus)

Abstract

The adsorption of the cationic polymer, polyethyleneimine (PEI), on bentonite clay particles was investigated. The adsorption rates for the bentonite suspensions are very fast. The high affinity type of interactions between PEI and bentonite samples is attributed to the electrostatic interaction between the clay particles in ambient basic suspensions and the positively charged high molecular weight polyelectrolyte. The adsorption capacity and the influence of the polyelectrolyte on the rheological behavior change with the exchangeable ions, i.e. Na and Ca ions of the bentonite samples.

Original languageEnglish
Pages (from-to)73-76
Number of pages4
JournalMaterials Letters
Volume55
Issue number1-2
DOIs
Publication statusPublished - Jul 2002

Keywords

  • Bentonite
  • Cationic polymer
  • Polyethyleneimine
  • Rheology

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