Ion-exchange foam chromatography. Part I. Preparation of rigid and flexible ion-exchange foams

T. Braun, O. Békeffy, I. Haklits, K. Kádár, G. Majoros

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19 Citations (Scopus)

Abstract

In order to be able to apply the principles of foam chromatography to ion-exchange processes, preparative methods for open-cell ion-exchange foams, were investigated. Homogeneous ion-exchange foams were prepared by introducing ion-exchange groups on previously prepared phenol-formaldehyde, polyurethane and polyethylene foams. The maximum capacity of the produced sulfonated phenol-formaldehyde cation-exchange foams was 1.85 meq g-1; that of the styrene-polyurethane interpolymer anion-exchange foams was 2.2 meq g-1. Weak carboxylic ion-exchange foams were prepared by radiation grafting of polyurethane and polyethylene foams; the maximum capacity of these foams was 4.02 meq g-1. Heterogeneous ion-exchange foams were prepared by foaming a fine powder of a commercially available cation exchanger with the precursors of open-cell polyether-type polyurethane foam. The capacity of such a foam containing 26% ion-exchange powder was 1.0 meq g-1. The kinetics of the cation-exchange process on the heterogeneous foams was measured with 85Sr.

Original languageEnglish
Pages (from-to)45-54
Number of pages10
JournalAnalytica Chimica Acta
Volume64
Issue number1
DOIs
Publication statusPublished - Mar 1973

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy

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