Metal complexes of amphoteric cryogels based on allylamine and methacrylic acid

Gulnur S. Tatykhanova, Zhansaya K. Sadakbayeva, Dmitriy Berillo, Igor Galaev, Khabib A. Abdullin, Zheksenbek Adilov, Sarkyt E. Kudaibergenov

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A series of macroporous amphoteric cryogels based on allylamine, methacrylic acid and acrylamide were synthesized by radical copolymerization of monomers in cryoconditions. The average molar composition of amphoteric cryogels was found from the potentiometric and conductimetric titration curves. The morphology of cryogels was evaluated by SEM. Cryogels are highly elastic and have continuous macroporous structure with 50-200 μm pores. The values of the isoelectric pH determined from the swelling experiments arranged between 3.5 and 4.3. Complexation of amphoteric with transition metal ions was studied. Cryogels with adsorbed copper, nickel, or cobalt ions have an intense colour due to formation of coordination and ionic bonds between metal ions and amine and/or carboxylic groups of cryogels. Metal ions entrapped within the pores of cryogels were reduced by treating aqueous solution of NaBH 4. Formation of micron sized metals on the inner surface of cryogels was observed by SEM.

Original languageEnglish
Pages (from-to)18-27
Number of pages10
JournalMacromolecular Symposia
Volume317-318
Issue number1
DOIs
Publication statusPublished - Aug 1 2012

Keywords

  • amphoteric cryogels
  • catalysis
  • macroporous polymers
  • metal-polymer complexes
  • swelling

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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