Effect of monomer concentration on swelling characteristics of hydrogels

Anupama, Rajesh Kumar, Balraj S. Parmar

Research output: Contribution to journalArticlepeer-review

Abstract

An experiment was conducted during 2000-2001 to study the effect of monomer concentration on swelling characteristics of grafted hydrogels. Six series of hydrogels synthesized by grafting acrylamide (monomer) on 6 natural polymer backbones, viz katira, carboxy methyl cellulose-sodium salt, tragacanth gum, gelatin, pectin and starch, revealed that the per cent add-on increased with monomer concentration. Except starch-g-PAam, per cent swelling was at its maximum at lower monomer concentrations but decreased at higher concentrations of monomer. In case of starch-g-PAam, swelling increased from 483% to 843% at 30°C with an increase in monomer concentration from 7.04 mmol to 70.40 mmol. The maximum swelling was found to be a function of the composition of the backbone, concentration of the grafted monomer and the temperature of the environment.

Original languageEnglish
Pages (from-to)493-495
Number of pages3
JournalIndian Journal of Agricultural Sciences
Volume72
Issue number8
StatePublished - 1 Aug 2002
Externally publishedYes

Keywords

  • Grafting
  • Hydrogels
  • Moisture retention
  • Monomer
  • Natural polymers
  • Polymer chemistry
  • Swelling

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