Rheological characterizations of concentrated binary gum mixtures with xanthan gum and galactomannans

Wonjun Jo, June Ha Bak, Byoungseung Yoo

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

The steady and dynamic shear rheological properties of binary gum mixtures with xanthan gum (XG) and galactomannans (guar gum (GG) and locust bean gum (LBG)) were examined in a concentrated solution (1% w/w) as a function of gum mixing ratio (100/0, 75/25, 50/50, and 0/100). All samples, except for individual GG and LBG, showed high shear-thinning behavior with yield stress. The values of flow (K, ηa,50, and σoc) and dynamic rheological parameters (G′ and G″) of XG-GG and XG-LBG mixtures were significantly higher compared to XG alone, indicating that the flow and viscoelastic properties of binary gum mixtures were greatly affected by the addition of GG and LBG. The maximum elasticity synergistic interaction for XG-galactomannans mixtures was observed at a mixing ratio of 50/50, showing a greatly positive deviation between measured and calculated values of G′. These results suggest that the synergistic effect of GG and LBG addition on rheological properties of XG appears to be due to intermolecular interaction occurred between XG and galactomannans, as confirmed by dynamic rheological properties.

Original languageEnglish
Pages (from-to)263-269
Number of pages7
JournalInternational Journal of Biological Macromolecules
Volume114
DOIs
StatePublished - 15 Jul 2018

Keywords

  • Galactomannans
  • Rheology
  • Synergistic effect
  • Thickener
  • Xanthan gum

Fingerprint

Dive into the research topics of 'Rheological characterizations of concentrated binary gum mixtures with xanthan gum and galactomannans'. Together they form a unique fingerprint.

Cite this