Physico-chemical characterization of spruce galactoglucomannan solutions: Stability, surface activity and rheology

Chunlin Xu*, Stefan Willför, Kenneth Sundberg, Charlotte Petterson, Bjarne Holmbom

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

57 Citations (Scopus)

Abstract

The physico-chemical properties of the industrially-recovered spruce galactoglucomannans were studied. The solubility after filtration was determined by GC. Short- and long-time stability of galactoglucomannan water solutions of different concentrations was investigated with a light-scattering-based Turbiscan instrument. The effects of filtration, NaCl addition, heat treatment and deacetylation on stability were studied. During the measurements, commercial Konjac glucomannan was studied for the sake of comparison. The surface activity and apparent viscosity of galactoglucomannan solutions were also studied. Additionally, the rheological properties of the solutions were investigated. Both storage and loss moduli increased at concentrations higher than 1%. Elastic behavior was displayed throughout the frequency, at high concentration. Concentration regimes with three regions were applied to explain the solution properties.

Original languageEnglish
Pages (from-to)51-62
Number of pages12
JournalCellulose Chemistry and Technology
Volume41
Issue number1
Publication statusPublished - Jan 2008
MoE publication typeA1 Journal article-refereed

Keywords

  • Rheological properties
  • Solution properties
  • Spruce galactoglucomannan
  • Stability
  • Surface activity

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