Sulfoethylation of polysaccharides-A comparative study

Carbohydr Polym. 2020 Oct 15:246:116533. doi: 10.1016/j.carbpol.2020.116533. Epub 2020 Jun 5.

Abstract

The heterogeneous sulfoethylation of cellulose, xylan, α-1,3-glucan, glucomannan, pullulan, curdlan, galactoglucomannan, and agarose was studied using sodium vinylsulfonate (NaVS) as reagent in presence of sodium hydroxide and iso-propanol (i-PrOH) as slurry medium. The influence of the concentration of polymer, water, and NaOH (solid or aqueous solution) on the degree of substitution (DS) was investigated. The sulfoethylation rendered the polysaccharides studied water-soluble. Sulfoethylation of heteropolysaccharides yielded products with higher DS compared to the conversion of homopolysaccharides. Structure characterization was carried out by means of 13C-NMR spectroscopy.

Keywords: Ether; Heteropolysaccharides; Homopolysaccharides; NMR; Solubility; Sulfoethylation.

Publication types

  • Comparative Study

MeSH terms

  • 2-Propanol / chemistry
  • Carbon-13 Magnetic Resonance Spectroscopy / methods
  • Cellulose / chemistry*
  • Dimethyl Sulfoxide / chemistry
  • Glucans / chemistry*
  • Mannans / chemistry*
  • Sepharose / chemistry*
  • Sodium Hydroxide / chemistry
  • Solubility
  • Water / chemistry
  • Xylans / chemistry*
  • beta-Glucans / chemistry*

Substances

  • Glucans
  • Mannans
  • Xylans
  • beta-Glucans
  • galactoglucomannan
  • Water
  • (1-6)-alpha-glucomannan
  • Sodium Hydroxide
  • curdlan
  • pullulan
  • Cellulose
  • Sepharose
  • alpha-1,3-glucan
  • 2-Propanol
  • Dimethyl Sulfoxide