Cationised O-acetyl galactoglucomannans: synthesis and characterisation

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Victor Kisonen, Chunlin Xu, Patrik Eklund, Hanna Lindqvist, Anna Sundberg, Andrey Pranovich, Jari Sinkkonen, Francisco Vilaplana, Stefan Willför
Publication year: 2014
Journal: Carbohydrate Polymers
Journal acronym: Carbohydr Polym
Volume number: 99
Start page: 755
End page: 764
ISSN: 1879-1344
eISSN: 1879-1344


Water-soluble O-acetyl-galactoglucomannans (GGMs) can be obtained from Norway spruce by hot-water-extraction of the wood or as a side product by ultrafiltration of mechanical pulping waters. Cationic and amphiphilic polysaccharides and their derivatives are of interest for a number of applications and thus quaternary nitrogen moieties with cationic charge were grafted onto GGMs in the heterogeneous reaction to render a cationic polyelectrolyte. The degree of substitution was measured by elemental analysis of nitrogen, by quantitative (13)C NMR and interestingly also by polyelectrolyte titration and the results were congruent. NMR, matrix-assisted laser desorption/ionisation mass spectroscopy (MALDI-TOF-MS), and FT-IR analysis were used to characterise the product. THF or DMSO with water enhanced the reaction efficiency and decreased M(w) reduction in comparison to plain water as a reaction media. Cationised GGM was also successfully acetylated. The cationic derivatives of hemicelluloses can potentially be utilised as polyelectrolyte layers in packaging and pharmaceutical applications.

Last updated on 2020-24-02 at 03:23