Hydrophobication and characterisation of O-acetyl-galactoglucomannan for
papermaking and barrier applications

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Victor Kisonen, Patrik Eklund, Markku Auer, Rainer Sjöholm, Andrey Pranovich, Jarl Hemming , Anna Sundberg, Vladimir Aseyev, Stefan Willför
Publication year: 2012
Journal: Carbohydrate Research
Volume number: 352
Start page: 151
End page: 158


Abstract

Norway spruce O-acetyl-galactoglucomannans (GGM) are water-soluble hemicelluloses that have potential to be produced in large scale as a side product of the mechanical pulping industry or by hot-water extraction of wood. Chemical modification is often needed to tailor such water-soluble polysaccharides into industrially valuable compounds. In this work, treatment of GGM with butyric and benzoic anhydride in pyridine/dimethylformamide rendered GGM derivatives, which were hydrophobic and partially soluble in organic solvents. The degree of substitution can be adjusted by varying the quantity of the reagent and reaction temperature. The dn/dc value for the benzoyl ester of GGM was determined in 0.05 M LiBr DMSO in order to obtain accurate molar mass analysis with SEC-MALLS-RI. Novel substances with adjusted hydrophobicity can thus be prepared on one step synthesis from natural hemicelluloses, which then showed a slight increase in the molar mass upon esterification.


Keywords

Esterification, Galactoglucomannans, hemicelluloses, Hydrophobication

Last updated on 2019-22-09 at 04:54