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

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Victor Kisonen, Patrik Eklund, Markku Auer, Rainer Sjöholm, Andrey Pranovich, Jarl Hemming , Anna Sundberg, Vladimir Aseyev, Stefan Willför
Publiceringsår: 2012
Tidskrift: Carbohydrate Research
Volym: 352
Artikelns första sida, sidnummer: 151
Artikelns sista sida, sidnummer: 158


Abstrakt

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.


Nyckelord

Esterification, Galactoglucomannans, hemicelluloses, Hydrophobication

Senast uppdaterad 2019-09-12 vid 03:41