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

Victor Kisonen, Patrik Christoffer Eklund, Markku Auer, Rainer Sjöholm, Andrey Pranovich, Jarl Hemming, Anna Sundberg, Vladimir Aseyev, Stefan Willför

    Research output: Contribution to journalArticleScientificpeer-review

    24 Citations (Scopus)

    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.
    Original languageUndefined/Unknown
    Pages (from-to)151–158
    JournalCarbohydrate Research
    Volume352
    DOIs
    Publication statusPublished - 2012
    MoE publication typeA1 Journal article-refereed

    Keywords

    • hemicelluloses
    • Galactoglucomannans
    • Hydrophobication
    • Esterification

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