Structural properties and foaming of plant cell wall polysaccharide dispersions

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    5 Citations (Scopus)

    Abstract

    Water suspensions of cellulose nanofibres with xylan, xyloglucan and pectin were studied for foaming and structural properties as a new means for food structuring. The dispersions were analysed with rheological measurements, microscopy and optical coherence tomography. A combination of xylan with TEMPO-oxidized nanocellulose produced a mixture with well-dispersed air bubbles, while the addition of pectin improved the elastic modulus, hardness and toughness of the structures. A similar structure was observed with native nanocellulose, but the elastic modulus was not as high. Shear flow caused cellulose nanofibres to form plate-like flocs in the suspension that accumulated near bubble interfaces. This tendency could be affected by adding laccase to the dispersion, but the effect was opposite for native and TEMPO-oxidized nanocellulose. Nanocellulose type also influenced the interactions between nanofibers and other polysaccharides. For example, xyloglucan interacted strongly with TEMPO-oxidized nanocellulose (high storage modulus) but not with native nanocellulose.
    Original languageEnglish
    Pages (from-to)508-518
    Number of pages11
    JournalCarbohydrate Polymers
    Volume173
    DOIs
    Publication statusPublished - 1 Oct 2017
    MoE publication typeA1 Journal article-refereed

    Keywords

    • polysaccharide
    • xylan
    • cellulose nanofibre
    • dispersion
    • bubble
    • structure

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