Stability and deposition tendency of colloidal wood resin

Anna-Liisa Sihvonen, Kenneth Sundberg, Anna Sundberg, Bjarne Holmbom

    Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

    72 Citeringar (Scopus)

    Sammanfattning

    The influence of the chemical composition of dispersed wood resin obtained from Norway spruce and Scots pine on its colloidal stability and deposition tendency was studied. The ability of dissolved glucomannans to stabilise colloidal resin against aggregation with simple electrolytes was also examined. Free fatty acids increased the stability of wood resin against aggregation at pH 5. At pH 8 no significant differences in the stability between different compositions were found, except for the dispersion of resin from pine heartwood, which was considerably more stable against NaCl additions than other dispersions. Different preparations of glucomannans were shown to be effective stabilisers of colloidal wood resin against aggregation as well as deposition (at pH 5). Additions of free fatty acids increased the deposition tendency at pH 5, but decreased the deposition tendency at pH 8, when CaCl2 was not present in the dispersions. The addition of CaCl2 increased the amount of deposit both at pH 5 and pH 8.
    OriginalspråkOdefinierat/okänt
    Sidor (från-till)64–67
    Antal sidor4
    TidskriftNordic Pulp and Paper Research Journal
    Volym13
    Utgåva1
    DOI
    StatusPublicerad - 1998
    MoE-publikationstypA1 Tidskriftsartikel-refererad

    Nyckelord

    • colloidal stability
    • deposition tendency
    • electrolytes
    • fatty acids
    • glucomannans
    • resin acids
    • wood resin

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