Utilization of lignin powder for manufacturing self-binding HDF

Ramunas Tupciauskas, Janis Gravitis, Janis Abolins, Andris Veveris, Martins Andzs, Tiina Liitiä, Tarja Tamminen

    Research output: Contribution to journalArticleScientificpeer-review

    6 Citations (Scopus)

    Abstract

    The preparation of self-binding lignocellulosic fibreboards has been investigated. Different high-density fibreboards (HDF) were hot-pressed based on a mixture of grey alder (Alnus incana L. Moench) wood chips processed by steam explosion auto-hydrolysis (SE) and 15% or 25% lignin content from three different industrial sources: softwood kraft lignin (SWKL), soda wheat straw lignin (SoWhStL) and hydrolysis wheat straw lignin (HWhStL). Density, thickness swelling (TS) after immersion in water for 24 h, modulus of rupture (MOR), modulus of elasticity (MOE) and strength of internal bond (IB) of the board samples were determined. The amount (15% or 25%) and moisture content (MC) (18±1% or 5±2%) of the added lignin affected all the tested properties of the HDF except for density. However, the kind of the added lignin affects the obtained fibreboard more significantly compared to the control sample made without an admixture of lignin. In some cases, the tested values were diminished to half. The tested properties of the HDF samples produced with SoWhStL or HWhStL are compatible with standard requirements for medium-density fibreboard (MDF) for general use under dry conditions (EN 622-5, MDF), however, it depends on the lignin amount and MC.
    Original languageEnglish
    Pages (from-to)555-561
    JournalHolzforschung
    Volume71
    Issue number7-8
    DOIs
    Publication statusPublished - 26 Jul 2017
    MoE publication typeA1 Journal article-refereed

    Keywords

    • grey alder
    • industrial lignins
    • self-binding fibreboards
    • steam explosion auto-hydrolysis

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