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Optimization of the Hot-Pressing Regime in the Production of Eco-Friendly Fibreboards Bonded with Hydrolysis Lignin

Periodica polytechnica. Chemical engineering., 2022-01, Vol.66 (1), p.125-134 [Peer Reviewed Journal]

Copyright Periodica Polytechnica, Budapest University of Technology and Economics 2022 ;ISSN: 0324-5853 ;EISSN: 1587-3765 ;DOI: 10.3311/PPch.18284

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  • Title:
    Optimization of the Hot-Pressing Regime in the Production of Eco-Friendly Fibreboards Bonded with Hydrolysis Lignin
  • Author: Valchev, Ivo ; Yordanov, Yvailo ; Savov, Viktor ; Antov, Petar
  • Subjects: Aldehydes ; Control boards ; Hydrolysis ; Lignin ; Mechanical properties ; Moisture content ; Optimization ; Phenol formaldehyde ; Physical properties ; Pressing ; Resins
  • Is Part Of: Periodica polytechnica. Chemical engineering., 2022-01, Vol.66 (1), p.125-134
  • Description: This research was aimed at studying the potential of using residual lignin from acid hydrolysis as a binder in manufacturing eco-friendly, dry-process fibreboards. For that purpose, a modification of the adhesive system and hot-pressing regime was conducted. The adhesive system applied was composed of 2 % phenol-formaldehyde (PF) resin and 10 % hydrolysis lignin (based on the dry fibres). The PF resin does not only act as a binder but generally contributes to the even distribution and good retention of the main binder – hydrolysis lignin. A specific hot-pressing cycle was used. In the first stage, the pressure was 1.0 MPa, followed by an increased pressure of 4.0 MPa, and subsequent cooling. The purpose of the initial lower pressure was softening the lignin and reduction of the material moisture content. The effect of the second stage of hot-pressing on the properties of eco-friendly fibreboards was investigated. It was determined that the fibreboards produced with 2 % PF resin and 10 % hydrolysis lignin have similar physical and mechanical properties to those of the control panels, produced with 10 % PF resin at a standard hot-pressing cycle. The findings of this work demonstrate that residual hydrolysis lignin can be effectively utilized as a binder in the production of eco-friendly, dry-process fibreboards with acceptable physical and mechanical properties.
  • Publisher: Budapest: Periodica Polytechnica, Budapest University of Technology and Economics
  • Language: English;German;Russian
  • Identifier: ISSN: 0324-5853
    EISSN: 1587-3765
    DOI: 10.3311/PPch.18284
  • Source: ProQuest Central
    DOAJ Directory of Open Access Journals
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