NDLI: Properties of white birch (Betula papyrifera) outer bark particleboards with reinforcement of coarse wood particles in the core layer

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Properties of white birch (Betula papyrifera) outer bark particleboards with reinforcement of coarse wood particles in the core layer

Content Provider	Springer Nature Link
Author	Pedieu, Roger Riedl, Bernard Pichette, André
Copyright Year	2008
Abstract	• This study proposes substituting traditional raw materials in the surface layers of wood particle-boards with the water resistant white birch (Betula papyrifera) outer bark particles, which can help improve the dimensional stability of manufactured mixed particleboards, thereby alleviating shortages of raw material in a cost-efficient manner. • Mixed particleboards were fabricated in the laboratory using untreated or alkali treated white birch outer bark particles as substitute material. These particles were resinated successively with three percentages of phenol-formaldehyde resin. Overall, the results of this study clearly demonstrate that the panels could be manufactured using up to 45% of the proposed substitute material and still maintain the required mechanical and physical properties. • Alkali treatment was used to remove natural wax from bark particles surface which hinders resin adhesion. This treatment negatively affected mechanical and physical properties of finished panels and the variation of phenol-formaldehyde resin percentage in the bark particles significantly affected only their hardness. • Panel with untreated bark particles in the surface layers, resinated with 5% phenol-formaldehyde resin was selected as the best with the help of a statistical analysis carried out in a factorial complete block design, especially from the dimensional stability criterion. • L’objet de cette étude est de substituer la matière première traditionnelle dans les couches couvrantes des panneaux de particules conventionnelles par les particules hydrophobes d’écorce externe de bouleau blanc (Betula papyrifera) qui peuvent aider à améliorer la stabilité dimensionnelle des panneaux mixtes produits et ainsi permettre d’alléger la pénurie de la matière première d’une manière rentable. • Les panneaux de particules mixtes ont été fabriqués à l’échelle du laboratoire en utilisant les particules d’écorce externe de bouleau blanc non traitées ou traitées à la soude comme matériel de substitution. Ces particules ont été encollées successivement avec trois pourcentages de colle phénol-formaldéhyde. Les résultats de cette étude démontrent d’un bout à l’autre que les panneaux pourraient être fabriqués en utilisant jusqu’à 45 % de matière de substitution proposée et maintenir toujours les exigences des propriétés mécaniques et physiques. • Le traitement à la soude a été utilisé afin d’enlever la cire naturelle de la surface des écorces qui empêche l’adhésion de la colle. Ce traitement a affecté négativement les propriétés mécaniques et physiques des panneaux produits et la variation du pourcentage de la colle phénol-formaldéhyde dans les particules d’écorce a affecté leur dureté de manière hautement significative. • Le panneau avec les particules d’écorce non traitées dans les couches couvrantes et encollées avec 5 % de phénol-formaldéhyde a été sélectionné comme le meilleur à l’aide d’une analyse statistique faite dans un plan factoriel en blocs complets, en se basant sur le critère de la stabilité dimensionnelle.
Starting Page	701
Ending Page	701
Page Count	1
File Format	PDF
ISSN	12864560
Journal	Annals of Forest Science
Volume Number	65
Issue Number	7
e-ISSN	1297966X
Language	French
Publisher	Springer Netherlands
Publisher Date	2008-01-01
Publisher Institution	Institut National de la Recherche Agronomique (INRA)
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	écorce externe de bouleau blanc panneaux mixtes propriétés mécaniques propriétés physiques traitement à la soude Forestry Wood Science & Technology Forestry Management Tree Biology Environment
Content Type	Text
Resource Type	Article
Subject	Ecology Forestry

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Properties of white birch (Betula papyrifera) outer bark particleboards with reinforcement of coarse wood particles in the core layer

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Properties of white birch (Betula papyrifera) outer bark particleboards with reinforcement of coarse wood particles in the core layer

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Properties of white birch (Betula papyrifera) outer bark particleboards with reinforcement of coarse wood particles in the core layer