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Changes in wettability of heat-treated wood due to artificial weathering

Huang Xianai, Kocaefe Duygu, Kocaefe Yasar S., Boluk Yaman et Pichette André. (2012). Changes in wettability of heat-treated wood due to artificial weathering. Wood Science and Technology, 46, (6), p. 1215-1237.

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URL officielle: http://dx.doi.org/doi:10.1007/s00226-012-0479-6

Résumé

Effect of artificial weathering on the wettability of three heat-treated North American wood species (jack pine, aspen, and birch) is studied from the point of view of the structural and chemical changes taking place on the wood surface. Weathering increases wettability of all three heat-treated woods by water. Changes in wettability during artificial weathering differ according to heat treatment procedure and wood species and are likely due to combination of structural and chemical changes of the surfaces. Scanning electron microscopic analysis indicates that cracks form due to degradation taking place during weathering. As a result, water has easier entry into the cell wall, which consequently increases wettability. IR spectra suggest that the OH/CH2 ratio for heat-treated specimens is inversely proportional to the contact angle regardless of the type of wood species. The presence of cellulose-rich layer on wood surface and increasing amount of amorphous cellulose transformed from crystallized cellulose due to weathering result in increase in hydroxyl; consequently, it increases heat-treated wood wettability.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:46
Numéro:6
Pages:p. 1215-1237
Version évaluée par les pairs:Oui
Date:2012
Sujets:Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
Mots-clés:lignin, contact angle, wettability, wood species, wood surface
Déposé le:01 mai 2019 18:30
Dernière modification:01 mai 2019 18:30
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