| Titre : |
Accelerated weathering performance of Scots pine preimpregnated with copper-based chemicals before varnish coating - Part 1 : coated with cellulosic and polyurethane varnishes |
| Type de document : |
texte imprimé |
| Auteurs : |
Ahmet Gunduz, Auteur ; Ergun Baysal, Auteur ; Turkay Turkoglu, Auteur ; Caglar Altay, Auteur ; Mustafa kucuktuvek, Auteur ; Huseyin Peker, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 34-44 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Brillance (optique)
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Cuivre
Décoloration
Essais accélérés (technologie)
Matériaux -- Imprégnation
Pin sylvestre
Polyuréthanes
Vernis
|
| Index. décimale : |
667.7 Cires, laques, vernis |
| Résumé : |
This study aimed to determine the effect of accelerated weathering on gloss, surface hardness and colour changes of Scots pine (Pinus sylvestris L.). Test samples were impregnated with Adolit KD-5, Wolmanit CX-8 and Celcure AC-500 covered with cellulosic and polyurethane varnishes. The results showed that the values of surface hardness and gloss increased after accelerated weathering. While the surface hardness of Scots pine was increased for impregnated and polyurethane-coated varnish, it decreased for impregnated and cellulosic varnish-coated Scots pine after 1000 hours of accelerated weathering exposure. Copper-based chemical impregnation and varnish coating developed the gloss of Scots pine specimens relative to the surface characteristics observed in single-coated Scots pine specimens. While the most appropriate chemical was Celcure AC-500 for surface hardness, it was Adolit KD-5 for the gloss of Scots pine after 1000 hours of accelerated weathering exposure. Wood specimens impregnated prior to the application of varnish were more effective in stabilising the colour of Scots pine than Scots pine only coated with varnish. Polyurethane varnish-treated Scots pine showed better colour stability for each partial and total accelerated weathering exposure period. The total colour changes were lowest for polyurethane varnish-coated Scots pine impregnated with Celcure AC-500 after 1000 hours of accelerated weathering exposure. |
| Note de contenu : |
- EXPERIMENTAL : Preparation of wood specimens and chemicals - Impregnation procedure - Coating of the wood surfaces - Surface hardness test - Gloss test - Colour test - Accelerated weathering test
- RESULTS AND DISCUSSION : Surface hardness changes - Gloss changes - Colour changes |
| DOI : |
https://doi.org/10.1111/cote.12435 |
| En ligne : |
https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12435 |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33698 |
in COLORATION TECHNOLOGY > Vol. 136, N° 1 (02/2020) . - p. 34-44
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