Natural weathering of spruce wood chemically modified by re-used e-caprolactone solution / Merve Cambazoglu in COLORATION TECHNOLOGY, Vol. 139, N° 3 (06/2023)  

[article]  inCOLORATION TECHNOLOGY > Vol. 139, N° 3 (06/2023) . - p. 265-275 Titre : Natural weathering of spruce wood chemically modified by re-used e-caprolactone solution Type de document : texte imprimé Auteurs : Merve Cambazoglu, Auteur ; Eylem Dizman Tomak, Auteur ; Mahmut A. Ermeydan, Auteur Année de publication : 2023 Article en page(s) : p. 265-275 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse morphologique Bois -- Conservation Colorimétrie Epicéas et constituants Hydrophobie Poly-e-caprolactone Rugosité Index. décimale : 674.1 Texture, propriétés, types de bois de Résumé : Increasing environmental pressures over the last few years have led to attention for non-biocide treatments in the wood protection field. The ε-caprolactone modification of wood by substitution or blocking of hydroxyl groups with hydrophobic poly(ε-caprolactone) (PCL) is one of the novel modification methods developed in recent years. In this study, ring-opening polymerisation of ε-caprolactone in wood cell walls was evaluated by the third and sixth re-use of recovered monomer and by oven-curing method. Spruce samples were modified by re-used ε-caprolactone and exposed to the natural weathering agents for 12 months. After weathering, the colour change, surface roughness measurements, and macroscopic and ultra-microscopic observations revealed that the modified wood had better surface properties than reference wood. Fourier-transform infrared (FTIR) analysis proved that PCL could be found on the weathered surface up to the sixth month, but very little amount was detected on the surfaces with a longer weathering period. The results clearly showed that the efficiency of PCL modification with re-use of the monomer solution was sufficient during the initial weathering periods, but efficiency was reduced after a prolonged exposure period. Note de contenu : - MATERIALS AND METHODS : Materials - Poly(ε-caprolactone) (PCL) modification - Natural weathering - Colour and surface roughness measurement - Fourier-transform infrared (FTIR) analysis - Morphological analysis by scanning electron microscopy (SEM) - RESULTS AND DISCUSSION : Weight percentage gain (WPG) and volume change (VC) of the samples - Colour changes after the natural weathering test - Surface chemistry analysis after the natural weathering test - Surface roughness changes after the natural weathering test - Table 1 : Weight percentage gain (WPG) and volume change (VC) of samples after the modification process - Table 2 : Intensity ratio of cellulose (899 cm−1) and lignin (1508 cm−1) related bands during weathering DOI : https://doi.org/10.1111/cote.12645 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12645 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39537 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
24086	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Surface properties of impregnated and varnished Scots pine wood after accelerated weathering / Ergun Baysal in COLORATION TECHNOLOGY, Vol. 130, N° 2 (04/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 2 (04/2014) . - p. 140-146 Titre : Surface properties of impregnated and varnished Scots pine wood after accelerated weathering Type de document : texte imprimé Auteurs : Ergun Baysal, Auteur ; Eylem Dizman Tomak, Auteur ; Musa Ozbey, Auteur ; Ebedin Altin, Auteur Année de publication : 2014 Article en page(s) : p. 140-146 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Conservation Bois -- Effets du climat Bois -- Revêtements protecteurs Brillance (optique) Colorimétrie Dureté (matériaux) Essais accélérés (technologie) Pins et constituants Polyuréthanes Surfaces -- Analyse Vernis Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, the effect of accelerated weathering on the surface properties of Scots pine specimens impregnated with wolmanit-CB, tanalith-E, and adolit-KD5 and coated with synthetic and polyurethane varnishes was investigated by measuring surface hardness, glossiness, and colour. Results showed that weathering caused an increase in the hardness of impregnated and varnished specimens, while it caused a decrease in the glossiness of specimens. Surfaces became rougher and darker after weathering in comparison with the initial surfaces of wood specimens. Positive values of the chromatic coordinates indicated that the wood surfaces changed from their original colour to a reddish and yellowish colour. The highest colour change was detected in the specimens coated with polyurethane varnish alone. Both copper-based wood preservative treatment and varnish coating improved the surface properties of specimens in comparison with the surface properties observed on specimens coated with varnish alone. Note de contenu : - EXPERIMENTAL : Preparation of test specimens and wood preservative - Impregnation with wood preservatives - Coating of the wood surfaced - Accelerated weathering test - Surface hardness measurements - Glossiness measurements - Colour measurements - Statistical test - RESULTS AND DISCUSSION : Surface hardness - Glossiness - Colour changes DOI : 10.1111/cote.12070 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12070 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20870 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
16129	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)