Effects of artificial weathering on the surface properties of coated radiata pine
Fuente:
Redalyc
Enregistré dans:
| Auteur principal: | |
|---|---|
| Format: | Artículo científico |
| Langue: | en |
| Publié: |
Universidad del Bío Bío
2023
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1876432223449645056 |
|---|---|
| author | Sirri Sahin |
| author_facet | Sirri Sahin |
| contents | Effects of artificial weathering on the surface properties of coated radiata pine Sirri Sahin Bruno Esteves Ahmet Can Hüseyin Sivrikaya Idalina Domingos José Ferreira Ümit Ayata Agrociencias color glossiness Pinus radiata wood discoloration varnish applications Radiata pine boards were coated with two different methods A and B both beginning with a hydro primer and finishing with a mat oil but method A using an acrylic high gloss coating and method B three layers of an acrylic sealer in between. The samples were subjected to aging processes for 144 h, 288 h, and 432 h by using UV-A 340 nm lamps. The CIE L*a*b* and CIE L*C*H* coordinates were determined (L*, a*, b*, C*, h o*, ΔE*), gloss (perpendicular (⊥) and parallel (//) to the grain at 20°, 60°, and 85° angles) and surface adhesion strength via the pull-off method were tested before and after weathering. Results have shown that lightness (L*), decreases with weathering for both varnish applications with a higher decrease for the B coating system. Redness increased for both applications with no significant differences. At the same time there was a yellowing of the samples along the weathering period. Parallel and perpendicular gloss decreased for 20º and 60º angles while it increased for 85º angle. The adhesion strength of method A was higher and its decrease with weathering was smaller than for method B. Both varnish applications have proven to confer some protection against wood discoloration, but method A showed the best results and is therefore the best method to be used by radiata pine. 2023 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48575202029 https://www.redalyc.org/journal/485/48575202029/ https://www.redalyc.org/journal/485/48575202029/html/ https://www.redalyc.org/journal/485/48575202029/48575202029.epub https://www.redalyc.org/journal/485/48575202029/movil 10.4067/s0718-221x2023000100429 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Vol.25 |
| format | Artículo científico |
| id | redalyc_48575202029 |
| institution | Redalyc |
| language | en |
| publishDate | 2023 |
| publisher | Universidad del Bío Bío |
| spellingShingle | Effects of artificial weathering on the surface properties of coated radiata pine Sirri Sahin Agrociencias color glossiness Pinus radiata wood discoloration varnish applications Effects of artificial weathering on the surface properties of coated radiata pine Sirri Sahin Bruno Esteves Ahmet Can Hüseyin Sivrikaya Idalina Domingos José Ferreira Ümit Ayata Agrociencias color glossiness Pinus radiata wood discoloration varnish applications Radiata pine boards were coated with two different methods A and B both beginning with a hydro primer and finishing with a mat oil but method A using an acrylic high gloss coating and method B three layers of an acrylic sealer in between. The samples were subjected to aging processes for 144 h, 288 h, and 432 h by using UV-A 340 nm lamps. The CIE L*a*b* and CIE L*C*H* coordinates were determined (L*, a*, b*, C*, h o*, ΔE*), gloss (perpendicular (⊥) and parallel (//) to the grain at 20°, 60°, and 85° angles) and surface adhesion strength via the pull-off method were tested before and after weathering. Results have shown that lightness (L*), decreases with weathering for both varnish applications with a higher decrease for the B coating system. Redness increased for both applications with no significant differences. At the same time there was a yellowing of the samples along the weathering period. Parallel and perpendicular gloss decreased for 20º and 60º angles while it increased for 85º angle. The adhesion strength of method A was higher and its decrease with weathering was smaller than for method B. Both varnish applications have proven to confer some protection against wood discoloration, but method A showed the best results and is therefore the best method to be used by radiata pine. 2023 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48575202029 https://www.redalyc.org/journal/485/48575202029/ https://www.redalyc.org/journal/485/48575202029/html/ https://www.redalyc.org/journal/485/48575202029/48575202029.epub https://www.redalyc.org/journal/485/48575202029/movil 10.4067/s0718-221x2023000100429 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Vol.25 |
| title | Effects of artificial weathering on the surface properties of coated radiata pine |
| topic | Agrociencias color glossiness Pinus radiata wood discoloration varnish applications |
| url | https://www.redalyc.org/articulo.oa?id=48575202029 https://www.redalyc.org/journal/485/48575202029/ https://www.redalyc.org/journal/485/48575202029/html/ https://www.redalyc.org/journal/485/48575202029/48575202029.epub https://www.redalyc.org/journal/485/48575202029/movil |