The impact of ultraviolet radiation on the colour and wettability of wood used for facades

• Autorzy: Laskowska A. , Dobrowolska E. , Boruszewski P.

Identyfikatory

DOI

10.12841/wood.1644-3985.C12.16

• Języki publikacji: EN

Abstrakty

EN

The study examined the effect of UV radiation on the colour and wettability of cedar, gaboon, meranti and Scots pine wood. The tested species of exotic wood are mainly used in European countries for facades. For this kind of usage they act as a substitute for pine wood. In the study, the colour parameters were determined using the CIE L*a*b* colour space model. The tests showed that the most significant changes in the lightness of the wood occurred after 20 hours of UV radiation exposure. After that time, the L* value change was linear. The cedar wood turned the darkest and it also showed the greatest total change of colour ΔE. Comparable colour changes ΔE, and thus the greatest colour stability of all the tested wood species, were shown by the gaboon and meranti. In addition, it should be noted that all the tested wood species were characterized by a much smaller susceptibility to colour change under UV radiation than the pine sapwood and heartwood. The results also revealed that UV radiation significantly affects the contact angle, and therefore the surface free energy of the cedar and pine sapwood.

Słowa kluczowe

EN

cedar; gaboon; meranti; Scots pine; ultraviolet radiation; colour; surface energy

• Wydawca: Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
• Czasopismo: Drewno : prace naukowe, doniesienia, komunikaty
• Rocznik: 2016
• Tom: vol. 59, nr 197
• Strony: 99--111
• Opis fizyczny: Bibliogr. 37 poz., rys., tab.

Twórcy

autor

Laskowska A.

• Warsaw University of Life Sciences – SGGW, Faculty of Wood Technology, Warsaw, Poland

autor

Dobrowolska E.

• Warsaw University of Life Sciences – SGGW, Faculty of Wood Technology, Warsaw, Poland

autor

Boruszewski P.

• Warsaw University of Life Sciences – SGGW, Faculty of Wood Technology, Warsaw, Poland

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• List of standards
• EN 13556:2003. Round and sawn timber – Nomenclature of timbers used in Europe
• ISO 7724-3:2003. Paints and varnishes. Colorimetry. Part 3: Calculation of colour differences
• ISO 13061-1:2014. Physical and mechanical properties of wood – Test methods for small clear wood specimens – Part 1: Determination of moisture content for physical and mechanical tests
• ISO 13061-2:2014. Physical and mechanical properties of wood – Test methods for small clear wood specimens – Part 2: Determination of density for physical and mechanical tests

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.