Investigation of color and roughness properties of heat-treated pine wood after accelerating weathering

Abstract

In this study, the accelerated weathering test performance of Scots pine (Pinus sylvestris L.) wood was investigated by heat treatment under oxygen (open system) and vacuum (closed system). Samples were prepared from the pine sapwood part with dimensions of 75 mm × 15 mm × 150 mm (radial x tangential x longitudinal). After the accelerated weathering test, the surface roughness and color measurements of the samples were carried out. According to the results obtained, the minimum color change was obtained after heat treatment at 190 °C in a closed system (VHT). The surface roughness parameters of pine samples that were heat-treated in the closed system increased with the increase in the heat treatment temperature. In the heat treatment performed in the closed system, lower roughness values were obtained compared to the heat treatment performed in the open system (HT). In parallel with the increase in the accelerated weathering time, the total color change and roughness values increased.

Keywords

• Heat treatment
• weathering
• color
• roughness

Isıl işlem uygulanmış çam odun örneklerinin hızlandırılmış yaşlandırma testi sonrası renk ve pürüzlülük değerlerinin incelenmesi

Abstract

Bu çalışmada, sarıçam (Pinus sylvestris L.) odununun oksijen (açık sistem) ve vakum altında (kapalı sistem) ısıl işlemi sonrası hızlandırılmış yaşlandırma testi performansı incelenmiştir. Örnekler 75 (Radyal) × 15 (Teğet) × 150 (Lifler) mm boyutlarında çam diri odun kısmından hazırlanmıştır. Hızlandırılmış yaşlandırma testi sonrası örneklerin yüzey pürüzlülüğü ve renk ölçümü gerçekleştirilmiştir. Sonuçlara göre minimum renk değişimi 190 °C’de kapalı sistemde (VHT) gerçekleştirilen ısıl işlem sonrası elde edilmiştir. Kapalı sistemde ısıl işlem görmüş sarıçam örneklerinin yüzey pürüzlülük parametreleri ısıl işlem sıcaklığındaki artışla birlikte artmıştır. Kapalı sistemde gerçekleştirilen ısıl işlemde, açık sistemde (HT) gerçekleştirilen ısıl işleme kıyasla daha düşük pürüzlülük değerleri elde edilmiştir. Hızlandırılmış yaşlandırma süresinin artışına paralel olarak toplam renk değişimi ve pürüzlülük değerleri artış göstermiştir.

Keywords

• Isıl işlem
• yaşlandırma
• renk
• pürüzlülük

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