Effect of heat treatment on color and glossiness properties of zebrano, sapeli and merbau woods

Öz

Heat treatment is one of the methods of wood modification and it is known that it changes the technological properties of wood. In this study, the determination of the colour and glossiness values on the wood species which heat treated according to ThermoWood method (at 212^oC for 1 hour and 2 hours) that is obtained from, zebrano (Microberlinia brazzavillensis), sapelli (Entandrphragma cylindrocum) and merbau (Intsia bijuga) was aimed. The colour and glossiness values were determined on samples prepared from different tree species. Lightness (L*) and yellow colour (b*) tone values were decreased by heat treatment. The glossiness values of the test specimens were also changed by heat treatment application. According to these results; the highest total colour difference value (ΔE*) was determined on merbau samples, the lowest total colour difference value (ΔE*) was determined on sapelli samples. According to obtained data; it can be said that the colour and glossiness values of wood of zebrano, sapelli and merbau was affected by heat treatment. 

Anahtar Kelimeler

• Heat treatment,Color,Glossiness,Sapeli,Zebrano

Zebrano, sapelli ve merbau odunlarının renk ve parlaklık özellikleri üzerine ısıl işlemin etkisi

Öz

Isıl işlem uygulaması odun modifikasyon yöntemlerinden birisidir ve odunun teknolojik özelliklerini değiştirdiği bilinmektedir. Bu çalışmada, zebrano (Microberlinia brazzavillensis), sapelli (Entandrphragma cylindrocum) ve merbau (Intsia bijuga)'dan elde edilen ve ThermoWood yöntemine (212^oC'de 1 saat ve 2 saat) göre ısıl işlem görmüş odun türlerinde renk ve parlaklık değerlerinin belirlenmesi amaçlanmıştır. Farklı ağaç türlerinden elde edilen örneklerin renk ve parlaklık değerleri ölçülmüştür. Işıklılık (L*) ve sarı renk (b*) tonu değerleri ısıl işlem tarafından azalmıştır. Isıl işlem uygulaması ile deney örneklerinin parlaklık değerleri de değişmiştir. En yüksek toplam renk farkı değeri (ΔE*) merbau odununda belirlenirken, en düşük toplam renk farkı değeri (ΔE*) sapelli odununda belirlenmiştir. Elde edilen verilere göre; zebrano, sapelli ve merbau ağaçlarının renk ve parlaklık değerlerinin ısıl işlemden etkilendiği söylenebilir.

Anahtar Kelimeler

• Isıl işlem,Renk,Parlaklık,Sapeli,Zebrano

Kaynakça

1. Ayata, U., Gurleyen, L., and Esteves, B., (2017a), Effect of heat treatment on the surface of selected exotic wood species, Drewno, 60(199), 105-116.
2. Ayata, U., Gurleyen, T., Gurleyen, L., Esteves, B., Sivrikaya, H., and Can, A., (2017b), The determination of some surface properties on lodgepole pine, siberian pine and scots pine woods heat treated with ThermoWood method, International Advanced Researches & Engineering Congress, 16-18 November 2017, Osmaniye/Turkey, 856-862.
3. Bal, B.C., and Ayata, U., (2018a), Effect of heat treatment on nitrogen gas presence on some surface properties of poplar wood, II. International Multidisciplinary Studies Congress (IMSC), 4-5 May, Adana/Turkey, 1073.
4. Bal, B.C., and Ayata, U., (2018b), Effect of heat treatment under different conditions on color and glossiness properties of black pine (Pinus nigra) wood, II. International Multidisciplinary Studies Congress (IMSC), 4-5 May, Adana/Turkey, 1071.
5. Chen, Y., Fan, Y., Gao J., and Stark, N.M., (2012), The effect of heat treatment on the chemical and color change of black locust (Robinia pseudoacacia) wood flour, Bioresources, 7(1), 1157-1170.
6. Dubey, M.K., Pang, S., Walker, J., (2011), Effect of oil heating age on colour and dimensional stability of heat treated Pinus radiate, European Journal of Wood and Wood Products, 69: 255–262.
7. Esteves, B., Marques, A.V., Domingos, I., Pereira, H., (2008), Heat-induced colour changes of pine (Pinus pinaster) and eucalypt (Eucalyptus globulus) wood, Wood Science and Technology, 42(5), 369-384.
8. Gurleyen, T., Ayata, U., Gurleyen, L., and Esteves, B., (2017a), Determination of glossiness and color values on ash, beech, red-bud maple, and red pine wood species heat-treated (ThermoWood method), International Advanced Researches & Engineering Congress, 16-18 November 2017, Osmaniye/Turkey, 752-759.

9. Gurleyen, T., Ayata, U., Gurleyen, L., Esteves, B., Sivrikaya, H., and Can, A., (2017b), The determination of colour and glossiness properties on santos, rose and rowan woods heat treated according to ThermoWood method, 2nd International Conference on Material Science and Technology in Cappadocia (IMSTEC’17), October 11-13, 2017, Nevsehir/Turkey, 401-407.
10. Gurleyen, T., Ayata, U., Gurleyen, L., and Esteves, B., (2017c), Investigation of colour and glossiness on American ash, European alder, white willow and white poplar heat-treated (ThermoWood method) wood species, II. International Igdir Symposium (IGDIRSEMP 2017), October 9-11, Igdır/Turkey, 183.
11. Gurleyen, L., Esteves, B., Ayata, U., Gurleyen, T., and Cinar, H., (2018), The effects of heat treatment on colour and glossiness of some commercial woods in Turkey, Drewno, 61(201).
12. Hidayat, W., Jang, J.H., Park, S.H., Qi, Y., Febrianto, F., Lee, S.H., and Kim, N.H., (2015), Effect of temperature and clamping during heat treatment on physical and mechanical properties of okan (Cylicodiscus gabunensis [Taub.] Harms) wood, Bioresources, 10(4), 6961-6974.
13. Johansson, D., (2005), Strenght and colour response of solid wood to heat treatment, Graduate Thesis, Luleå University of Technology, Department of Skelleftea Campus, Division of Wood Technology, Sweden, 93(5), 1402-1757.
14. Korkut, D.S., Hiziroglu, S., and Aytin, A., (2013), Effect of heat treatment on surface characteristics of wild cherry wood. BioResources, 8(2), 1582-1590.
15. Kučerová, V., Lagaňa, R., Výbohová, E., and Hýrošová, T., (2016), The effect of chemical changes during heat treatment on the color and mechanical properties of Fir wood, BioResources, 11(4), 9079-9094.
16. Mitani, A., and Barboutis, L., (2014), Changes caused by heat treatment in color and dimensional stability of beech (Fagus sylvatica L.) wood, Drvna Industrija, 65(3), 225-232.
17. Pincelli, A.P.S.L.M., De Morua, L.F., and Brito, J.O., (2012), Effect of thermal rectification on colors of Eucalyptus saligna and Pinus caribaea woods, Maderas. Ciencia y tecnologia, 14(2), 239-248.
18. Sahin, S., ve Ayata, U., (2018), Teak, black ebony ve wenge ağaç türlerinde renk ve parlaklık özellikleri üzerine ısıl işlemin (ThermoWood metot) etkisi, Multidisipliner Çalışmalar-3 (Sağlık ve Fen Bilimleri), Gece Kitaplığı Yayınevi, Birinci Basım, Editörler: Rıdvan Karapınar, Murat A. Kuş, Ocak 2018, Ankara, Türkiye, 323-334.
19. Shi, Q., Bao, F.C., Lu, C.X., and Jiang, J.H., (2011), Effect of heat treatment temperature on the colour of okan wood, Advanced Materials Research, 214(1), 531-534.
20. Zhang, J., Kamdem, D.P., Temiz, A., (2009), Weathering of copper-amine treated wood, Applied Surface Science, 256(3), 842-846.
21. Zonuncio, A.J.V., Motta, J.P., Silveria, T.A., Farias, E.D.S., and Trugilho, P.F., (2014), Physical and colorimetric changes in Eucalptus grandis wood after heat treatment, Bioresources, 9(1): 293-302.