Investigation of some surface properties of heat treated coconut wood

Year 2022, , 8 - 16, 30.06.2022

Ümit Ayata

https://doi.org/10.33725/mamad.1116999

Cited By: 4

Abstract

In this study, some surface properties [color (∆L*, ∆b*, ∆a*, L*, b*, a*, ∆C*, ∆E*, C* and h^o), glossiness (parallel (║) and perpendicular (⊥) to fibers at 20^o, 60^o and 85^o) and shore D hardness] that occur after heat treatment applied to coconut (Cocos nucifera L.) wood at 200^oC for 3 hours were investigated. In addition, the changes in the surfaces that occurred after the application of different numbered abrasives were also determined in the samples without heat treatment. According to the results of the research, it was determined that the shore D hardness value, gloss values parallel and perpendicular to the fibers at 20^o, 60^o and 85^o, L*, a*, b*, C* parameters decreased and the ho angle increased after the heat treatment. In addition; obtained as ∆H*: 13.87, ∆L*: -14.21, ∆b*: 18.40, ∆a*: -7.93, ∆C*: -14.45, and ∆E*: 24.57. In the surface roughness results, the Ra parameter values were found to be 8.498 µm, 7.429 µm, 6.600 µm, 5.332 µm, 4.188 µm, and 3.452 µm for the abrasives numbered 80, 100, 120, 150, 180 and 220, respectively. It was determined that the roughness parameters decreased with the increase of the sanding number.

Keywords

Cocos nucifera L., colour, glossiness, heat treatment, shore D hardness

Isıl işlem görmüş Hindistan cevizi odununda bazı yüzey özelliklerinin incelenmesi

Abstract

Bu çalışmada, Hindistan cevizi (Cocos nucifera L.) ahşabına uygulanmış olan 200^oC’de 3 saat süre ile yapılan ısıl işlem sonrasında meydana gelen bazı yüzey özellikleri [renk (∆L*, ∆b*, ∆a*, L*, b*, a*, ∆C*, ∆E*, C* ve h^o), parlaklık (20^o, 60^o ve 85^o’de liflere paralel (║) ve dik (⊥)) ve shore D sertlik] araştırılmıştır. Buna ek olarak, ısıl işlemsiz örneklerde de farklı numaralı zımparaların uygulanması sonrasında meydana gelen yüzeylerdeki değişiklikler de belirlenmiştir. Araştırma sonuçlarına göre, ısıl işlem sonrasında shore D sertlik değerinin, 20^o, 60^o ve 85^o’de liflere paralel ve dik parlaklık değerlerinin ile L*, a*, b*, C* parametrelerinin azaldığı ve ho açısının ise arttığı belirlenmiş, buna ek olarak; ∆H*: 13.87, ∆L*: -14.21, ∆b*: 18.40, ∆a*: -7.93, ∆C*: -14.45 ve ∆E*: 24.57 olarak elde edilmiştir. Yüzey pürüzlülüğü sonuçlarında ise Ra parametre değerleri 80, 100, 120, 150, 180 ve 220 numaralı zımparalarda sırası ile 8.498 µm, 7.429 µm, 6.600 µm, 5.332 µm, 4.188 µm ve 3.452 µm olarak bulunmuştur. Zımpara numarasının artması ile pürüzlülük parametrelerinin azaldığı tespit edilmiştir. 

Keywords

Hindistan cevizi, Cocos nucifera L., parlaklık, ısıl işlem, renk, shore D sertlik

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