Relationship between Wood Colour of Seven Tropical Hardwood Species and Formaldehyde Emission of Plywood
Syafinaz Abd Rashad1, Paridah Md Tahir2, Rafeadah Rusli3, Lee Seng Hua4
1Syafinaz Abd Rashad, Institute of Tropical Forestry and Forest Products, Universiti Putra Malaysia, UPM Serdang, Selangor, Malaysia.
2Paridah Md Tahir, Institute of Tropical Forestry and Forest Products, Universiti Putra Malaysia, UPM Serdang, Selangor, Malaysia.
3Rafeadah Rusli, Forest Research Institute Malaysia, Jalan Frim, Kepong, Kuala Lumpur, Selangor, Malaysia.
4Lee Seng Hua, Institute of Tropical Forestry and Forest Products, Universiti Putra Malaysia, UPM Serdang, Selangor, Malaysia.
Manuscript received on 05 July 2019 | Revised Manuscript received on 15 August 2019 | Manuscript Published on 27 August 2019 | PP: 520-523 | Volume-8 Issue-2S4 July 2019 | Retrieval Number: B11020782S419/2019©BEIESP | DOI: 10.35940/ijrte.B1102.0782S419
Open Access | Editorial and Publishing Policies | Cite | Mendeley | Indexing and Abstracting
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: There are many factors that affect the formaldehyde emission from plywood such as wood species and moisture content. As for wood species, colour appearance was found to affect significantly the formaldehyde emission. Therefore, the effects of tropical wood species with different colour on the formaldehyde emission of manufactured plywood were studied and determined by the perforator and desiccator method. Veneer of seven wood species, namely Mempisang, Kedondong, Penarahan, Keledang, Rengas, Melembu and Ludai were chosen as samples. 3-ply plywood were manufactured using urea formaldehyde as binders. The formaldehyde emission of the produced plywood was tested using perforator method (EN 120) and desiccator method (MS 1787: Part 15). Colour of the wood veneers were measured using Brightness & Colour Meter through CIE L*a*b* system. Relationship between the wood colour and formaldehyde emission were determined. The results revealed that the formaldehyde emission increased as the lightness (L*) of the wood samples increased. This may be due to higher extractive content in darker coloured wood (low lightness) that acts as formaldehyde scavenger.
Keywords: Tropical Hardwood, Colour, Formaldehyde, Relationship, Extractives.
Scope of the Article: Social Sciences