Possibility of improving the properties of Mahang Wood (Macaranga sp.)through phenolic compreg technique

A.F., Ang and Zaidon, A. and Bakar, E.S. and Mohd Hamami, S. and Anwar, U.M.K. and Jawaid, M. (2014) Possibility of improving the properties of Mahang Wood (Macaranga sp.)through phenolic compreg technique. Sains Malaysiana, 43 (2). pp. 219-225. ISSN 0126-6039


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Lesser known wood species (LKS) have the potentials to become alternative sources of timber supply for wood based industries if their properties can be improved. In this study, Mahang wood (Macaranga sp.) was impregnated 15% (w/v) low molecular weight phenol formaldehyde (LMWPF) followed by compressing in a hot press at 70, 60 and 50% compression ratios (CR). The treated wood was partially dried in an oven at 65°C until 10% moisture content and subsequently followed by curing at 150°C for 30 min in a hot press. The results showed that the phenolic compreg technique had successfully increased the dimensional stability and mechanical properties of the wood. The polymer retention calculated based on weight gain regardless of compression ratio was approximately 30%. The majority of the properties were improved by the degree of compression in a hot press. Nevertheless, thickness swelling and swelling coefficient increased which were due to spring back effect. As regards to specific strength (strength to density ratio), the compreg wood displayed lower strength and stiffness in lateral direction compared with untreated solid wood. However, the specific compressive strength perpendicular to grain and hardness of the compreg wood were superior than untreated solid wood. The treatment had also changed the wood into highly resistant to fungal decay.

Item Type:Article
Keywords:Compression ratio; Mahang wood; phenol formaldehyde; Pycnoporus sanguineus; swelling coefficient
Journal:Sains Malaysiana
ID Code:6850
Deposited By: ms aida -
Deposited On:11 Feb 2014 04:06
Last Modified:14 Dec 2016 06:42

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