Wettability of keruing (Dipterocarpus spp.) wood after weathering under tropical climate

Author:

Uyup Mohd Khairun Anwar1ORCID,Seng Hua Lee2,Yusoh Alia Syahirah1,Mustapha Asniza1,Surip Siti Norasmah3

Affiliation:

1. Forest Products Division , Forest Research Institute Malaysia , 52109 Kepong , Selangor , Malaysia

2. Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia , 43400 UPM , Serdang , Selangor , Malaysia

3. Faculty of Applied Sciences , Universiti Teknologi MARA (UiTM) , Shah Alam , Selangor , Malaysia

Abstract

Abstract Exposure of unprotected wood to weathering can increase the wettability of the wood and the exposure period should be carefully monitored to preserve surface quality from severe deterioration. This study investigated the wettability of keruing (Dipterocarpus spp.) wood after weathering exposure for 1–4 weeks. The keruing samples were first planed and coated at the edges prior to expose under tropical climate. Contact angle, crack formation and lignin content of the samples were recorded on weekly basis. The results showed that the wettability of weathered keruing wood increased tremendously (i.e., 32%) after 4 weeks of exposure compared to control samples. The increase in wettability can be associated with the increase in crackformation and reduction of lignin content after exposure. It is hereby recommended that keruing wood is not suitable to be exposed to weather for more than 3 weeks before finishing or coating is applied on its surface.

Publisher

Walter de Gruyter GmbH

Subject

General Physics and Astronomy,General Materials Science,General Chemistry

Reference21 articles.

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2. Engku, ABC. Basic and grade stresses for strength groups of Malaysian timbers. In: Malayan forest service trade leaflet no. 38. Kuala Lumpur: The Malaysian Timber Industry Board and Forest Research Institute Malaysia; 1998.

3. MS 544: Part 2:2001. Code of practice for the structural use of timber: permissible stress design of solid timber. Cyberjaya: The Department of Standards Malaysia; 2001.

4. Williams, RS. Weathering of wood. In: Handbook of wood chemistry and wood composites. Madison: CRC Press; 2005, vol 7:139–85 pp.

5. William, RS, Feist, WC. Durability of paint or solid colour stain applied to preweathered wood. For Prod J 1993;43:8–14.

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