Alteration in colour and fungal resistance of thermally treated oil palm trunk and rubberwood particleboard using palm oil

Aisyah H. A., . and Zaidon A., . and Lee S. H., . and Rasdianah D., . and Lum W. C., . Alteration in colour and fungal resistance of thermally treated oil palm trunk and rubberwood particleboard using palm oil. pp. 83-89. ISSN 1511-2780

Urea formaldehyde-bonded particleboard made from oil palm trunk (OPT) and rubberwood (RW) were soaked in palm oil for 24 hr before thermally treated in oven at 180C 200C and 220C. Colour changes and decay resistance against white rot fungus (Pycnoporus sanguineus) of the samples after thermal treatment were investigated. After thermal treatment Lightness (L) of the samples decreased and the extent of darkening increased along with increasing treatment temperature. Generally RW samples became redder after heat treatment while OPT samples basically showed the same pattern except it became greener when treated at 220C. Yellowing (positive b value) was observed at milder temperature and succeeded by bluing at higher temperature. Improvement in fungal resistance was observed for both OPT and RW samples. The weight loss of the untreated OPT and RW samples were 12.97 1.62 and 30.71 1.75 respectively. At 220C the respective weight loss of OPT and RW samples were 4.58 0.44 and 5.78 1.23. RW showed lower fungal resistance compared to that of the OPT. Strong correlations (R 0.75) were found between weight loss and ”E suggested that fungal resistance increased along with increasing ”E values.

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Abstract

Urea formaldehyde-bonded particleboard made from oil palm trunk (OPT) and rubberwood (RW) were soaked in palm oil for 24 hr before thermally treated in oven at 180C 200C and 220C. Colour changes and decay resistance against white rot fungus (Pycnoporus sanguineus) of the samples after thermal treatment were investigated. After thermal treatment Lightness (L) of the samples decreased and the extent of darkening increased along with increasing treatment temperature. Generally RW samples became redder after heat treatment while OPT samples basically showed the same pattern except it became greener when treated at 220C. Yellowing (positive b value) was observed at milder temperature and succeeded by bluing at higher temperature. Improvement in fungal resistance was observed for both OPT and RW samples. The weight loss of the untreated OPT and RW samples were 12.97 1.62 and 30.71 1.75 respectively. At 220C the respective weight loss of OPT and RW samples were 4.58 0.44 and 5.78 1.23. RW showed lower fungal resistance compared to that of the OPT. Strong correlations (R 0.75) were found between weight loss and ”E suggested that fungal resistance increased along with increasing ”E values.

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Item Type:	Article
AGROVOC Term:	Particle boards
AGROVOC Term:	Oil palm
AGROVOC Term:	Tree trunks
AGROVOC Term:	Hevea rubber
AGROVOC Term:	Soaking
AGROVOC Term:	Palm oils
AGROVOC Term:	Heat treatment
AGROVOC Term:	Microbiological analysis
AGROVOC Term:	Physical properties
AGROVOC Term:	Colour
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/8957

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