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Physical properties of hydrothermally treated rubberwood [Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg.] in different buffered media


Citation

Ali, Md. Rowson and Abdullah, Ummi Hani and Ashaari, Zaidon and Hua, Lee Seng and Hamid, Norul Hisham and Kamarudin, Siti Hasnah (2022) Physical properties of hydrothermally treated rubberwood [Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg.] in different buffered media. Forests, 13 (7). art. no. 1052. pp. 1-14. ISSN 1999-4907

Abstract

The dimensional instability of rubberwood [Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg.] is one of the major drawbacks that limits its utilization. Therefore, treatment is needed to improve these properties. Hydrothermal treatment in different buffered media is one of the techniques that improve its dimensional stability. The physical properties of hydrothermally treated rubberwood in different buffered media (pH 4, 6, 8, 10) and tap water (pH 7.43) with different temperatures (160 °C, 180 °C and 200 °C) were studied. In this study, physical properties such as equilibrium moisture content (EMC), density (ρ), mass loss (ML), water absorption (WA), volumetric swelling coefficient (VSC), thickness swelling (TS) and anti-swelling efficiency (ASE) were investigated for both treated and untreated specimens. Both the buffered media and temperature significantly affected the physical properties. The results indicated that the EMC (%), ρ (kg/m3), ML (%), VSC (%), TS (%) of treated rubberwood samples reduced as the treatment temperature increased. With the exception of WA (%), as WA increased when the treatment temperature increased from 160 °C to 180 °C but started to decrease when the temperature was further increased to 200 °C. The research study also exhibited that hydrothermal treatment using buffered media at different temperatures enhanced the dimensional stability of the treated samples. Alkaline media gave the best results on the physical properties compared to other treatment medias.


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Official URL or Download Paper: https://www.mdpi.com/1999-4907/13/7/1052

Additional Metadata

Item Type: Article
Divisions: Institute of Tropical Forestry and Forest Products
Faculty of Forestry and Environment
DOI Number: https://doi.org/10.3390/f13071052
Publisher: MDPI
Keywords: Hydrothermal treatment; Buffered media; Thermal treatment; Rubberwood; Physical properties; Dimensional stability
Depositing User: Mr. Mohamad Syahrul Nizam Md Ishak
Date Deposited: 22 Jun 2024 14:01
Last Modified: 22 Jun 2024 14:01
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3390/f13071052
URI: http://psasir.upm.edu.my/id/eprint/102764
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