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Incorporation of a Preservative in Particleboard: Properties and Durability

0.5% and 1.0% (w/w) of boric acid (H3BO3) were incorporated in rubberwood (Hevea brasiliensis) particleboards either by initially mixing the boric acid powder with urea formaldehyde adhesive or spraying boric acid solution onto the furnish during blending. Two types of urea formaldehyde, i.e. E1-g...

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Main Authors: Ashaari, Zaidon, Hamid, Rayehan, Md. Tahir, Paridah, Mohd Yunus, Nor Yuziah
Format: Article
Language:English
English
Published: Universiti Putra Malaysia Press 1998
Online Access:http://psasir.upm.edu.my/id/eprint/3671/1/Incorporation_of_a_Preservative_in_Particleboard.pdf
http://psasir.upm.edu.my/id/eprint/3671/
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spelling my.upm.eprints.36712013-05-27T07:10:19Z http://psasir.upm.edu.my/id/eprint/3671/ Incorporation of a Preservative in Particleboard: Properties and Durability Ashaari, Zaidon Hamid, Rayehan Md. Tahir, Paridah Mohd Yunus, Nor Yuziah 0.5% and 1.0% (w/w) of boric acid (H3BO3) were incorporated in rubberwood (Hevea brasiliensis) particleboards either by initially mixing the boric acid powder with urea formaldehyde adhesive or spraying boric acid solution onto the furnish during blending. Two types of urea formaldehyde, i.e. E1-glue (maximum permissible formaldehyde emmision < 0.1 ppm) and E2-glue (maximum permissible formaldehyde emmision 0.1-1.0 ppm) were used as the bonding agent. The targeted density of the boards was 650 kg/m3 . The board properties and durability against white rot fungus were evaluated in accordance with JIS A 5908-1983 and ASTM D2017-71, respectively. The chemical loading in the board was in the range of 0.42-0.47% and 0.64-0.70%, respectively when 0.5% and 1.0% of boric acid (based on the dry-weight of the particles) were incorporated in the boards. The dry modulus of rupture (MaR), dry modulus of elasticity (MOE) of the boric acid-treated boards were significantly reduced. The reduction of the properties increased as the chemical loading in the treated boards increases. However, wet MOR and wet MOE, internal bonds (IB) and thickness swelling (TS) of treated boards at both concentration levels did not differ significantly compared to the untreated boards. Particleboards bonded with E2-glue were more resistant to white rot Jungus (Pycnoporous sanguineus) than those bonded with El-glue. The presence of boric acid significantly increased the durability of board against white rot Fungus, and the resistance towards the Fungus increased as the boric acid loading increases. Universiti Putra Malaysia Press 1998 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/3671/1/Incorporation_of_a_Preservative_in_Particleboard.pdf Ashaari, Zaidon and Hamid, Rayehan and Md. Tahir, Paridah and Mohd Yunus, Nor Yuziah (1998) Incorporation of a Preservative in Particleboard: Properties and Durability. Pertanika Journal of Tropical Agricultural Science, 21 (2). pp. 83-92. ISSN 1511-3701 English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description 0.5% and 1.0% (w/w) of boric acid (H3BO3) were incorporated in rubberwood (Hevea brasiliensis) particleboards either by initially mixing the boric acid powder with urea formaldehyde adhesive or spraying boric acid solution onto the furnish during blending. Two types of urea formaldehyde, i.e. E1-glue (maximum permissible formaldehyde emmision < 0.1 ppm) and E2-glue (maximum permissible formaldehyde emmision 0.1-1.0 ppm) were used as the bonding agent. The targeted density of the boards was 650 kg/m3 . The board properties and durability against white rot fungus were evaluated in accordance with JIS A 5908-1983 and ASTM D2017-71, respectively. The chemical loading in the board was in the range of 0.42-0.47% and 0.64-0.70%, respectively when 0.5% and 1.0% of boric acid (based on the dry-weight of the particles) were incorporated in the boards. The dry modulus of rupture (MaR), dry modulus of elasticity (MOE) of the boric acid-treated boards were significantly reduced. The reduction of the properties increased as the chemical loading in the treated boards increases. However, wet MOR and wet MOE, internal bonds (IB) and thickness swelling (TS) of treated boards at both concentration levels did not differ significantly compared to the untreated boards. Particleboards bonded with E2-glue were more resistant to white rot Jungus (Pycnoporous sanguineus) than those bonded with El-glue. The presence of boric acid significantly increased the durability of board against white rot Fungus, and the resistance towards the Fungus increased as the boric acid loading increases.
format Article
author Ashaari, Zaidon
Hamid, Rayehan
Md. Tahir, Paridah
Mohd Yunus, Nor Yuziah
spellingShingle Ashaari, Zaidon
Hamid, Rayehan
Md. Tahir, Paridah
Mohd Yunus, Nor Yuziah
Incorporation of a Preservative in Particleboard: Properties and Durability
author_facet Ashaari, Zaidon
Hamid, Rayehan
Md. Tahir, Paridah
Mohd Yunus, Nor Yuziah
author_sort Ashaari, Zaidon
title Incorporation of a Preservative in Particleboard: Properties and Durability
title_short Incorporation of a Preservative in Particleboard: Properties and Durability
title_full Incorporation of a Preservative in Particleboard: Properties and Durability
title_fullStr Incorporation of a Preservative in Particleboard: Properties and Durability
title_full_unstemmed Incorporation of a Preservative in Particleboard: Properties and Durability
title_sort incorporation of a preservative in particleboard: properties and durability
publisher Universiti Putra Malaysia Press
publishDate 1998
url http://psasir.upm.edu.my/id/eprint/3671/1/Incorporation_of_a_Preservative_in_Particleboard.pdf
http://psasir.upm.edu.my/id/eprint/3671/
_version_ 1643822678696525824
score 13.211869

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