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Physical and Mechanical Properties of Mediumdensity Fibreboards Using Soy-Lignin Adhesives

M., Nasir and Gupta, Arun and Beg, M. D. H. and Chua, Gek Kee and A., Kumar (2014) Physical and Mechanical Properties of Mediumdensity Fibreboards Using Soy-Lignin Adhesives. Journal of Tropical Forest Science, 26 (1). pp. 41-49.

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Emission of formaldehyde from wood-based composites is a serious concern for research. In this study, nine different combinations of soy�lignin-based adhesives were prepared by varying their pH and soy content. Lignin was extracted from rubberwood fibres by an enzymatic treatment. Physical and chemical properties of the soy�lignin adhesives were investigated. Solid content in soy�lignin adhesive was calculated by oven-dry method and viscosity was studied using a digital viscometer. Fourier transform infrared spectroscopy was performed to study the structural changes in treated lignin and modified soy�lignin adhesives. Medium-density fibreboard (MDF) was prepared using the nine different soy�lignin adhesives and its bending and internal bonding properties were tested. It was observed that wood composites prepared by alkali-treated soy�lignin adhesives had improved properties. Scanning electron microscope was used to study the surface morphology of MDF. All samples were tested according to ASTM D1037-06a standards. The boards prepared using alkali soy�lignin adhesives passed internal bonding and modulus of rupture tests.

Item Type: Article
Uncontrolled Keywords: Formaldehyde, laccase, enzyme hydrolysis lignin (EHL), Fourier transform infrared (FTIR)
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 09 Jan 2015 07:44
Last Modified: 20 Dec 2018 03:47
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