Fabricating Eco-friendly Binderless Fiberboard from Laccase-treated Rubber Wood Fiber

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Mohammad, Nasir and Gupta, Arun and Beg, M. D. H. and Chua, Gek Kee and Jawaid, Mohammad and Kumar, Anuj and Ahmed Khan, Tanveer (2013) Fabricating Eco-friendly Binderless Fiberboard from Laccase-treated Rubber Wood Fiber. BioResources, 8 (3). pp. 3599-3608. ISSN 1930-2126 (print); 1930-2126 (online)

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Official URL: http://ojs.cnr.ncsu.edu/index.php/BioRes/article/v...

Abstract

The emission of formaldehyde vapors from adhesives such as urea formaldehyde (UF) and phenol formaldehyde (PF) is a main concern for the wood composite industry. The ability of laccase enzymes to modify the fiber in pulp industries has given hope to the wood composite industry to prepare composites without using external adhesives. In the present work, rubber wood fiber was treated with different amounts of laccase enzymes at varying time intervals. Although laccase is known to cause changes to lignin, FTIR analysis of treated fiber revealed no significant difference in the chemical composition of cellulosic fiber as compared to the untreated fiber. SEM analysis exhibited a thin uniform layer of lignin deposition on the fiber surface that may be precipitated back when the reaction reaches equilibrium. XRD showed a 10% increase (maximum) in the crystallinity index of treated fibers as compared to untreated fiber. The treated fibers were dried and pressed at different platen temperatures for various time intervals without any adhesive. Mechanical properties such as MOE, MOR, and IB were done to analyze the performance of binderless fiberboard as per ASTM D1037. Binderless fiberboard of density 750 (±10) MPa that was fabricated from the fiber treated at 6 U/g enzyme for 60 min and pressed at 200 °C for 6 min showed good performance.

Item Type:Article
Uncontrolled Keywords:Modulus of rupture (MOR); Modulus of elasticity (MOE); Internal bonding (IB); Crystallinity index (CrI); X-ray diffraction (XRD); Scanning electron microscope (SEM)
Subjects:Q Science > Q Science (General)
T Technology > TP Chemical technology
Divisions:Faculty of Chemical & Natural Resources Engineering
ID Code:11964
Deposited By: Dr. Chua@Yeo Gek Kee
Deposited On:22 Feb 2016 16:25
Last Modified:25 Oct 2017 12:08

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