Fabricating eco-friendly binderless fiberboard from laccase-treated rubber wood fiber

Mohammed Nasir, Arun Gupta, M. D.H. Beg, Gek Kee Chua, Mohammad Jawaid, Anuj Kumar, Tanveer Ahmed Khan

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)3599-3608
Number of pages10
JournalBioResources
Volume8
Issue number3
DOIs
Publication statusPublished - Aug 2013
Externally publishedYes

Keywords

  • Crystallinity index (CrI)
  • Internal bonding (IB)
  • Modulus of elasticity (MOE)
  • Modulus of rupture (MOR)
  • Scanning electron microscope (SEM)
  • X-ray diffraction (XRD)

ASJC Scopus subject areas

  • Environmental Engineering
  • Bioengineering
  • Waste Management and Disposal

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