Vol.9, No.3, 2021, pp.557-568, doi:10.32604/jrm.2021.013269
OPEN ACCESS
ARTICLE
Bonding Mechanism of Bamboo Particleboards Made by Laccase Treatment
  • Jin Wang1, Weigang Zhang2,*, Xiaowei Zhuang1,*
1 Zhejiang Provincial Key Lab of Biological and Chemical Utilizing of Forest Resources, Zhejiang Forestry Academy, Hangzhou, 310023, China 2 School of Engineering, Zhejiang Agricultural and Forestry University, Hangzhou, 311300, China
* Corresponding Authors: Weigang Zhang. Email: ; Xiaowei Zhuang. Email:
(This article belongs to this Special Issue: Research and Innovations in Engineered Timber and Mass Timber Products for Sustainable Built-Environment)
Received 31 July 2020; Accepted 15 October 2020; Issue published 14 January 2021
Abstract
Using 1–8 years bamboo as materials, the content of different chemical constituent was tested, and the reactive oxygen species (ROS) free radicals produced from laccase treated bamboo were detected by electron spin-resonance (ESR) spectroscope. The wet-process particleboard was made from laccase-treated bamboo by hot pressing and board mechanical properties including internal bond strength (IB), modulus of rupture (MOR) and thickness swelling (TS) after 2-hours water absorption were tested under different conditions. Results showed that laccase mainly catalyze the bamboo components and improved the bonding strength of laccase-treated boards. By ESR measurement on each single component such as milled bamboo lignin, xylan and pore cotton treated with laccase, it was proved that laccase helped the degradation of bamboo lignin to produce ROS free radicals and could not catalyze the oxidation of cellulose and hemicelluloses. A logarithmic function relationship was found between board mechanical properties and ROS free radical level. It is optimal to using 5-year-old bamboo for high efficient utilization. The laccase treatment improves the activity of bamboo particles participating in self-adhesion reaction.
Keywords
Bamboo particleboard; laccase; mechanical properties; ROS; ESR
Cite This Article
Wang, J., Zhang, W., Zhuang, X. (2021). Bonding Mechanism of Bamboo Particleboards Made by Laccase Treatment. Journal of Renewable Materials, 9(3), 557–568.
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