Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Reduction of Formaldehyde Emission from Particleboardsby Bio-Scavengers

  • Eom, Young-Geun (Department of Forest Products, College of Forest Science, Koomin National University) ;
  • Kim, Jong-Sung (Department of Forest Products, College of Forest Science, Koomin National University) ;
  • Kim, Sumin (Lap. of Adhesion & Bio-Composites, Major in Environmental Material Science, Seoul National University) ;
  • Kim, Jin-A (Lap. of Adhesion & Bio-Composites, Major in Environmental Material Science, Seoul National University) ;
  • Kim, Hyun-Joong (Lap. of Adhesion & Bio-Composites, Major in Environmental Material Science, Seoul National University)
  • Received : 2006.01.09
  • Accepted : 2006.05.21
  • Published : 2006.09.25
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Abstract

This study was to investigate the effect of adding additive as tannin, rice husk and charcoal, for reducing the formaldehyde emission level, on the adhesion properties of urea-formaldehyde (UF) resin for particleboard. We controlled the hot-pressing time, temperature and pressure to determine the bonding strength and formaldehyde emission. Blends of various UF resin/additives (tannin, rice husk and charcoal) compositions were prepared. To determine and compare the effect of additives (tannin, rice husk and charcoal) content, 0, 5, 10 and 15%, by weight of UF resin, were used. $NH_4Cl$ as hardener added. To determine the level of formaldehyde emission, we used the desiccator, perforator and 20 L-small chamber method. The formaldehyde emission level decreased with increased additions of additive (except rice husk). Also, increased hot-pressing time decreased formaldehyde emission level. At a charcoal replacement ratio of only 15%, the formaldehyde emission level is under F ✩ ✩ ✩ ✩ grade (emit < $0.3mg/{\ell}$). Curing of the high tannin additive content in this adhesive system indicated that the bonding strength increased. But, in the case of rice husk and charcoal, the bonding strength was much lower due to the inorganic substance. Furthermore, rice husk was poor in bonding strength as well as formaldehyde emission than tannin and charcoal.

Keywords

Acknowledgement

Supported by : Kookmin University

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