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Properties and Manufacturing of Low Melting Alloy Impregnated Wood Composites for using Domestic Thinned Logs of Juglans mandshurica

국산 가래나무 간벌재활용을 위한 금속주입목재의 제조 및 특성

  • Park, Kye-Shin (Department of Biobased materials, Chungnam National Univ.) ;
  • Lee, Hwa-Hyoung (Department of Biobased materials, Chungnam National Univ.)
  • 박계신 (충남대학교 환경소재공학과) ;
  • 이화형 (충남대학교 환경소재공학과)
  • Received : 2010.11.07
  • Accepted : 2010.12.13
  • Published : 2010.12.31

Abstract

The low melting alloy impregnated wood composites with natural grain of thinned Juglans mandshurica was made and evaluated in this study. And the proper manufacturing conditions was also investigated in this study. The low melting alloy with bismuth(Bi) and tin(Sn) which are harmless to humans, was applied for this novel composites, which showed not only no defects of discoloration, delamination, swelling, and cracking, because of high dimensional stability and low thickness swelling, but also much improved performance such as high bending strength, high hardness, low abrasion, high thermal conductivity as floor materials. This study also suggested the proper impregnating condition, such as 10 minutes of the preliminary vacuum time, $187^{\circ}C$ of the heating temperature and 10 minutes of the maintaining pressure time at the pressure of 30kgf/$cm^2$. The produced composites showed 9 times higher density for small specimen, 6.6 times for actual size sample and great increase in bending strength from 102.05N/$mm^2$ to 189.47N/$mm^2$ for small size sample and to 205.4N/$mm^2$ for actual size sample, also great increase in hardness from 15.1N/$mm^2$ to 73.38N/$mm^2$ for small size sample and 64.87N/$mm^2$ for actual size sample. And the composites demonstrated great decrease in abrasion depth and in water absorption.

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References

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