Journal of agriculture & life science (농업생명과학연구)

Institute of Agriculture & Life Science, Gyeongsang National University (경상대학교 농업생명과학연구원)
권호 표지

Effect of the Kind and Content of Raw Materials on Dynamic Modulus of Elasticity of Hybrid Composite Boards Composed of Green Tea, Charcoals and Wood Fiber

녹차-숯-목재섬유 복합보드의 동적탄성률에 미치는 구성원료의 종류 및 배합비율의 영향

  • Park, Han-Min (Div. of Environmental Forest science(Insti. of Agric. and Life Sci.), Gyeongsang National Univ.) ;
  • Heo, Hwang-Sun (Div. of Environmental Forest science(Insti. of Agric. and Life Sci.), Gyeongsang National Univ.) ;
  • Sung, Eun-Jong (Div. of Environmental Forest science(Insti. of Agric. and Life Sci.), Gyeongsang National Univ.) ;
  • Nam, Kyeong-Hwan (Div. of Environmental Forest science(Insti. of Agric. and Life Sci.), Gyeongsang National Univ.) ;
  • Lim, Jae-Seop (Div. of Environmental Forest science(Insti. of Agric. and Life Sci.), Gyeongsang National Univ.) ;
  • Byeon, Hee-Seop (Div. of Environmental Forest science(Insti. of Agric. and Life Sci.), Gyeongsang National Univ.)
  • 박한민 (경상대학교 환경산림과학부(농업생명과학연구원)) ;
  • 허황선 (경상대학교 환경산림과학부(농업생명과학연구원)) ;
  • 성은종 (경상대학교 환경산림과학부(농업생명과학연구원)) ;
  • 남경한 (경상대학교 환경산림과학부(농업생명과학연구원)) ;
  • 임재섭 (경상대학교 환경산림과학부(농업생명과학연구원)) ;
  • 변희섭 (경상대학교 환경산림과학부(농업생명과학연구원))
  • Received : 2012.10.24
  • Accepted : 2012.12.26
  • Published : 2012.12.31
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Abstract

In this study, eco-friendly hybrid composite boards were manufactured from green tea, 3 kinds of charcoals and wood fiber for developing interior materials to reinforce the strength performances and the functionalities in addition to performances of the hybrid composite boards composed of green tea and wood fiber. The effects for the kind and the component ratio of raw materials on dynamic MOE (modulus of elasticity) were investigated, and static bending strength performances were nondestructively estimated. Dynamic MOEs were highest in the hybrid composite boards composed of green tea, fine charcoal and wood fiber on the whole. However, the difference caused by the kind of charcoals was small. These values decreased with increasing component ratios of green tea and charcoals. The hybrid composite boards using $E_1$ grade urea resin had the higher values than those using $E_0$ grade urea resin, however the difference between them markedly decreased than that of hybrid composite board composed of green tea and wood fiber, and it was found that these values were markedly improved than those of the hybrid composite boards composed of green tea and wood fiber. There were mostly high correlations with significance at 1% level between dynamic MOEs and static bending strength performances, and this means that the static bending strength performances can be estimated from dynamic MOE.

이 연구에서는 녹차-목재섬유 복합보드에 강도성능과 기능성을 보강한 건축내장재를 개발하기 위하여 목재섬유에 녹차와 3종류의 숯을 혼합한 녹차-숯-목재섬유 복합보드를 제작하였고, 구성원료의 종류 및 그 배합비율이 복합보드의 동적탄성률에 미치는 영향을 조사하였다. 또한, 동적탄성률을 이용하여 비파괴적으로 정적 휨강도성능을 예측하였다. 녹차-숯-목재섬유 복합보드의 동적탄성률은 백탄함유 복합보드에서 전체적으로 약간 우수하였으나, 숯의 종류에 따른 차이는 크지 않았다. 녹차와 숯의 배합비율이 증가할수록 복합보드의 동적탄성률의 감소하였다. $E_1$급 요소수지를 사용한 복합보드가 $E_0$급 요소수지를 사용한 그것보다 높은 동적탄성률을 나타내었으나, 양수지간의 차이는 녹차-목재섬유 복합보드에 비해 현저히 적었고, 녹차-목재섬유 복합보드보다 현저한 동적탄성률의 향상을 나타내는 것이 확인되었다. 복합보드의 동적탄성률과 정적 휨 강도성능사이에 대부분 1%의 신뢰수준의 상관관계가 확인되어, 동적탄성률로부터 정적 휨 강도성능이 예측이 가능하였다.

Keywords

Acknowledgement

Supported by : (재) 하동녹차연구소

References

  1. Korean Industrial Standard KS F 3200. 2006. Fiber board.
  2. Fishitani, M. 1985. Experimental book of Wood Science. Japan wood research society. pp.202-204.
  3. Ahn, B. J., T. S. Jo, S. S. Lee, K. H. Paik, and S. K. Kim. 2009. Utilization of charcoal as an environmentally friendly building materials (I) -Characterization of building materials prepared with charcoal-. Mokchae Konghak 37: 537-545.
  4. Ayarkwa, J., Y. Hirashima, and Y. Sasaki. 2001. Predicting modulus of rupture of solid and finger-jointed tropical African hardwoods using longitudinal vibration. Forest Prod. J. 51: 85-92.
  5. Byeon, H. S., H. M. Park, C. H. Kim, and F. Lam. 2005. Nondestructive evaluation of strength performance for finger-jointed woods using flexural vibration techniques. Forest Prod. J. 55: 37-42.
  6. Han, T. H., R. H. Shin, and J. H. Kwon. 2005. Physical properties of composite panel manufactured from wood particle and recycled polypropylene. Mokchae Konghak 33: 46-54.
  7. Jun, Y. 1985. Effects of hemp bast fiber on hardboard properties. Mokchae Konghak 13: 36-39.
  8. Kang, C. W., H. J. Park, and S. S. Jeon. 2012. Sound absorption capability and bending strength of miscanthus particle based board. Mokchae Konghak 40: 38-43.
  9. Kataoka, A. and T. Ono 1975. The relations of experimental factors to the vibration and the measuring values of dynamic mechanical properties of wood I. The experimental errors due to the measuring apparatus. Mokuzai Gakkaishi 21: 543-550.
  10. Kim, N. H., W. J. Hwang, S. M. Kwon, G. J. Kwon, and S. J. Lee. 2006. Anatomy of quercus variabilis charcoal manufactured at various temperatures. Mokchae Konghak 34: 1-8.
  11. Kong, S. W. and B. R. Kim. 2002. Adsorption characteristics of charcoals of major korean wood species and wood-based materials. Mokchae Konghak 30: 33-40.
  12. Kwon, S. M. and N. H. Kim. 2006. Investigation of carbonization mechanism of wood(I). Mokchae Konghak 34: 8-14.
  13. Lee, B. H., H. S. Kim, S. W. Choi, and H. J. Kim. 2006. Improvement of interfacial adhesion for surface treated rice husk flour-filled polypropylene bio-composites. Mokchae Konghak 34: 38-45.
  14. Lee, H. H. and G. U. Kim. 2003. Properties of Clay-wood ceramics from 3 layers-clay-wood particleboard. Mokchae Konghak 31: 80-87.
  15. Lee, H. H., Y. M. Cho, and H. S. Park. 2004. Effect of overlaid white charcoal board on the ethylene gas adsorption and preservation life of strawberry. Mokchae Konghak 32: 86-92.
  16. Lee, O. K., J. W. Choi, T. S. Jo, and K. H. Paik. 2007. Adsorption of Formaldehyde by Wood Charcoal-Based Building Materials. Mokchae Konghak 35: 61-69.
  17. Lee, P. W. and H. Park 1982. A study on the physical properties of the barkboard. Mokchae Konghak 10: 8-15.
  18. Lee, P. W., H. U. Yoon, D. J. Kim, and J. I. Son 1993. Fundamental study of manufacture possibility and composition ratio of sludge-particle board. Mokchae Konghak 21: 57-66.
  19. Lee, S. N., B. H. Lee, H. J. Kim, S. M. Kim, and Y. G. Eom. 2009. Properties evaluation of bio-composite by content and particle size of bamboo flour. Mokchae Konghak 37: 310-319.
  20. Matsumoto, T. and J. Tsutsumi 1968. Elastic properties of plywood in dynamic test I. Relation between static Young's modulus and dynamic Young's modulus. Mokuzai Gakkaishi 14: 65-69.
  21. Norimoto, M. 1982. Structure and properties of wood used for musical instruments 1. Mokuzai Gakkaishi 28: 407-413.
  22. Park, H. M. and H. S. Byeon. 2006. Measurement of dynamic MOE of 3-ply laminated woods by flexural vibration and comparison with bending strength and creep performances. Mokchae Konghak 34: 46-57.
  23. Park, H. M., D. H. Kang, N. R. Lim, S. K. Lee, K. W. Jung, J. C. Kim, and K. H. Cho. 2010. Effect of green tea content on static bending strength performances of hybrid boards composed of green tea and wood fibers. J. Agric. Life Sci. 44: 1-8.
  24. Park, H. M., S. K. Lee, J. H. Seok, N. K. Choi, C. B. Kwon, H. S. Heo, H. S. Byeon, J. K. Yang, and J. C. Kim. 2011a. Effect of green tea content on dynamic modulus of elasticity of hybrid boards composed of green tea and wood fibers, and prediction of static bending strength performances by flexural vibration test. Mokchae Konghak 39: 538-547.
  25. Park, H. M., S. K. Lee, J. H. Seok, N. K. Choi, C. B. Kwon, H. S. Heo, and J. C. Kim. 2011b. Effect of green tea and saw dust contents on static bending strength performance of hybrid boards composed of wood fiber, saw dust and green tea. J. Agric. Life Sci. 45: 41-46.
  26. Park, H. M., S. K. Lee, J. H. Seok, N. K. Choi, C. B. Kwon, H. S. Heo, H. S. Byeon, J. K. Yang, and J. C. Kim. 2012a. Effect of green tea and saw dust contents on dynamic modulus of elasticity of hybrid composite boards and prediction of static bending strength performances. J. Agric. Life Sci. 46: 9-17.
  27. Park, H. M., H. S. Heo, E. J. Sung, K. H. Nam, and J. S. Lim. 2012b. Effect of raw materials content on physical properties of hybrid composite boards composed of green tea, charcoals and wood fiber. Mokchae Konghak (in submitting).
  28. Park, H. M., H. S. Heo, K. H. Nam, and J. S. Lim. 2012c. Effect of raw materials content on mechanical performances of hybrid composite boards composed of green tea, charcoals and wood fiber. Mokchae Konghak (in submitting).
  29. Park, S. B. 2006. Physico-mechanical properties and formaldehyde abatement of particle board mixed with gingko tree leaves. J. Kor. For. En. 25: 28-33.