Journal of agriculture & life science (농업생명과학연구)

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

Effect of Green Tea Content on Static Bending Strength Performance of Hybrid Boards Composed of Green Tea and Wood Fibers

녹차-목재섬유복합보드의 정적 휨 강도성능에 미치는 녹차배합비율의 영향

  • Park, Han-Min (Div. of Environmental Forest sci.(Insti. of Agric. & Life Sci.), Gyeongsang Nat'l Univ.) ;
  • Kang, Dong-Hyun (Div. of Environmental Forest sci.(Insti. of Agric. & Life Sci.), Gyeongsang Nat'l Univ.) ;
  • Lim, Na-Rea (Div. of Environmental Forest sci.(Insti. of Agric. & Life Sci.), Gyeongsang Nat'l Univ.) ;
  • Lee, Soo-Kyeong (Div. of Environmental Forest sci.(Insti. of Agric. & Life Sci.), Gyeongsang Nat'l Univ.) ;
  • Jung, Kang-Won (Institute of Hadong Green Tea) ;
  • Kim, Jong-Chul (Institute of Hadong Green Tea) ;
  • Cho, Kyeong-Hwan (Institute of Hadong Green Tea)
  • 박한민 (경상대학교 환경산림과학부(농업생명과학연구원)) ;
  • 강동현 (경상대학교 환경산림과학부(농업생명과학연구원)) ;
  • 임나래 (경상대학교 환경산림과학부(농업생명과학연구원)) ;
  • 이수경 (경상대학교 환경산림과학부(농업생명과학연구원)) ;
  • 정강원 (하동녹차연구소) ;
  • 김종철 (하동녹차연구소) ;
  • 조경환 (하동녹차연구소)
  • Received : 2010.07.14
  • Accepted : 2010.10.19
  • Published : 2010.10.31
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Abstract

In this study, eco-friendly hybrid composite boards were manufactured from green tea and wood fibers for application as interior materials with various functionalities of green tea and strong strength properties of wood fibers. In this relation, the effect of green tea content on the static bending strength performances of these green tea and wood fibers composite boards were investigated. Static bending strengths of hybrid composite boards were lower than those of control boards and decreased with the increase of green tea content. Also, the strength performances appeared to be somewhat different by resin type used for board manufacture. The hybrid composite boards manufactured from $E_1$ grade urea resin adhesive, which has higher molar ratio of formaldehyde to urea than that of $E_0$ grade one, were 1.08~1.53 times higher in bending modulus of elasticity (MOE) and 1.19~1.82 higher in modulus of rupture (MOR) than that manufactured from $E_0$ grade. And, the differences of MOE and MOR between hybrid composite boards manufactured from $E_0$ grade and $E_0$ grade urea resin adhesive increased with the increase of green tea content. In the case of hybrid composite boards manufactured from $E_1$ grade urea resin adhesive, the MOR was within 0.94~1.03 times the commercial medium density fiberboard. Thus, it was thought that eco-friendly hybrid composite boards with various functionalities and strong strength performances could be manufactured from green tea and wood fibers.

이 연구에서는 녹차를 이용한 친환경 복합보드를 건축내장재로의 활용을 위하여, 녹차의 다양한 기능성과 목재섬유의 우수한 강도특성을 살려 녹차-목재섬유 복합보드를 제작하였고, 녹차-목재섬유 복합보드의 정적 휨강도성능에 미치는 녹차와 목재섬유 배합비율 및 접착제의 영향을 조사하였다. 녹차-목재섬유복합보드의 휨 강도성능은 녹차의 배합에 따라 대조보드 (control 보드) 보드의 그것보다 감소하였는데, 그 감소비율은 전반적으로 녹차배합비율이 증가할수록 커지는 경향을 나타내었다. 또한, 보드제조에 사용된 수지의 종류에 따라 강도성능의 차이가 나타났는데, 포름알데히드 방산량이 많은 $E_1$급 요소수지가 $E_0$급 요소수지보다 휨 탄성계수에서는 1.08~1.53배 그리고 휨 강도는 1.19~1.82배의 더 높은 값을 나타내었으며, 녹차의 배합비율이 커질수록 양자의 차이는 커지는 것이 확인되었다. 휨 강도는 $E_1$급 요소수지의 경우, 시판용 중밀도섬유판 (medium density fiberboard, MDF)의 0.94~1.03배의 값을 나타내어 시판용 중밀도섬유판과 거의 차이가 없었고, 녹차와 목재섬유를 복합한 우수한 친환경 기능성복합보드제조가 가능한 것이 밝혀졌다.

Keywords

Acknowledgement

Supported by : 하동녹차연구소

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