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The Liquid Flame Proofing Agent's Permeating Effect of Wood Using Microwave

마이크로파를 이용한 목재의 액상방염약제 침투효과 연구

  • Park, Cheul-Woo (Department of Architectural Engineering, Tongmyong University) ;
  • Her, Jae-Won (Department of Architectural Engineering, Tongmyong University) ;
  • Lim, Nam-Gi (Department of Architectural Engineering, Tongmyong University)
  • Received : 2011.02.07
  • Accepted : 2011.05.07
  • Published : 2011.06.20

Abstract

By implementing an analysis on the liquid flame proof agent infiltration of microwave-heated wood under soaking conditions (room temperature soaking, heat soaking), its correlation with wood temperature, and the structure of wood and permeating components after soaking in flame proof agent, which was carried out as basic research in order to improve the fire resistance performance of the wood itself, it is found that the infiltration increases as the microwave heating time increases, while for heat soaking, it is found that high infiltration as well as the stable permeability of flame proof agent is achievable. Also, when the wood temperature is more than $80^{\circ}C$, the infiltration by the flame proof agent increased, and a very even infiltration of flame proof agent was observed, which implies that the liquid flame proof agent has a dependency on temperature change of the wood as a condition to penetrate into the wood. As a result of fine structure analysis, the flame proof agent transfer between cells through pits was considered as a cause to increase the infiltration of flame proof agent, and it is also shown that for heat soaking among the permeating component analysis, as the crystallized flame proof agent around the heartwood and sapwood inner pits increases, the flame proof agent can penetrate into the the heartwood part.

목재 자체의 화재저항성능 향상을 위한 기초연구로 마이크로파로 가열된 목재의 침지조건별(상온침지, 열기침지)로 액상 방염약제 침투량과 이에 따른 목재 온도와의 상관성, 방염약제 침투 후 목재의 미세구조와 침투성분 분석을 실시한 결과 마이크로파 가열시간이 높아질수록 침투량이 크게 증대되는 것으로 나타났으며 열기침지의 경우 높은 침투량은 물론 안정적인 방염약제 침투가 가능한 것으로 나타났다. 또한 목재의 온도가 $80^{\circ}C$ 이상 높은 상태에서는 방염약제 침투량이 증대 되었으며 매우 균일한 방염약제 침투성이 확보되는 것으로 나타나 액상의 방염약제는 목재내부로 침투되기 위한 조건으로서 목재의 온도변화에 대한 의존성을 가지는 것으로 판단된다. 미세구조 분석결과 벽공을 통한 방염약제의 세포간 이동성 향상이 방염약제의 침투량이 증대되는 원인으로 사료되며 침투성분 분석 중 열기침지의 경우 변재 및 심재 내부의 벽공 주변에 결정화된 방염약제 성분이 분석됨에 따라 열기침지 시 방염약제는 목재 심재부위까지 침투가 가능한 것으로 나타났다.

Keywords

References

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