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Control of relative humidity in the static bag emission test method by adding water and its effect on formaldehyde emission intensity

백을 이용한 정적 방출시험 방법에서 수분공급을 통한 상대습도조절과 포름알데하이드의 방출강도에 미치는 영향

  • Park, Cheol-Soon (Department of Environmental Science, Kangwon National University) ;
  • Yoo, Ji-Ho (Department of Environmental Science, Kangwon National University) ;
  • Kim, Man-Goo (Department of Environmental Science, Kangwon National University)
  • 박철순 (강원대학교 자연과학대학 환경학과) ;
  • 유지호 (강원대학교 자연과학대학 환경학과) ;
  • 김만구 (강원대학교 자연과학대학 환경학과)
  • Received : 2011.05.12
  • Accepted : 2011.08.11
  • Published : 2011.08.25

Abstract

Rapid screening method for the determination of the emissions of pollutants from vehicle interior parts and materials have been developed as ISO 12219-2 which is using bag and based on a static condition. The method was not controlled humidity in the test bag, so it is not suitable test method for formaldehyde emission test which is highly related to humidity condition. In this study, possibility of control humidity in the static test bag by adding extra water and the effect of humidity condition for formaldehyde emissions have been investigated. The relative humidity in the test bag was affected not only amount of water added also material of test bag and test specimen. The emission intensity of formaldehyde was increased according to increasing relative humidity in test bag. But excessively supplied water was condensed on the inner surface of test bag and surface of sample specimen that were sorption formaldehyde and were reduced its emission intensity.

자동차 내장재에서 방출되는 오염물질들을 평가하는 간편한 방법으로 백을 이용하는 방법이 ISO 12219-2의 방법으로 개발중에 있다. 백을 사용하는 정적 시험방법은 방출시험 시 습도를 조절하지 않기 때문에 습도조건에 민감한 포름알데하이드의 방출시험에는 적당하지 않다. 따라서 이 연구에서는 백을 사용하는 정적 시험방법에서 추가로 수분을 공급하여 시험백안의 상대습도를 조절할 수 있는 가능성 및 상대습도가 포름알데하이드 방출농도에 미치는 영향에 대해 알아보았다. 시험 백 안의 상대습도는 주입한 수분의 양뿐만 아니라 시험백의 재질과 시험편의 종류에 큰 영향을 받았다. 그리고 시험 백 안의 상대습도가 증가할수록 포름알데하이드의 방출강도는 증가했지만 과다한 수분이 공급되면 백 내부 표면이나 시험편의 표면에 여분의 수분이 응축하여 여기에 방출된 포름알데하이드가 재흡수되어 측정된 포름 알데하이드의 방출강도가 낮게 나타났다.

Keywords

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