Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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A Study on Insulation·Fire Proof Materials Using Silica Aerogels

실리카 에어로젤을 이용한 단열·내화재 개발에 관한 연구

  • Cho, Myung Ho (Division of Global Entrepreneurship, Hoseo University) ;
  • Hong, Sungchul (Department of Convergence Technology for Safety and Environment, Hoseo University)
  • 조명호 (호서대학교 글로벌창업전공) ;
  • 홍성철 (호서대학교 안전환경기술융합학과)
  • Received : 2015.07.03
  • Accepted : 2015.10.08
  • Published : 2015.10.31
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Abstract

In this study, silica aerogel-glass wool composites were developed for improvement of thermal conductivity and overcoming the water adsorption of glass wool boards. Silica aerogel-glass wool composites were prepared by glass wool and silica aerogel with liquid binder. Mixtures with binder were composed of CMC (carboxymethyl cellulose) and silica aerogel for glass wool board. Silica aerogel-glass wool composite boards were had $0.065g/cm^3$ density by impregnation silica aerogel where from origin glass wool board at $0.048g/cm^3$ density. Thermal conductivity of silica aerogel-glass wool composites were 0.0315 W/mK (up to 7.4% thermal resistance) and fire penetration time came to 362 seconds (up to 2.7 times stronger than origin glass wool board). In addition, hydrophobic aerogel characteristics prevented the adsorption of water onto silica aerogel-glass wool composite boards that was good for lightweight.

본 연구에서는 기존의 글라스울의 흡습에 의한 변형을 해결하고 단열성능향상을 위해 실리카 에어로젤을 이용한 단열재를 개발하였다. 글라스울 단열재에 액상의 혼합 바인더를 이용하여 실리카에어로젤이 함침된 글라스울 복합체를 제조하였다. 액상의 혼합 바인더는 수용성바인더(CMC, carboxymethyl cellulose)와 물에 분산시킨 실리카 에어로젤을 이용하여 준비하였다. 초기 $0.048g/cm^3$의 밀도를 갖는 글라스울 보드를 준비하고 실리카 에어로젤을 함침시켜 $0.065g/cm^3$의 밀도를 갖는 단열보드를 제작할 수 있었다. 이렇게 제조된 실리카 에어로젤 함침 글라스울 보드 복합체는 단일 글라스울 보드의 단열성능보다 7.4% 향상된 0.0315 W/mK의 열전도율(thermal conductivity)을 나타내었다. 제조된 실리카 에어로젤-글라스울 복합체는 불꽃 관통시험에서 362초간 내화 저항성을 나타내어 단일 글라스울 보드에 비하여 2.7배나 높은 내화성능을 보였다. 또한 일반 글라스울 보드는 흡습에 의하여 수직방향으로 처짐현상을 나타내는 단점이 있었으나, 실리카 에어로젤이 함침된 보드에서는 실리카 에어로젤의 발수특성으로 인하여 높은 내수성능을 나타내는 것을 확인하였다.

Keywords

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