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Evaluation of Electromagnetic Pulse Shielding Effectiveness and Bonding Performance of Inorganic Paint based on Carbon Material

탄소재료 기반 무기계 도료의 전자파 차폐성능 및 부착성능 평가

  • Jang, Kyong-Pil (Department of Living and Built Environment Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Kim, Sang-Hee (Department of Living and Built Environment Research, Korea Institute of Civil Engineering and Building Technology)
  • 장경필 (한국건설기술연구원 국민생활연구본부) ;
  • 김상희 (한국건설기술연구원 국민생활연구본부)
  • Received : 2020.10.20
  • Accepted : 2021.01.08
  • Published : 2021.01.31

Abstract

In various industrial fields and infrastructure based on electronic components, such as communication equipment, transportation, computer networks, and military equipment, the need for electromagnetic pulse shielding has increased. Two methods for applying electromagnetic pulse shielding are effective. The first is construction using shielding materials, such as shielding concrete, shielding doors, and shielding windows. The other is coating shielding paints on non-shielding structures. Electromagnetic pulse shielding paints are made using conductive materials, such as carbon nanotubes, graphite, carbon black, and carbon fiber. In this paint, electromagnetic pulse shielding performance is added to the commonly used water-based paint. In this study, the shielding effectiveness and bonding performance of paints using conductive graphite and carbon black as shielding materials were evaluated to develop electromagnetic pulse shielding inorganic paints. The shielding effectiveness and bonding performance were evaluated by applying six mixtures composed of different kinds and amounts of shielding material. The mixture of conductive graphite and carbon black at a weight ratio of 1:0.2 was the most effective in shielding as 33.6 dB. Furthermore, the mixture produced using conductive graphite only showed the highest bonding performance of 1.06 MPa.

전기 전자 부품을 기반으로 하는 통신장비, 컴퓨터, 이동 수단, 전산망, 군사용 장비 등 여러 산업 분야 및 사회기반시설에 있어 전자파 차폐의 필요성이 커지고 있다. 구조물의 전자파 차폐 방법은 차폐 콘크리트, 차폐 문, 차폐 창문과 같이 차폐성능을 가지고 있는 자재를 사용하여 시공하는 방법, 그리고 차폐성능이 없는 재료에 차폐 도료를 코팅하는 방법이 있다. 전자파 차폐 도료는 탄소나노튜브, 흑연, 카본 블랙, 탄소 섬유와 같은 전도성 물질을 사용하여 만들어지며, 일반적으로 사용되고 있는 수성도료에서 전자파 차폐 성능이 추가된 도료이다. 이 연구에서는 전자파 차폐 무기계 도료를 개발하기 위한 목적으로 전도성 흑연, 카본 블랙을 차폐원료로 사용한 도료의 차폐성능 및 부착성능을 평가하였다. 차폐 재료의 종류 및 사용량을 달리한 6개 배합에 대해 차폐성능과 부착강도를 평가하였다. 실험 결과, 전도성 흑연과 카본 블랙을 무게비 1:0.2로 혼합한 배합이 33.6 dB로 차폐성능이 가장 좋은 것으로 확인되었고, 부착성능은 전도성 흑연만 사용한 배합이 1.06 MPa로 가장 높은 것으로 확인되었다.

Keywords

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