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Surface Modification of Flake-Shaped Inorganic Mica and Their Cool Paint Performances

판상형 무기소재인 Mica의 표면개질 및 차열페인트의 특성 평가

  • Park, Jeong Min (Eco Composite Materials Team, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Hee Jung (Eco Composite Materials Team, Korea Institute of Ceramic Engineering and Technology) ;
  • Yoo, Jung Whan (Eco Composite Materials Team, Korea Institute of Ceramic Engineering and Technology)
  • 박정민 (한국세라믹기술원 에코복합소재팀) ;
  • 김희정 (한국세라믹기술원 에코복합소재팀) ;
  • 유중환 (한국세라믹기술원 에코복합소재팀)
  • Received : 2015.09.25
  • Accepted : 2015.11.18
  • Published : 2016.02.10

Abstract

In this study, the mica used as a thermal-insulation material was modified with a silane coupling agent, octyltriethoxysilane (OTES), to improve its hydrophobicity. The modified mica was characterized using FT-IR spectrometer, water wettability test, and water contact angle measurement. The analysis exhibits that OTES for the modified mica sample was well bonded chemically and drastically enhanced the hydrophobicity. The reflectance observed as 73.9% (mica) and 86.4% (OTES/mica), respectively, for OTES/mica was improved about 12.5% before any modifications. Also the modified mica sample showed $7.2^{\circ}C$ decrease in the thermal-insulation performance of cool paints compared to that of using unmodified mica, indicating that the modification of mica with silane coupling agents could be effective in enhancing the thermal-insulation performance of the cool paint.

Acknowledgement

Supported by : 한국산업기술평가관리원

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