Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Properties of Sol-Gel Materials Synthesized from Colloidal Silica and Alkoxysilane Containing Epoxysilane

에폭시 실란을 함유한 콜로이드 실리카와 알콕시 실란간의 졸겔코팅제 합성과 특성

  • Kang, Dong-Pil (Advanced Materials and Application Research Laboratory, Korea Electrotechnology Research Institute) ;
  • Park, Hoy-Yul (Advanced Materials and Application Research Laboratory, Korea Electrotechnology Research Institute) ;
  • Ahn, Myeong-Sang (Advanced Materials and Application Research Laboratory, Korea Electrotechnology Research Institute) ;
  • Myung, In-Hye (Advanced Materials and Application Research Laboratory, Korea Electrotechnology Research Institute) ;
  • Choi, Jae-Hoon (Major in Environmental Materials Science, College of Agriculture and Life Science, Seoul National University) ;
  • Kim, Hyun-Joong (Major in Environmental Materials Science, College of Agriculture and Life Science, Seoul National University)
  • 강동필 (한국전기연구원 신소재응용연구그룹) ;
  • 박효열 (한국전기연구원 신소재응용연구그룹) ;
  • 안명상 (한국전기연구원 신소재응용연구그룹) ;
  • 명인혜 (한국전기연구원 신소재응용연구그룹) ;
  • 최재훈 (서울대학교 임산공학과) ;
  • 김현중 (서울대학교 임산공학과)
  • Received : 2005.08.05
  • Accepted : 2005.09.28
  • Published : 2005.12.10
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Abstract

Colloidal Silica (CS)/methyltrimethoxysilane (MTMS) and CS/MTMS/epoxysilane (ES) sol solutions were prepared using various synthesizing parameters such as reaction time and types of CS and silane. In order to understand their physical and chemical properties, sol-gel coating films on glass were fabricated. In the case of the CS/MTMS sol, the coating films had high contact angle and more enhanced flat surface than the CS/MTMS/ES sol. In the case of thermal stability, thermal degradation of the CS/MTMS and CS/MTMS/ES coating films did not occur up to $550^{\circ}C$ and $440^{\circ}C$, respectively. The coating films prepared from the CS/MTMS sol were thicker than those of the CS/MTMS/ES sol. In addition, the coating films prepared from single CS were thicker than those of mixed CS. Hardness of the coating films prepared from CS/MTMS increased by adding ES. In case of the mixed CS, the hardness decreased by adding ES.

콜로이드 실리카와 실란 종류에 따라서 졸겔코팅막의 특성에 미치는 영향을 조사하기 위하여 반응시간을 달리하여 졸을 합성하고, 합성된 졸의 코팅막 특성을 조사하였다. Colloidal Silica (CS)/methyltrimethoxysilane (MTMS) 졸겔코팅막은 CS/MTMS/epoxysilane (ES) 졸겔코팅막보다 접촉각이 증가하였고, 표면균질성이 우수하였다. CS/MTMS 코팅막은 $550^{\circ}C$까지 분해없이 잘 견디며, CS/MTMS/ES 코팅막은 $440^{\circ}C$까지 열분해없이 견디는 것으로 확인되었다. 단일 CS를 사용한 코팅막보다 혼합 CS를 사용한 코팅막이 코팅두께가 감소하였고, MTMS만을 사용한 것보다 MTMS/ES를 사용했을 때, 코팅두께가 더 감소하였다. 단일 CS를 사용한 경우 ES를 첨가하면 경도가 증가하지만, 혼합 CS를 사용한 코팅막의 경우 ES를 첨가하면 경도가 감소하였다.

Keywords

References

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