Journal of the Microelectronics and Packaging Society (마이크로전자및패키징학회지)

The Korean Microelectronics and Packaging Society (한국마이크로전자및패키징학회)
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Study on the Hydrophobicity and Mechanical Properties of Silica-Based Aerogel by Introducing Organic Benzene

벤젠 유기물 도입에 따른 실리카 기반 에어로겔의 소수성 및 기계적 특성 연구

  • Qi, Wang (Department of Materials Science and Engineering, Yonsei University) ;
  • Lee, Jihun (Department of Materials Science and Engineering, Yonsei University) ;
  • Dhavale, Rushikesh P. (Department of Materials Science and Engineering, Yonsei University) ;
  • Choi, Haryeong (Department of Materials Science and Engineering, Yonsei University) ;
  • Kim, Taehee (Department of Materials Science and Engineering, Yonsei University) ;
  • Park, Hyung-Ho (Department of Materials Science and Engineering, Yonsei University)
  • ;
  • 이지훈 (연세대학교 신소재공학과) ;
  • ;
  • 최하령 (연세대학교 신소재공학과) ;
  • 김태희 (연세대학교 신소재공학과) ;
  • 박형호 (연세대학교 신소재공학과)
  • Received : 2020.08.24
  • Accepted : 2020.12.07
  • Published : 2020.12.30
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Abstract

The silica aerogels with benzene-bridged were designed to have uniform network structure, ordered pore structure, improved mechanical properties and excellent textural properties. Adding organic to enhance the mechanical properties of silica aerogels is a common method, but textural properties of aerogels with organic are reduced due to the organic-inorganic phase separation. In this paper, we use a simple and low-cost method to increase mechanical properties while maintaining textural properties of SiO2 aerogels. Two types of benzene-bridged precursors were prepared to study the effect of the number of hydroxyl band on the textural and mechanical properties. The porous silica aerogel was prepared by a simple, cost effective and pollution-free sol-gel method. This method does not require additional silylating reagents. The benzene-bridged silica aerogel samples prepared had excellent textural properties, high specific surface area (1,326 ㎡/g), porous structure and hydrophobicity (>140°). The mechanical strength of 2T4 is more than 5 times that of pure silica aerogel.

실리카-벤젠 에어로겔은 균일하고 정렬된 네트워크 기공 구조, 개선된 기계적 특성을 갖도록 합성되었다. 실리카 에어로겔의 기계적 특성을 향상시키기 위해 유기물을 첨가하는 것이 일반적인 방법이지만, 기공 특성이 유-무기 상분리 현상으로 인해 감소한다. 본 연구에서는 실리카 기반 에어로겔의 기공 특성을 유지하면서 동시에 기계적 물성을 높이기 위해 간단하고 저렴한 방법을 사용하였다. 기공 및 기계적 특성에 대한 하이드록실 결합수의 영향을 연구하기 위해 두 가지 유형의 벤젠 브리지 전구체를 사용하였다. 다공성 실리카 에어로겔은 간단하고 비용-효율적이며 무공해인 졸-겔방법으로 제조되었다. 최종적으로 제조된 실리카-벤젠 에어로겔은 추가적인 silylating reagents없이 우수한 기공 특성, 높은 비 표면적(1,326 ㎡/g), 다공성 구조 및 소수성(>140°)을 가졌다. 일부 샘플(2T4)의 경우 기계적 강도는 순수 실리카 에어로겔의 5 배 이상을 보였다.

Keywords

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