Journal of Adhesion and Interface (접착 및 계면)

The Society of Adhesion and Interface, Korea (한국접착및계면학회)
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Preparation of O-I hybrid sols using alkoxysilane-functionalized amphiphilic polymer precursor and their application for hydrophobic coating

알콕시 실란기능화 양친성 고분자 전구체를 이용한 유-무기 하이브리드 졸 제조 및 이를 이용한 발수 코팅

  • Lee, Dae-Gon (Department of Materials Engineering, Kangwon National University) ;
  • Kim, Nahae (Department of Materials Engineering, Kangwon National University) ;
  • Kim, Hyo Won (Department of Materials Engineering, Kangwon National University) ;
  • Kim, Juyoung (Department of Materials Engineering, Kangwon National University)
  • 이대곤 (강원대학교 기능소재공학과) ;
  • 김나혜 (강원대학교 기능소재공학과) ;
  • 김효원 (강원대학교 기능소재공학과) ;
  • 김주영 (강원대학교 기능소재공학과)
  • Received : 2019.12.02
  • Accepted : 2019.12.20
  • Published : 2019.12.31
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Abstract

In this study, alkoxysilane-functionalized amphiphilic polymer (AFAP), which have hydrophilic segment and hydrophobic segment functionalized by alkoxysilane group at the same backbone, was synthesized and used as a dispersant and control agent for reaction rate in the preparation of colloidally stable organic-inorganic (O-I) hybrid sols. After reaction with fluorosilane compounds, fluorinated O-I hybrid sols were prepared and coated onto glass substrate to form hydrophobic O-I hybrid coating films through low-temperature curing process. Surface hardness and hydrophobicity of cured coating films were varied with type of solvent and composition of AFAP and fluorinated alkoxysilane compounds. At appropriate solvent and composition of fluorinated alkoxysilane compounds, O-I hybrid coating film having high transparency and surface hardness could be prepared, which could be applicable to cover window of solar cell and displays.

본 연구에서는 소수성 PPO 사슬과 친수성 PEO 사슬들이 동시에 존재하고, 반응성 알콕시 실란기를 가지고 있는 알콕시 실란 기능화 양친성 고분자 전구체 (Alkoxysilane-functionalized Amphiphilic Polymer, AFAP)를 합성하여, 이를 TEOS과의 Hydrolysis- Polycondensation 반응에서 분산안정제 및 반응속도 조절제로 이용하여서 유-무기 하이브리드 나노입자가 안정적으로 분산된 졸 (Sol)을 제조하였다. 제조된 Sol에 불소 함유 실란화합물을 혼합·반응하여서 불소함유 유-무기 하이브리드 Sol을 제조하였고, 이를 유리 기재에 코팅하고 저온 경화를 통해 기재위에 경화필름을 형성하였다. 형성된 경화 필름은 AFAP 및 불소 함유 실란화합물의 첨가량, 용매 종류에 따라서 표면 경도 및 발수 특성이 변화하였다. 최적의 용매 및 불소 함유 실란화합물 첨가량에서 태양전지나 디스플레이에 적용가능한 투명하면서도 견고한 유-무기 하이브리드 형태의 코팅필름 형성이 가능하였다.

Keywords

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