Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Preparation of Silylated Waterborne Polyurethane/Silica Nanocomposites Using Colloidal Silica

Colloidal Silica를 이용한 Silylated Waterborne Polyurethane/Silica Nanocomposite의 제조

  • Hong, Min Gi (Department of Chemical and Biochemical Engineering, Konyang University) ;
  • Shin, Yong Tak (Department of Chemical and Biochemical Engineering, Konyang University) ;
  • Choi, Jin Joo (Department of Chemical and Biochemical Engineering, Konyang University) ;
  • Lee, Won Ki (Technical Research Institute, Hanjin Chemical Co., LTD) ;
  • Lee, Gyoung Bae (Technical Research Institute, Hanjin Chemical Co., LTD) ;
  • Yoo, Byung Won (Technical Research Institute, Hanjin Chemical Co., LTD) ;
  • Lee, Myung Goo (Nanosphere Co., LTD) ;
  • Song, Ki Chang (Department of Chemical and Biochemical Engineering, Konyang University)
  • 홍민기 (건양대학교 화공생명학과) ;
  • 신용탁 (건양대학교 화공생명학과) ;
  • 최진주 (건양대학교 화공생명학과) ;
  • 이원기 (한진화학 주식회사 기술연구소) ;
  • 이경배 (한진화학 주식회사 기술연구소) ;
  • 유병원 (한진화학 주식회사 기술연구소) ;
  • 이명구 (나노스피어(주)) ;
  • 송기창 (건양대학교 화공생명학과)
  • Received : 2010.04.09
  • Accepted : 2010.04.29
  • Published : 2010.10.31
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Abstract

Silylated waterborne polyurethane was synthesized by capping the NCO groups of polyurethane prepolymer, prepared from isophrone diisocyanate, poly(tetramethylene glycol) and dimethylol propionic acid, with aminopropyl triethoxysilane. Subsequently, it was mixed with colloidal silica to prepare silylated waterborne polyurethane/silica nanocomposites. The average sizes of nanocomposite particles, measured by dynamic light scattering, showed almost the same value, irrespective of increasing silica content. However, the prepared nanocomposites showed better thermal stability than pure waterborne polyurethane.

Isophrone diisocyanate, poly(tetramethylene glycol)과 dimethylol propionic acid로부터 제조된, polyurethane 부분중합체의 미반응 NCO기를 aminopropyl triethoxysilane으로 capping시켜 silylated waterborne polyurethane을 합성하였다. 연이어 이것을 colloidal silica와 혼합하여 silylated waterborne polyurethane/silica nanocomposite를 제조하였다. 동적빛 산란법에 의해 측정된 nanocomposite 입자의 평균 크기는 silica 함유량과 무관하게 거의 일정한 수치를 나타내었다. 그러나 제조된 nanocomposite의 열적안정성은 순수한 waterborne polyurethane보다 우수하였다.

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