Preparation and Characterization of Polymer Coated BaTiO3 and Polyimide Nanocomposite Films

고분자로 표면 코팅된 BaTiO3와 이를 이용한 폴리이미드 나노복합필름의 제조 및 특성

  • Han, Seung San (Department of Fiber and Polymer Engineering, Hanyang University) ;
  • Han, Ji Yun (Polymeric Nanomaterials Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Choi, Kil-Yeong (Polymeric Nanomaterials Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Im, Seung Soon (Department of Fiber and Polymer Engineering, Hanyang University) ;
  • Kim, Yong Seok (Polymeric Nanomaterials Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology)
  • 한승산 (한양대학교 섬유고분자공학과) ;
  • 한지연 (한국화학연구원 고분자나노소재연구팀) ;
  • 최길영 (한국화학연구원 고분자나노소재연구팀) ;
  • 임승순 (한양대학교 섬유고분자공학과) ;
  • 김용석 (한국화학연구원 고분자나노소재연구팀)
  • Received : 2006.07.26
  • Accepted : 2006.08.18
  • Published : 2006.10.10

Abstract

We have prepared organophilic inorganic particles and polyimide (PI) nanocomposite having excellent thermal stability and high dielectric constant that can be used for electronic application such as capacitor. We have chosen barium titanate (BT), a high dielectric constantmaterial and its surface was coated with nylon 6 to improve the affinity with PI. The FT-IR and TEM studies showed that the organophilic inorganic particle (BTN) has a polymer shell with thickness of 5 nm. We have suggested that it is possible to control the thickness of coating surface and also indicated the relationship between the ratio of inside and outside radius of BTN and the weight fraction of BT. The PI nanocomposite films based on poly(amic acid) and BTN were prepared by cyclodehydration reaction. The homogeneous dispersion of BTN in PI matrix was identified by using SEM. We have investigated the effect of BTN content on the coefficient of thermal stability, integral procedural decomposition temperature (IPDT), and dielectric constant of PI nanocomposite films.

Keywords

polyimide;nanocomposite;dielectric constant;barium titanate;organophilic inorganic particle

Acknowledgement

Supported by : 한국화학연구원

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