| 초록 |
Barium titanate(BaTiO3) is widely used as a material in the electronics industry because it has a tremendously high dielectric constant than other ceramic materials. In particular, high energy storage capacitors have been developed by compounding with nanoscale BaTiO3 into a flexible polymer. However, when BaTiO3 is nanoscale, the surface energy is increased and it becomes physically and chemically unstable, so that the particles agglomerate in polymer matrix. Therefore, surface modification is used to disperse nanoparticles in polymer matrix. polyvinylpyrrolidone(PVP) was used for modification, because it is non-toxic, amphiphilic and is expected to improve compatibility with the polymer matrix and increase the dispersion. Also, to give functional group on the surface of BaTiO3, OH hydroxylation proceeded. In this study, the molecular weight and the concentration of PVP were varied to confirm the difference in modification. To compare properties, FT-IR, SEM, and TGA were measured. |
