High-dielectric-constant three-phase flexible polyimide nanocomposite film with embedded conducting core-shell polymer nanoparticles = High-dielectric-constant three-phase flexible polyimide nanocomposite film with embedded conducting core-shell polymer nanoparticles

다국어 초록 (Multilingual Abstract)

A three-phase composite film with BaTiO3 and polypyrrole@polyimide (PPy@PI) core-shell nanoparticles embedded in a polyimide(PI) matrix was prepared by using a direct mixing and solution casting process. PPy@PI nanoparticles were used as the conductive filler which minimize the conducting path and provide space between each particle. Low loading level of PPy@PI nanoparticles in PI/BaTiO3 system enhanced the dielectric constant and suppressed the dielectric loss. The enhanced dielectric constant obtained for the three-phase composite film was found to be three times higher than that of the same system without PPy@PI. This is attributed to the synergistic enhancement of the ferroelectric ceramic filler (BaTiO3) and conductive filler (PPy) as well as the homogeneous dispersion. Such three-phase composite film is a potential material for embedded capacitors and can be fabricated easily into various shape due to its flexibility.