Premium
Flexible /PET/batio 3 / layer–layer composite film with enhanced dielectric properties fabricated by highly loaded /batio 3 / coating with acrylic resin as binder
Author(s) -
Zhou Yan,
Wang Li,
Ma Yuhong,
Chen Dong,
Zhao Changwen,
Yang Wantai
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.42508
Subject(s) - materials science , dielectric , composite material , composite number , barium titanate , coating , layer (electronics) , scanning electron microscope , substrate (aquarium) , ceramic , oceanography , optoelectronics , geology
Flexible layer–layer poly(ethylene phthalate) (PET)/BaTiO 3 composite films with enhanced dielectric permittivity were fabricated by spin coating method, consisting of PET substrate film layer and modified BaTiO 3 /acrylic resin hybrid coating layer. The thickness of coating layer was less than 3 μm (about 2% of PET film thickness), and therefore, the PET/barium titanate (BT) composite films remained flexible even at high volume fraction of BaTiO 3 fillers. The volume contents of BaTiO 3 were varied from 0 to 80%, and the solid contents of BaTiO 3 /acrylic resin were in the range of 51.8–72.9%. Scanning electron microscopy showed strong interaction of finely dispersed BaTiO 3 particles with acrylic resin. Morphological profile also displayed uniform coating layer of modified BaTiO 3 /acrylic resin and its strong adhesion with PET film. The dielectric constant of the PET/BaTiO 3 composite films increased by about 26% at 60 vol % BaTiO 3 loading when compared with the pristine PET film, whereas the dielectric loss decreased slightly. In addition, PET‐grafted poly(hydroxylethyl methacrylate) brushes were used as substrate to introduce covalent bonding with the coating layer. Further enhancement of dielectric constant and reduction of dielectric loss were realized when compared with the composite films with bare PET substrate. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42508.