Journal
APPLIED SURFACE SCIENCE
Volume 277, Issue -, Pages 121-127Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2013.03.178
Keywords
Dielectric; Composites; Barium titanate; Atom transfer radical polymerization; Fluoropolymer
Categories
Funding
- National Natural Science Foundation of China [21074006]
- Major Project for Polymer Chemistry and Physics Subject Construction from Beijing Municipal Education Commission (BMEC)
Ask authors/readers for more resources
Polymer nanocomposite films, poly(1H,1H,2H,2H-perfluorooctyl methacrylate)@BaTiO3 (PPFOMA@BaTiO3), with enhanced dielectric permittivity was fabricated via a two-step processes, consisting of BaTiO3 nanoparticle surface modification and surface initiated atom transfer radical grafting polymerization (SI-ATRP). At first, BaTiO3 nanoparticles were treated by hydroxylation, silylation and amidation to offer their SI-ATRP capability. Then PPFOMA chains were grafted from the modified BaTiO3 nanoparticles by SI-ATRP at 70 degrees C to form core-shell composites. The effects of polymer structure and polymer/BaTiO3 ratios on dielectric properties were measured over a broad frequency from 40 Hz to 30 MHz at room temperature. The results showed that the dielectric constant (k) increased and dielectric loss reduced significantly with the addition of BaTiO3. The k of the composite was up to 7.4 at 100 kHz at room temperature when the BaTiO3 loading was up to 70.70 wt% which is almost three time of pure PPFOMA (k = 2.6). While the dielectric loss (tan delta) of PPFOMA@BaTiO3 composite was about 0.01, which was much lower than that of the pure PPFOMA (tan delta = 0.04). (c) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available