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Fluorine ligand exchange effect in poly (vinylidenefluoride-co-hexafluoropropylene) with embedded fluorinated barium titanate nanoparticles

Authors
Han, WoojeYoo, ByungwookKwon, Kwang-HoCho, Hyung HeePark, Hyung-Ho
Issue Date
30-11월-2016
Publisher
ELSEVIER SCIENCE SA
Keywords
Fluorination; Barium titanate; Nanocomposite; Dielectric properties; Polymer
Citation
THIN SOLID FILMS, v.619, pp.17 - 24
Indexed
SCIE
SCOPUS
Journal Title
THIN SOLID FILMS
Volume
619
Start Page
17
End Page
24
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/86790
DOI
10.1016/j.tsf.2016.10.043
ISSN
0040-6090
Abstract
Poly(vinylidenefluoride-co-hexafluoropropylene) (PVdF-HFP) nanocomposites were prepared with fluorinated barium titanate (BaTiO3) nanoparticles. BaTiO3 nanoparticles was treated with 2,2,2-trifluoroacetic acid in Novec-7500 and the modified surface characteristics of the nanoparticles showed good solubility in the fluorous solvent and fluorous polymer. The optimized fluorinated BaTiO3 condition had explored by controlling temperature and ligand ratio. The prepared nanocomposite through fluorinated nanoparticles were characterized by using Fourier transform infrared spectroscopy, X-ray diffraction, impedance spectroscopy and atomic force microscopy in order to investigate their structural and electrical properties. Root mean square roughness of nanocomposites was increased only 0.48 nm after adding 20 vol.% of fluorinated BaTiO3 nanoparticles. Also, dielectric constant of nanocomposite was predicted and agreed well with experimental data through the modified Kerner model. Dielectric constant of PVdF-HFP nanocomposite was increased about 15 thorough an addition of 20 vol.% of fluorinated BaTiO3 nanoparticles. The application of near edge X-ray absorption fine structure spectroscopy of PVdF-HFP/fluorinated BaTiO3 nanocomposites was presented. (C) 2016 Elsevier B.V. All rights reserved.
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