Graphite nanoplatelets and/or barium titanate/polymer nanocomposites: fabrication, thermomechanical properties, dielectric response and energy storage

Autor:	Kyriaki Kalaitzidou, D.L. Anastassopoulos, A. C. Patsidis, Georgios C. Psarras, A.A. Vradis
Rok vydání:	2014
Předmět:	chemistry.chemical_classification Materials science Polymer nanocomposite Composite number Dynamic mechanical analysis Dielectric Epoxy Polymer chemistry.chemical_compound chemistry visual_art Barium titanate visual_art.visual_art_medium Graphite Composite material
Zdroj:	Journal of the Chinese Advanced Materials Society. 2:207-221
ISSN:	2168-1031 2224-3682
DOI:	10.1080/22243682.2014.937742
Popis:	Epoxy composites reinforced with (1) micro-size barium titanate (BaTiO3), (2) nano-size BaTiO3, (3) graphite nanoplatelets (GNP), (4) combination of micro and nano BaTiO3 and (5) combination of BaTiO3 and GNP were fabricated and studied, in terms of the type, size and amount of the filler content. Scanning electron microscopy and X-ray diffraction spectra were employed for the investigation of the systems’ morphology. Dynamic mechanical analysis, static mechanical tests and broadband dielectric spectroscopy were used in order to study the properties of the produced systems. Reinforced systems exhibit higher values of storage modulus and dielectric permittivity compared to neat epoxy. Dielectric spectra reveal the presence of two relaxation processes arising from the glass to rubber transition of the polymer matrix (α-mode), and the re-orientation of polar side groups of the polymer chains (β-mode). Finally, the energy storage efficiency of the prepared composite systems was examined in terms of the energy...
Databáze:	OpenAIRE
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