Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27808
Title: High dielectric permittivity and low percolation threshold in nanocomposites based on poly(vinylidene fluoride) and exfoliated graphite nanoplates
Authors: He, F
Lau, S
Chan, HL 
Fan, J
Issue Date: 2009
Publisher: Wiley-VCH
Source: Advanced materials, 2009, v. 21, no. 6, p. 710-715 How to cite?
Journal: Advanced materials 
Abstract: A nanocomposite system consisting of poly(vinylidene fluoride) and exfoliated graphite nanoplates (PVDF/xGnPs) was proposed. The xGnPs were selected as the conductive filler, because of their good electrical and thermal conductivity, high mechanical strength, and large aspect ratio. A required amount of xGnPs was first ultrasonically dispersed in 200 mL of N,N-dimethylformamide (DMF) for 1 hour. Then, PVDF was added into the xGnP suspension, and the mixture was poured onto a glass plate to form a thin film after stirring for 30 mm at 80°C, and ultrasonicating for another 2 h, and dried at 70°C for 3 days. Samples for testing were made by hot pressing several solution cast films stacked together at 200°C. The dielectric properties of the samples, when measured, showed a significant increment because of the inhomogeneous dispersion of xGnPs in the PVDF polymer matrix.
URI: http://hdl.handle.net/10397/27808
ISSN: 0935-9648
EISSN: 1521-4095
DOI: 10.1002/adma.200801758
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