Abstract
AbstractA procedure is proposed to prepare poly(vinylidene fluoride) (PVDF) multiwalled carbon nanotubes (MWCNTs) nanocomposite thin films with improved mechanical and dielectric properties compared to the pure PVDF films. The PVDF/MWCNT mixture with a composition range from 0.0 to 5.0% MWCNTs by weight was formed using solution blending and the ultrasonic dispersion method and then spin coated on a rotating glass substrate to produce films nearly 20 μ thick. Results indicate that the appropriate addition of MWCNTs (up to 3.0 wt%) to PVDF can significantly increase its elastic modulus while decrease its fracture toughness. The elastic modulus shows softening at a 5.0 wt% MWCNT loading. The DC and AC conductivity of the composite films were also examined with various MWCNTs concentrations. The dielectric constants were found more than doubled for 0.5 wt% MWCNTs composite compared to the values for the pure PVDF. POLYM. COMPOS., 2012. © 2011 Society of Plastics Engineers
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