科研之友
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摘要
Flexible poly(dimethylsiloxane)- BaTiO3 ( PDMS-BaTiO3) nanocomposites of different composition are prepared via room temperature mixing for possible sensor and electrical energy generation applications. The effect of BaTiO3 particles (multipods) on electricla properties is extensively studied, and it is found that permittivity of composites is increased significantly whereas the volume resistivity is decreased with the increase in BaTiO3 concentration. The mechanicla properites of PDMS-BATiO(3) composites are also composition dependent where both tensile strength and percent elongation at break decrease with increase in BaTiO3 particle concentration because of the nonreinforcing nature of BaTiO3 particles as is apparent from kraus plots. These composites have excellent piezoelectric behavior, where the dielectric properties of these composites changed substantially with the change in the applied stress. The temperature-dependent dielectric properties reveal that dielectric properties increased with a rise in temperature up to a certain limit and decreased thereafter. Filler shape, dispersion, and distribution in the matrix polymer were observed through field emission scanning electron microscopy.
- 出版日期2014-10-1
