Development of Flexible Piezoelectric Poly(dimethylsiloxane)鈥揃aTiO3 Nanocomposites for Electrical Energy Harvesting

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• 作者：Suryakanta Nayak ; Tapan Kumar Chaki ; Dipak Khastgir
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：October 1, 2014
• 年：2014
• 卷：53
• 期：39
• 页码：14982-14992
• 全文大小：732K
• ISSN：1520-5045

文摘

Flexible poly(dimethylsiloxane)鈥揃aTiO₃ (PDMS-BaTiO₃) nanocomposites of different compositions are prepared via room-temperature mixing for possible sensor and electrical energy-generation applications. The effect of BaTiO₃ particles (multipods) on electrical 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 mechanical properties of PDMS-BaTiO₃ composites are also composition-dependent where both tensile strength and percent elongation at break decreases 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.