Preparation of organosilicate/PVDF composites with enhanced piezoelectricity and pyroelectricity by stretching

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• 作者：Fu-An He^a ; ^{he-fu-an@163.com" class="auth_mail" title="E-mail the corresponding author} ; Kai Lin^a ; Dong-Liang Shi^b ; Hui-Jun Wu^c ; Hua-Kun Huang^c ; Jun-Jun Chen^a ; Fang Chen^a ; Kwok-Ho Lam^b ; ^{kokokh.lam@polyu.edu.hk" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Poly(vinylidene fluoride) ; Organosilicate ; Composites ; Piezoelectricity ; Pyroelectricity
• 刊名：Composites Science and Technology
• 出版年：2016
• 出版时间：12 December 2016
• 年：2016
• 卷：137
• 期：Complete
• 页码：138-147
• 全文大小：2702 K

文摘

Organosilicate (OS)/poly(vinylidene fluoride) (PVDF) composites containing 2 and 4 wt% OS were prepared by the melt-blending method. It was confirmed by scanning electron microscopy that OS was homogeneously distributed in the PVDF matrix. The results of differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), and wide angle X-ray diffraction indicated that the incorporation of OS along with stretching treatment could effectively transform PVDF crystallization from the stable α phase to the most useful electroactive β phase. The interfacial interaction between PVDF and OS was analyzed by X-ray photoelectron spectroscopy and zeta potential. The dielectric properties, AC conductivities, mechanical properties, Rockwell hardness, and thermal conductivity of resultant OS/PVDF composites have been measured. More importantly, the piezoelectric coefficient d₃₃ and pyroelectric coefficient p of stretched OS/PVDF composites were enhanced significantly in comparison with the pure PVDF, making them promising materials for self-powered electronic systems, thermal detectors, sensors, and actuators.