High permittivity nanocomposites fabricated from electrospun polyimide/BaTiO3 hybrid nanofibers

作者：Xu, Wenhui; Ding, Yichun; Jiang, Shaohua^*; Ye, Wan; Liao, Xiaojian; Hou, Haoqing^*

来源：Polymer Composites, 2016, 37(3): 794-801.

DOI：10.1002/pc.23236

• HIGH DIELECTRIC-CONSTANT
• ENERGY-CONVERSION
• STORAGE DEVICES
• COMPOSITES
• TECHNOLOGY
• CERAMICS
• FILMS

High dielectric permittivity, good mechanical properties, and excellent thermal stability are highly desired for the dielectric materials used in the embedded capacitors and energy-storage devices. This study reports polyimide (PI)/barium titanate (BaTiO3) nanocomposites fabricated from electrospun PI/BaTiO3 hybrid nanofibers. The PI/BaTiO3 nanocomposites were investigated using Fourier transform infrared spectroscopy, scanning electron microscope, transmission electron microscope, thermal gravimetric analysis, an electromechanical testing machine, a LCR meter and an electric breakdown strength tester. The results showed that BaTiO3 fillers were uniformly dispersed up to 50 vol% in PI matrix. The dielectric permittivity of the composite (50 vol% BaTiO3) was 29.66 with a dielectric loss of 0.009 at 1 kHz and room temperature. The dielectric permittivity showed a very small dependence on temperature (up to 150 degrees C) and frequency (100 Hz-100 kHz). The nanocomposites also showed high thermal stability and good mechanical properties. The PI/BaTiO3 nanocomposites will be a promising candidate for uses in embedded capacitors, especially in high temperature circumstance. POLYM. COMPOS., 37:794-801, 2016.

• 出版日期2016-3
• 单位江西师范大学