High permittivity nanocomposites fabricated from electrospun polyimide/BaTiO3 hybrid nanofibers
High permittivity nanocomposites fabricated from electrospun polyimide/BaTiO3 hybrid nanofibers
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DOI：
10.1002/pc.23236
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发表时间：
2016-03
影响因子：
5.2
通讯作者：
Wenhui Xu;Yichun Ding;Shaohua Jiang;Wan Ye;Xiaojian Liao;Haoqing Hou
中科院分区：
文献类型：
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作者：
Wenhui Xu;Yichun Ding;Shaohua Jiang;Wan Ye;Xiaojian Liao;Haoqing Hou
高介电常数、良好的机械性能和优异的热稳定性是用于嵌入式电容器和储能器件的电介质材料的高度期望。本文报道了用静电纺丝法制备聚酰亚胺（PI）/钛酸钡（BaTiO 3）纳米复合材料。采用傅里叶变换红外光谱、扫描电镜、透射电镜、热重分析、机电试验机、LCR仪和电击穿强度测试仪对PI/BaTiO 3纳米复合材料进行了研究。结果表明，BaTiO 3在PI基体中均匀分散，分散度可达50%（体积分数）。复合材料（50体积%钛酸钡）的介电常数为29.66，在1 kHz和室温下的介电损耗为0.009。介电常数对温度（高达150°C）和频率（100 Hz-100 kHz）的依赖性非常小。纳米复合材料还显示出高的热稳定性和良好的机械性能。PI/BaTiO_3纳米复合材料在高温环境下的嵌入式电容器中具有良好的应用前景。Polym.比较器：2014.© 2014塑料工程师协会
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°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., 2014. © 2014 Society of Plastics Engineers