Reduced polyaniline decorated reduced graphene oxide/polyimide nanocomposite films with enhanced dielectric properties and thermostability
Reduced polyaniline decorated reduced graphene oxide/polyimide nanocomposite films with enhanced dielectric properties and thermostability
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还原聚苯胺修饰的还原氧化石墨烯/聚酰亚胺纳米复合薄膜具有增强的介电性能和热稳定性
DOI：
10.1016/j.compositesa.2018.03.035
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发表时间：
2018-06-01
影响因子：
8.7
通讯作者：
Zhuang, Qixin
中科院分区：
文献类型：
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作者：
Feng, Hao;Fang, Xinliang;Zhuang, Qixin
本研究报道了具有增强介电性能和热稳定性的还原聚苯胺修饰还原氧化石墨烯/聚酰亚胺（RGO@R-PANI/PI）纳米复合膜的合成和表征。R-PANI修饰在RGO表面的空间位阻效应不仅阻止了RGO的聚集，而且改善了RGO@R-PANI纳米片在PI基体中的分散性，使RGO@R-PANI/PI纳米复合膜的介电常数（e）和介电损耗（tan）均比RGO/PI纳米复合膜高。RGO质量分数为3.44%的RGO@R-PANI/PI纳米复合膜的介电常数最高（25.84），介电损耗最低（0.11）。此外，20重量% RGO@R-PANI/PI纳米复合材料膜的5重量%重量损失温度为480 ° C，表明纳米复合材料膜是极端温度下介电材料的良好候选物。
This study reports the synthesis and characterization of reduced polyaniline decorated reduced graphene oxide/polyimide (RGO@R-PANI/PI) nanocomposite films with enhanced dielectric properties and thermostability. The steric effects of R-PANI decorated on the surface of RGO not only prevented the aggregation of RGO but also improved the dispersion of RGO@R-PANI nanosheets in the PI matrix, leading to higher dielectric constant (e) and lower dielectric loss (tans) of the RGO@R-PANI/PI nanocomposite films than those of the RGO/PI nano composite films. The highest dielectric constant (25.84) was observed in the 20 wt% RGO@R-PANI/PI nano composite film (the mass fractions of RGO was 3.44%) with a low dielectric loss of 0.11 at 1 kHz. Furthermore, the 5 wt% weight loss temperature of the 20 wt% RGO@R-PANI/PI nanocomposite films was 480 degrees C, indicating the nanocomposite films are good candidates for dielectric materials under extreme temperature.