Understanding the enhanced electrorheological effect of reduced graphene oxide-supported polyaniline dielectric nanoplates by a comparative study with graphene oxide as the support core

IF 3.8 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Jinhua Yuan, Yudong Wang, Liqin Xiang, Xiaopeng Zhao, Jianbo Yin
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引用次数: 7

Abstract

Graphene has attracted scientific interest as a substrate or additive for developing high-performance stimuli-responsive materials. Research on graphene-based polymer dielectric composites has shown an enhanced electroresponsive electrorheological (ER) effect. However, the mechanism behind the enhanced electroresponse is still incompletely understood. Here, an investigation was performed into dielectric polarization and the ER effect of reduced graphene oxide-supported polyaniline nanoplates by comparing them with pure granular polyaniline and graphene oxide-supported polyaniline nanoplates based on dielectric spectroscopy and rheologic analysis. We discovered that both anisotropic morphology and electrical properties have dominant roles in the enhanced ER effect of reduced graphene oxide-supported polyaniline nanoplates, whereas only anisotropic morphology has a dominant role in the enhanced ER effect of graphene oxide-supported polyaniline nanoplates. The analysis also showed that reduced graphene oxide-supported polyaniline nanoplates have a good ER response to both DC and AC electric field actions in the wide shear rate region. This is highly desirable for practical engineering applications. Therefore, the analysis reveals the reason for the enhanced ER effect of reduced graphene oxide-supported polyaniline nanoplates and also may provide a guide for designing high-performance ER materials for practical engineering applications by combining the advantages of conducting a reduced graphene oxide core and ER active shell.

Abstract Image

通过以氧化石墨烯为支撑芯的对比研究,了解还原氧化石墨烯负载聚苯胺介质纳米板增强的电流变效应
石墨烯作为开发高性能刺激响应材料的衬底或添加剂引起了科学界的兴趣。石墨烯基聚合物介电复合材料具有较强的电响应电流变效应。然而,电反应增强背后的机制仍然不完全清楚。本文通过电介质光谱和流变学分析,将还原氧化石墨烯负载的聚苯胺纳米片与纯颗粒聚苯胺和氧化石墨烯负载的聚苯胺纳米片进行比较,研究了还原氧化石墨烯负载的聚苯胺纳米片的介电极化和ER效应。我们发现,各向异性形貌和电学性质在还原氧化石墨烯负载的聚苯胺纳米板的内电效应增强中起主导作用,而各向异性形貌在氧化石墨烯负载的聚苯胺纳米板的内电效应增强中起主导作用。分析还表明,还原氧化石墨烯负载的聚苯胺纳米板在宽剪切速率区域对直流和交流电场作用都有良好的电流响应。这对于实际工程应用是非常理想的。因此,分析揭示了还原氧化石墨烯负载的聚苯胺纳米板增强ER效应的原因,并结合还原氧化石墨烯芯和ER活性壳的优势,为设计实际工程应用的高性能ER材料提供指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
IET Nanodielectrics
IET Nanodielectrics Materials Science-Materials Chemistry
CiteScore
5.60
自引率
3.70%
发文量
7
审稿时长
21 weeks
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