• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >The generation mechanism of negative permittivity in multi-walled carbon nanotubes/polyaniline composites
【24h】

The generation mechanism of negative permittivity in multi-walled carbon nanotubes/polyaniline composites

机译：碳纳米管/聚苯胺复合材料中负介电常数的产生机理

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Conductive polymers filled with carbon nanotubes have been proved to have negative permittivity but the mechanism of its strange properties has not been intensively studied. Thus we need to study the mechanism of negative permittivity of conductive polymer metamaterials and reveal the relationship between the permittivity and fillers. Polyaniline (PANI) filled with multi-walled carbon nanotubes (MWCNTs) is chosen as the target to explore the generation mechanism of the negative dielectric properties. PANI with low resistivity (CPA0) and MWCNTs/CPA0 composites synthesized are found to possess negative permittivity. A structure model of "double nano wires" is initially constructed after some structure and properties analysis, and the amplification mechanism of MWCNTs on negative permittivity of CPA0 and the transition phenomenon of permittivity from negative to positive value are correlated with this model. In order to verify the model, PANI with high resistivity (CHK0) and MWCNTs/CHK0 composites are prepared. The surface of MWCNTs is then coated with polyvinylpyrrolidone (PVP). These results further demonstrate the validity of the structure model of "double nano wires" to account for the negative permittivity of MWCNTs/PANI composites. This study provides an experimental basis on further exploration of metamaterials of carbon nanotube/conductive polymer composites.
机译：已证明填充有碳纳米管的导电聚合物具有负介电常数，但尚未深入研究其奇怪性质的机理。因此，我们需要研究导电聚合物超材料的负介电常数的机理，并揭示介电常数与填料之间的关系。以填充多壁碳纳米管（MWCNTs）的聚苯胺（PANI）为靶，探讨负介电性能的产生机理。发现低电阻率的PANI（CPA0）和合成的MWCNT / CPA0复合材料的介电常数为负。通过对结构和性能的分析，初步构建了“双纳米线”的结构模型，并将其与CPA0负介电常数的放大机理以及介电常数从负向正的转变现象进行了关联。为了验证该模型，制备了具有高电阻率的PANI（CHK0）和MWCNTs / CHK0复合材料。然后将MWCNT的表面涂覆聚乙烯吡咯烷酮（PVP）。这些结果进一步证明了“双纳米线”结构模型对MWCNTs / PANI复合材料的负介电常数的影响。该研究为进一步探索碳纳米管/导电聚合物复合材料的超材料提供了实验基础。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号