...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Microporous and mesoporous materials: The offical journal of the International Zeolite Association >Facile fabrication of SBA-15/polypyrrole composites with long-rod shape for enhanced electromagnetic wave absorption
【24h】

Facile fabrication of SBA-15/polypyrrole composites with long-rod shape for enhanced electromagnetic wave absorption

机译：具有长杆形状的SBA-15 /聚吡咯复合材料的舒适性，用于增强电磁波吸收

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

Functionalized SBA-15 has attracted considerable interest owing to its highly ordered mesoporous structure, well thermal stability and great potential applications. Meanwhile, as was demonstrated, polypyrrole (PPy) with good electrical conductivity is also a very popular absorber-related candidate. Herein, long-rod shape SBA-15/PPy-X composites were successfully synthesized via a simple hydrothermal treatment by combining in situ chemical oxidative polymerization method. The SBA-15/PPy-X composites exhibited effective absorption band (RL < -10 dB) and electromagnetic wave absorption capacities in comparison with the pristine SBA-15 sample, which were pertinent to the properties of strong dielectric loss and better impedance matching, implying enhanced dielectric properties by modifying with suitable amount of PPy species. The minimum reflection loss (RL) of SBA-15/PPy-0.5 composites reached -44.7 dB with a very low filler loading (15 wt%), corresponding to the thickness of 3.5 mm at 8.9 GHz. Besides, the effective absorption bandwidth was up to 6.1 GHz (11.1-17.2 GHz) and 3.8 GHz (7.4-11.2 GHz) with the thickness of 2.5 mm and 3.5 nun, respectively, which can cover most of the Ku-band (12-18 GHz) and X-band (8-12 GHz). The results indicated that the newly designed silica-based SBA-15/PPy-X composites can be promising EMW absorbers with an excellent performance at a target frequency (typical radar channels).
机译：官能化的SBA-15由于其高度有序的介孔结构，良好的热稳定性和巨大的潜在应用而引起了相当大的兴趣。同时，如图所示，具有良好导电性的聚吡咯（PPY）也是一种非常受欢迎的吸收剂相关的候选者。在此，通过以原位化学氧化聚合方法组合通过简单的水热处理成功地合成了长杆形状SBA-15 / PPY-X复合材料。与原始SBA-15样品相比，SBA-15 / PPY-X复合材料表现出有效的吸收带（R1 <-10dB）和电磁波吸收能力，其与强介电损耗和更好的阻抗匹配的性质相关，通过用合适量的PPY物种改性，暗示增强的电介质特性。 SBA-15 / PPY-0.5复合材料的最小反射损失（RL）达到-44.7dB，具有非常低的填料负载（15wt％），对应于8.9GHz的厚度为3.5mm。此外，有效吸收带宽高达6.1 GHz（11.1-17.2 GHz）和3.8 GHz（7.4-11.2 GHz），分别厚度为2.5毫米和3.5尼尼，可以涵盖大部分KU波段（12- 18 GHz）和X波段（8-12 GHz）。结果表明，新设计的基于二氧化硅的SBA-15 / PPY-X复合材料可以是具有优异性能的EMW吸收器，其在目标频率（典型的雷达通道）处具有出色的性能。

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