当前位置：
X-MOL 学术
›
Adv. Electron. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Lightweight and Flexible Cotton Aerogel Composites for Electromagnetic Absorption and Shielding Applications
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2019-11-18 , DOI: 10.1002/aelm.201900796 Yan Cheng 1 , Huanqin Zhao 1 , Hualiang Lv 1 , Tengfei Shi 2 , Guangbin Ji 1 , Yanglong Hou 2
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2019-11-18 , DOI: 10.1002/aelm.201900796 Yan Cheng 1 , Huanqin Zhao 1 , Hualiang Lv 1 , Tengfei Shi 2 , Guangbin Ji 1 , Yanglong Hou 2
Affiliation
|
Currently, a versatile route is urgently required to achieve excellent electromagnetic wave (EMW) absorption and shielding functions simultaneously. A lightweight, flexible and sustainable 3D framework aerogel is designed to reach this goal, which is assembled by unique “1D‐1D” combination, nanoscale carbon nanotubes (CNTs) grown on microscale carbon fiber. EM absorption requires appropriate conductivity of filler to acquire moderate permittivity. On the contrary, EM shielding requires great conductivity to reflect most of the incident EMW. Based on this design concept, the change of electric conductivity of as‐obtained samples through in situ regulation of the growth state of CNTs is successfully controlled. When the CNTs are short and curly, the optimized conductivity favors excellent microwave absorption with wide absorption bandwidth of 5.08 GHz at only 1.6 mm. When the CNTs are long and straight, the increased conductivity is clearly boosted with 29.8 dB EM shielding effectiveness. This elaborate architecture and controlled CNT growth allow the designed 3D framework aerogel to be applied in both EM wave absorption and shielding. This conductivity tunable route gives inspiration for fabricating other efficient EM absorption and shielding devices.
中文翻译：
用于电磁吸收和屏蔽应用的轻质柔性棉气凝胶复合材料
当前，迫切需要一条通用的途径来同时实现出色的电磁波（EMW）吸收和屏蔽功能。为了实现此目标，设计了轻巧，灵活且可持续的3D框架气凝胶，该气凝胶由独特的“ 1D-1D”组合，在微米级碳纤维上生长的纳米级碳纳米管（CNT）组装而成。EM吸收要求填料具有适当的电导率才能获得适度的介电常数。相反，EM屏蔽需要很高的电导率才能反射大多数入射的EMW。基于此设计理念，通过原位调节CNT的生长状态，可以成功控制所获得样品的电导率变化。当CNT短而卷曲时，优化的电导率有利于出色的微波吸收，吸收带宽为5。08 GHz仅1.6毫米。当CNT长而笔直时，通过29.8 dB的EM屏蔽效果明显提高了电导率。这种精致的架构和可控的CNT生长使设计的3D框架气凝胶可应用于EM波吸收和屏蔽。此电导率可调路线为制造其他有效的EM吸收和屏蔽设备提供了灵感。
更新日期：2020-01-13
中文翻译：
用于电磁吸收和屏蔽应用的轻质柔性棉气凝胶复合材料
当前，迫切需要一条通用的途径来同时实现出色的电磁波（EMW）吸收和屏蔽功能。为了实现此目标，设计了轻巧，灵活且可持续的3D框架气凝胶，该气凝胶由独特的“ 1D-1D”组合，在微米级碳纤维上生长的纳米级碳纳米管（CNT）组装而成。EM吸收要求填料具有适当的电导率才能获得适度的介电常数。相反，EM屏蔽需要很高的电导率才能反射大多数入射的EMW。基于此设计理念，通过原位调节CNT的生长状态，可以成功控制所获得样品的电导率变化。当CNT短而卷曲时，优化的电导率有利于出色的微波吸收，吸收带宽为5。08 GHz仅1.6毫米。当CNT长而笔直时，通过29.8 dB的EM屏蔽效果明显提高了电导率。这种精致的架构和可控的CNT生长使设计的3D框架气凝胶可应用于EM波吸收和屏蔽。此电导率可调路线为制造其他有效的EM吸收和屏蔽设备提供了灵感。
京公网安备 11010802027423号