• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Flexible high dielectric thin films based on cellulose nanofibrils and acid oxidized multi-walled carbon nanotubes
【24h】

Flexible high dielectric thin films based on cellulose nanofibrils and acid oxidized multi-walled carbon nanotubes

机译：基于纤维素纳米纤维的柔性高介电薄膜和酸氧化多壁碳纳米管

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Flexible high dielectric materials are of prime importance for advanced portable, foldable and wearable devices. A series of flexible high dielectric thin films based on cellulose nanofibrils (CNF) and acid oxidized multi-walled carbon nanotubes ( o -MWCNT) was prepared in aqueous solution. Though no organic solvent was involved during the preparation, the SEM images showed that o -MWCNTs have good distribution within the CNF matrix. The dielectric constant of CNF/ o -MWCNT (6.2 wt%) composite films was greatly increased from 25.24 for pure CNF to 73.88, while the loss tangent slightly decreased from 0.70 to 0.68, and the AC conductivity decreased from 3.15 × 10 ~(?7) S cm ~(?1) for CNF to 1.77 × 10 ~(?7) S cm ~(?1) (at 1 kHz). The abnormal decrease of loss tangent and AC conductivity were attributed to the introduction of oxide-containing groups on the surface of MWCNTs. The nanocomposite films showed excellent flexibility such that they could be bent a thousand times without visible damage. The presence of MWCNTs also helped to improve the thermal stability of the composite films. The excellent dielectric and mechanical properties of the CNF/ o -MWCNT composite film demonstrate its great potential to be utilized in the field of energy storage.
机译：灵活的高介电材料对于先进的便携式，可折叠和可穿戴设备具有最重要的重要性。在水溶液中制备基于纤维素纳米纤维（CNF）和酸氧化多壁碳纳米管（O-MWCNT）的一系列柔性高介电薄膜。虽然在制备过程中没有涉及有机溶剂，但SEM图像显示O-MWCNT在CNF基质中具有良好的分布。 CNF / O-MWCNT（6.2wt％）复合膜的介电常数从25.24大大增加到纯CNF至73.88，而损耗切线略微降低0.70至0.68，并且交流电导率从3.15×10减少（？ 7）CNF的Cm〜（α1）为1.77×10〜（？7）S cm〜（α1）（1 kHz）。损失切线和交流电导率的异常降低归因于在MWCNT表面上引入含氧化物的基团。纳米复合膜显示出优异的柔韧性，使得它们可以弯曲一千次而不损坏。 MWCNT的存在还有助于改善复合膜的热稳定性。 CNF / O-MWCNT复合膜的优异介电和机械性能证明其在能量储存领域中使用的很大潜力。

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