东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (8): 133-139.DOI: 10.12068/j.issn.1005-3026.2025.20240203

• 研究论文 • 上一篇    

基于缺陷工程调控多壁碳纳米管的微波吸收性能

李逸兴1, 张璞1, 孙卓1, 张雪峰1,2   

  1. 1.东北大学 材料科学与工程学院,辽宁 沈阳 110819
    2.杭州电子科技大学 材料与环境工程学院,浙江 杭州 310012
  • 收稿日期:2024-11-04 出版日期:2025-08-15 发布日期:2025-11-24
  • 通讯作者: 李逸兴
  • 作者简介:李逸兴(1992—),男,陕西宝鸡人,东北大学副教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(52225312);国家自然科学基金资助项目(52201202);国家自然科学基金资助项目(52477021);辽宁省自然科学基金资助项目(2024-MSBA-31)

Regulating Microwave Absorption Performance of Multi-walled Carbon Nanotubes Based on Defect Engineering

Yi-xing LI1, Pu ZHANG1, Zhuo SUN1, Xue-feng ZHANG1,2   

  1. 1.School of Materials Science & Engineering,Northeastern University,Shenyang 110819,China
    2.College of Materials and Environmental Engineering,Hangzhou Dianzi University,Hangzhou 310012,China.
  • Received:2024-11-04 Online:2025-08-15 Published:2025-11-24
  • Contact: Yi-xing LI

摘要:

为了提升多壁碳纳米管(MWCNTs)的微波吸收性能,采用缺陷工程策略,通过改变硝酸浓度在MWCNTs中引入结构缺陷调控缺陷密度.结果表明,经7.32 mol/L硝酸处理的样品在13.3 GHz处的最小反射损耗达-43.8 dB,有效吸收带宽为3.3 GHz,显著优于原始样品和过度蚀刻样品,适度的缺陷密度可提升微波吸收性能,过度蚀刻会破坏石墨结构导致性能下降.这种通过单一材料缺陷调控而非传统复合材料设计的方法,不仅简化了工艺,还为微波吸收材料的性能优化提供了新思路.

关键词: 微波吸收材料, 多壁碳纳米管, 缺陷工程, 缺陷密度, 微波吸收

Abstract:

To improve the microwave absorption performance of multi-walled carbon nanotubes (MWCNTs), a defect engineering strategy was employed by introducing structural defects to modulate defect density through nitric acid treatment with varying concentrations. The results demonstrate that sample treated with 7.32 mol/L nitric acid achieves a minimum reflection loss of -43.8 dB at 13.3 GHz and an effective absorption bandwidth of 3.3 GHz, significantly outperforming both pristine and over-etched samples. Moderate defect density enhances microwave absorption performance, while excessive etching degrades the graphitic structure and deteriorates performance. This approach, based on defect modulation in a single material rather than traditional composite material design, not only simplifies the fabrication process but also provides new insights for optimizing the performance of microwave absorbing materials.

Key words: microwave absorbing material, multi-walled carbon nanotube, defect engineering, defect density, microwave absorption

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