物理化学学报

上一篇    下一篇

互穿网络调控界面载流子实现多尺度纳米碳复合材料的超宽带电磁波吸收

李俐蓉1, 张思远1, 杨旭年1, 兰笛3, 刘荣侠1, 王沛孜1, 高振国2, 付骋宇1, 张鹏飞1   

  1. 1西安工程大学纺织科学与工程学院, 陕西 西安 710064;
    2香港理工大学时装与纺织学院纳米技术中心, 香港 999077;
    3湖北汽车工业学院汽车材料学院, 湖北 十堰 442002
  • 收稿日期:2026-06-14 修回日期:2026-07-28
  • 通讯作者: 张思远, 付骋宇, 张鹏飞 E-mail:siyuan_zhang@xpu.edu.cn;fuchengyu@xpu.edu.cn;fengyunjian1981@126.com

Interfacial carrier modulation of interpenetrating network toward multiscale nanocarbon composites for ultrawideband electromagnetic wave absorption

Lirong Li1, Siyuan Zhang1, Xunian Yang1, Di Lan3, Rongxia Liu1, Peizi Wang1, Zhenguo Gao2, Chengyu Fu1, Pengfei Zhang1   

  1. 1 School of Textile Science and Engineering, Xi'an Polytechnic University, Xi'an 710064, Shaanxi Province, China;
    2 Nanotechnology Center, School of Fashion and Textiles, The Hong Kong Polytechnic University, Hong Kong 999077, China;
    3 School of Automotive Materials, Hubei University of Automotive Technology, Shiyan 442002, Hubei Province, China
  • Received:2026-06-14 Revised:2026-07-28
  • Contact: Siyuan Zhang, Chengyu Fu, Pengfei Zhang E-mail:siyuan_zhang@xpu.edu.cn;fuchengyu@xpu.edu.cn;fengyunjian1981@126.com

PDF

35

赞

补充材料

1

摘要： 开发柔性、宽带且高效的聚合物基电磁波吸收薄膜，对高频无线通信和柔性电子系统具有重要意义。本文构建了一种基于原位互穿网络的多尺度纳米碳复合薄膜，以调控界面载流子行为并实现超宽带电磁波吸收。首先将氧化石墨烯、多壁碳纳米管、Fe3O4和Ag/CuO@CuS颗粒预组装成纳米纸骨架，随后通过真空辅助浸渍引入聚二甲基硅氧烷并进行原位固化，获得原位互穿复合薄膜。制备了组成与配比相同、但填料呈离散分布的共混薄膜作为对照。结果表明，原位互穿结构在保持连续碳骨架的同时构建了高度连通的异质界面网络，有效促进界面载流子的迁移、积累和弛豫，从而协同优化导电损耗、极化损耗、磁损耗和阻抗匹配。最优样品P4-i在1.7 mm厚度下获得6.64 GHz的最大有效吸收带宽和-43.2 dB的最小反射损耗，几乎覆盖整个Ku波段。电化学阻抗谱、摩擦电输出测试和有限元模拟进一步证实，原位互穿网络能够有效降低界面电荷转移电阻，并在网络尺度上促进载流子传输并增强电磁能量耗散。本研究表明，基于互穿网络的界面载流子调控是实现柔性聚合物基复合薄膜宽带、高效电磁波吸收的有效策略。

关键词: 电磁波吸收, 互穿网络, 界面载流子调控, 异质界面, 多尺度纳米碳复合材料

Abstract: Developing flexible, broadband, and highly efficient polymer-based electromagnetic wave-absorbing films is of great significance for high-frequency wireless communication and flexible electronic systems. Herein, a multiscale nanocarbon composite film based on an in-situ interpenetrating network is constructed to regulate interfacial carrier behavior and achieve ultrawideband electromagnetic wave absorption. The in-situ interpenetrating film was fabricated by first preassembling graphene oxide, multi-walled carbon nanotubes, Fe3O4, and Ag/CuO@CuS particles into a nanopaper skeleton, followed by vacuum-assisted infiltration with polydimethylsiloxane and subsequent in-situ curing. A blended film with a discrete filler distribution but the same composition and component ratio was prepared as a control. The results demonstrate that the in-situ interpenetrating structure maintains a continuous carbon skeleton while constructing a highly connected heterointerface network, effectively promoting the migration, accumulation, and relaxation of interfacial carriers. As a result, conductive loss, polarization loss, magnetic loss, and impedance matching are simultaneously optimized. The optimal sample, P4-i, exhibits a maximum effective absorption bandwidth of 6.64 GHz and a minimum reflection loss of -43.2 dB at a thickness of 1.7 mm, covering almost the entire Ku band. Electrochemical impedance spectroscopy, triboelectric output measurements, and finite-element simulations further confirm that the in-situ interpenetrating network effectively reduces interfacial charge-transfer resistance and enhances carrier transport and energy dissipation behavior at the network scale. This study indicates that interfacial carrier regulation via an interpenetrating network is an effective strategy for achieving broadband and high-efficiency electromagnetic wave absorption in flexible polymer-based composite films.

Key words: Electromagnetic wave absorption, Interpenetrating networks, Interfacial carrier modulation, Heterointerfaces, Multiscale nanocarbon composites