Hierarchical porous carbon nanofibers for green electromagnetic interference shielding

被引：2

作者：

Su, Jingna ^{[1
]}

Li, Qiuyu ^{[2
]}

Tan, Wei ^{[1
]}

Jiang, Qian ^{[1
]}

Li, Lei ^{[1
]}

Ju, Jingge ^{[1
]}

机构：

[1] Tiangong Univ, Sch Text Sci & Engn, Tianjin 300387, Peoples R China

[2] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

来源：

APPLIED MATERIALS TODAY | 2025年 / 42卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Porous carbon nanofibers; Electromagnetic interference shielding; Green shielding index (g(s)); ELECTRICAL-CONDUCTIVITY; RECENT PROGRESS; COMPOSITES; THRESHOLD; FOAMS; FILM;

D O I：

10.1016/j.apmt.2024.102565

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Carbon nanofiber fillers have garnered attention in the electromagnetic shielding field. However, their excessive conductivity brings pronounced secondary reflection pollution, creating a challenge in achieving an optimal balance between high shielding effectiveness and reflectivity. In this work, hierarchical porous carbon nanofibers (HPCNFs) were prepared by electrospinning blowing (EBS) and carbonization processes. The hierarchical nanoscale porous structure was optimized by adjusting content of pore-inducing agent, facilitating the attenuation of impedance mismatch encountered by electromagnetic waves (EMWs) propagating from air to the surface of material, thus effectively reducing reflectivity. Specifically, HPCNFs achieved a total shielding effectiveness (SET) value of up to 24.99 dB, shielding 99.68 % of the EMWs. Meanwhile, the green shielding (gs) index was up to 0.942, indicating that HPCNFs were a potential green EMI shielding material. This work explored great potentials of porous structures in electromagnetic shielding field and provided new inspirations in mitigating secondary reflection pollution.

引用

页数：10

共 64 条

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