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Pressure-Assisted Anisotropy in Carbon Nanofiber Films for Smart Electromagnetic Interference Shielding and Joule
Hao Feng1, Xin Zhao2, Wei Qian2
1School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|March 7, 2025
Summary
Researchers developed adjustable electromagnetic interference (EMI) shielding materials using aligned carbon nanofiber films (a-CNFF). These lightweight, multifunctional films offer tunable shielding effectiveness and thermal management for advanced electronic applications.
Area of Science:
- Materials Science
- Nanotechnology
- Electromagnetics
Background:
- Growing demand for lightweight, multifunctional materials for miniaturized electronic devices.
- Need for intelligent electromagnetic interference (EMI) shielding with adjustable properties.
Purpose of the Study:
- To prepare highly aligned carbon nanofiber film (a-CNFF) with tunable EMI shielding and thermal properties.
- To investigate the effect of a pressurization strategy during carbonization on material structure and performance.
Main Methods:
- Electrospinning technology for fabricating a-CNFF.
- Two-stage carbonization process with a pressurization strategy.
- Characterization of anisotropic structures and EMI shielding effectiveness (SE).
Main Results:
- Achieved tunable EMI SE from 23.0 to 35.6 dB for linearly polarized waves.
- Demonstrated superior specific SE (SSE/t) of 34,000 dB cm²/g and SE per unit thickness of 5791 dB cm⁻¹.
- Exhibited tunable peak temperature (49.2–120.6 °C) under 1.6 V load, adjustable by film rotation.
Conclusions:
- The proposed a-CNFF exhibits remarkable, adjustable EMI shielding and thermal management capabilities.
- The simple rotation of the film allows for tunable functionalities, offering versatile applications.
- Provides guidelines for using a-CNFF in aerospace, military, microelectronics, and wearable devices.
Keywords:
alignment controlcarbon nanofiberselectromagnetic interference shieldingelectrospinningjoule heatingMore Related Videos
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