Related Experiment Video
Updated: May 23, 2025

Characterization of Thermal Transport in One-dimensional Solid Materials
Published on: January 26, 2014
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.
Abstract:
Intelligent electromagnetic interference (EMI) shielding materials with adjustable properties and performances are garnering significant attention due to the escalating complexity of application scenarios for electronic devices. Also, the trend of miniaturization is calling for lightweight and multifunctional materials. Here, the preparation of highly aligned carbon nanofiber film (a-CNFF) by electrospinning technology and a two-stage carbonization process is proposed, in which the pressurization strategy in the carbonization process promotes the development of highly aligned fiber network structures. The serialized anisotropic structures exhibit an impressive tunability in EMI shielding effectiveness (SE) adjustable from 23.0 to 35.6 dB for linearly polarized electromagnetic waves, and a superior specific SE value (SSE/t) of 34 000 dB cm2 g-1, with an EMI SE per unit thickness of 5791 dB cm-1. Moreover, under a low load voltage of 1.6 V, the peak temperature of the film can be tuned within a wide range of 49.2-120.6 °C. These remarkable performances achieved by simply rotating the film demonstrate adjustable functionalities of the a-CNFF, providing guidelines in the applications of aerospace, military, microelectronics, and wearable devices.
More Related Videos
08:10Precision Milling of Carbon Nanotube Forests Using Low Pressure Scanning Electron Microscopy
Published on: February 5, 2017
09:35Preparation and Evaluation of Hybrid Composites of Chemical Fuel and Multi-walled Carbon Nanotubes in the Study of Thermopower Waves
Published on: April 10, 2015
Related Concept Videos
Induced Electric Fields: Applications
Diamagnetic Shielding of Nuclei: Local Diamagnetic Current
Mechanism of heat transfer
Faraday's Law
π Electron Effects on Chemical Shift: Overview
Joule-Thomson Effect
This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...