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Research on Preparation and Properties of Paper-based Materials for Electromagnetic Shielding with Low Reflection
Received:June 21, 2023  
DOI：10.11980/j.issn.0254-508X.2024.01.010
Key Words:carbon fiber  EMI shielding  low reflection  gradient structure  electro-thermal property
Fund Project:国家自然科学基金项目（51903142）；陕西省重点研发计划一般项目（2023-YBGY-474）；广西清洁化制浆造纸与污染控制重点实验室开放基金资助项目（KF201904）；中国博士后基金面上项目（2020M673477）。
Author NameAffiliationPostcode
WU Juan* College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
TAN Jiaojun College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021
Guangxi Key Lab of Clean Pulp & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
ZHANG Meiyun College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
CHEN Xu College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
XU Jinge College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
LI Fangfang College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
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Abstract:In this study， a series of carbon fiber papers with different conductivity were prepared by milling pretreatment and wet-forming from carbon fiber and hardwood pulp fiber. And then， these papers were laminated with epoxy film to obtain composite carbon fiber paper （MCFP） with gradient structure. The electromagnetic shielding performance， mechanical properties， and conductivity of MCFP were investigated. The results showed that the gradient and multilayer structure could significantly diminish incident electromagnetic wave reflection while enhancing the absorption of internal reflections. Consequently， the MCFP demonstrated superior electromagnetic shielding with low reflectance characteristics. The total shielding efficiency of MCFP reached 45 dB， and the absorption coefficient was up to 0.67 under optimized conditions. At the same time， the carbon fiber endowed the MCFP with excellent electro-thermal performance， and the surface temperature could reach 147 ℃ with a supplied voltage of 6 V.
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