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Lignin-based Electrospun Magnetic Carbon Nanofibers and Their Application for Electromagnetic Shielding
Received:October 31, 2023  
DOI：10.11980/j.issn.0254-508X.2024.02.002
Key Words:electrospinning  lignin  carbonization  carbon nanofiber  electromagnetic shielding
Fund Project:国家自然科学基金面上项目（22178206）；宜宾市科技局“揭榜挂帅”项目（2022JB011）；生物基材料与绿色造纸国家重点实验室开放基金（GZKF202025）。
Author NameAffiliationPostcode
ZHOU Bingxu College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science and Technology，Xi’an， Shaanxi Province， 710021 710021
DUAN Chao* College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science and Technology，Xi’an， Shaanxi Province， 710021
Yibin Grace Group Co.， Ltd.， Yibin， Sichuan Province， 644000
State Key Lab of Bio-based Materials and Green Papermaking， Qilu University of Technolog （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 		250353
TIAN Guodong College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science and Technology，Xi’an， Shaanxi Province， 710021 710021
ZHOU Linlin College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science and Technology，Xi’an， Shaanxi Province， 710021 710021
XIE Zengying Yibin Grace Group Co.， Ltd.， Yibin， Sichuan Province， 644000 644000
WANG Qiang* State Key Lab of Bio-based Materials and Green Papermaking， Qilu University of Technolog （Shandong Academy of Sciences）， Ji’nan， Shandong Province， 250353 250353
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Abstract:In this study， the alkali lignin （AL） and polyacrylonitrile （PAN） were used as raw materials to prepare lignin-based magnetic carbon nanofibers （FeNi@LCNF） with great electromagnetic shielding effectiveness （EMI SE）， and its preparation process consisted of pre-doping of Fe and Ni precursors， electrospinning， and carbonization processes. The results showed that when the AL dosage was 50%， the electrospun fiber was optimal. When the FeNi loading capacity was 17.3%， the as-prepared FeNi@LCNF-2 exhibited high electrical conductivity and ferromagnetism. In addition， under the catalysis of Fe and Ni elements， numerous “thorn-like” carbon nanotubes in-situ grew on the surfaces of the carbon nanofibers， which further promoted the formation of porous conductive network and heterostructure of the carbon fiber material， thus endowed high conductivity （8.11 S/cm） of FeNi@LCNF-2 and 38 dB of EMI SE in the X-band.
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