Lignin-based Electrospun Magnetic Carbon Nanofibers and Their Application for Electromagnetic Shielding
In this study,the alkali lignin(AL)and polyacrylonitrile(PAN)were used as raw materials to prepare lignin-based magnetic car-bon 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 conduc-tivity 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 fi-ber material,thus endowed high conductivity(8.11 S/cm)of FeNi@LCNF-2 and 38 dB of EMI SE in the X-band.
万方数据
维普
