Electrospun magnetic carbon composite fibers: Synthesis and electromagnetic wave absorption characteristics. Issue 6 (31st May 2012)

• Record Type: Journal Article
• Authors: Yang, Ying; Guo, Zhen; Zhang, Huan; Huang, Daqing; Gu, Jialin; Huang, Zhenghong; Kang, Feiyu; Alan Hatton, T.; Rutledge, Gregory C.
• Is Part Of: Journal of applied polymer science. Volume 127:Issue 6(2013:Mar. 15)
• Page Start: 4288
• Page End: 4295
• Publication Date: 2012-05-31
• Subjects: Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.38027
• Languages: English
• ISSNs: 0021-8995

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Electrospun polyacrylonitrile (PAN)‐based carbon composite fibers embedded with magnetic nanoparticles have been developed as materials for electromagnetic wave absorption. The nanocomposite fibers were prepared by electrospinning from a dispersion of magnetite (Fe<sub>3</sub>O<sub>4</sub>) nanoparticles stabilized by <sc>L</sc>‐glutamic acid in a solution of PAN and <italic>N, N</italic>‐dimethyl formamide. The Fe<sub>3</sub>O<sub>4</sub>‐embedded PAN nanofibers were stabilized at 270°C in air and carbonized at 800°C in nitrogen. The Fe<sub>3</sub>O<sub>4</sub> nanoparticles were crystalline with a particle size of about 7 nm, most of which was reduced to Fe<sub>3</sub>C with agglomerates of up to 50 nm diameter in the carbon fibers. The carbon morphology was mostly disordered, but exhibited a layered graphitic structure in the vicinity of the nanoparticles. The carbon composite fiber exhibited ferromagnetic behavior, and the induced magnetic saturation per unit mass of fibers increased with increasing Fe<sub>3</sub>O<sub>4</sub> content in the precursor. The complex relative dielectric permittivity was tuned by adjusting the amount of Fe<sub>3</sub>O<sub>4</sub> in the carbon fiber precursor. With increasing Fe<sub>3</sub>O<sub>4</sub> content, good electromagnetic wave absorption characteristics were observed below 6 GHz, even for samples with fiber loadings as low as 5 wt %. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013</p> </abstract>