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Preparation and Properties of Electromagnetic Wave Absorption Materials BaTiO3/MWCNT and Derived PAN Hybrid Fibers

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Author(s): BI Cheng, ZHU Mei-Fang, ZHANG Qing-Hong, LI Yao-Gang, WANG Hong-Zhi

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 25;
Issue: 8;
Start page: 829;
Date: 2010;
Original page

Keywords: multi-walled carbon nanotubes; BaTiO3 nanoparticle; electromagnetic wave absorbing-ability; PAN hybrid fiber

ABSTRACT
BaTiO3/multi-walled carbon nanotubes (MWCNTs) composite was synthesized by an efficient solvent-thermal route. Transmission electron microscope images clearly indicate that the surfaces of the MWCNTs are uniformly decorated by well-crystallized BaTiO3 particles with diameters of 15-30 nm. The result of Electromagnetic (EM) wave absorption properties analysis, determined by the EM parameters, shows that the reflection loss (RL) in the BaTiO3/MWCNT composite is higher than that occurring in pure MWCNTs or BaTiO3, which resulted from the better matched characteristic impedance and enhanced complex permeability in the high frequency. The maximum RL of –37.5 dB in the BaTiO3/MWCNT composite is obtained at a frequency of 10.4 GHz and the absorption range is under –10 dB in the frequency range of 9.6–13.1GHz with the absorber thickness of 2 mm.  BaTiO3/MWCNT/PAN hybrid fibres, derived from a PAN solution containing 10 wt% BaTiO3/MWCNT composite, were prepared by the electrospinning process. The results of XRD and SEM indicated that both the structure of  BaTiO3/MWCNT composite and the morphology of PAN changed little after the hybrid process. BaTiO3/MWCNT composite has the well compatibility with PAN matrix.
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