Preparation and Properties of Electromagnetic Wave Absorption Materials BaTiO_3/MWCNT and Derived PAN Hybrid Fibers

BaTiO_3/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 BaTiO_3 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 BaTiO_3/MWCNT composite is higher than that occurring in pure MWCNTs or BaTiO_3,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 BaTiO_3/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. BaTiO_3/MWCNT/PAN hybrid fibres,derived from a PAN solution containing 10 wt%BaTiO_3/MWCNT composite, were prepared by the electrospinning process.The results of XRD and SEM indicated that both the structure of BaTiO_3/MWCNT composite and the morphology of PAN changed little after the hybrid process.BaTiO_3/MWCNT composite has the well compatibility with PAN matrix.