Abstract
Fe3O4 nanoparticles were prepared by the chemical by using Triton X-100 as dispersant. Hollow polyacrylonitrile (PAN)/Fe3O4 magnetic composite nanofibres were fabricated through coaxial electrospinning and post-treatment. The effect of sheath feed rate on the formation of hollow structure was investigated and hollow structures of composite nanofibres were characterised by using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Fe3O4 nanoparticles existed in composite nanofibres was proved by X-ray diffraction (XRD). The magnetic properties and microwave absorbing properties of hollow composite nanofibres were respectively characterised through superconducting quantum interference device (SQUID) and vector network analyser. The study revealed that the magnetic properties of hollow composite nanofibres were closely related to the contents of Fe3O4 nanoparticles. The microwave absorbing properties of hollow PAN/Fe3O4 composite nanofibres were better than those of solid PAN/Fe3O4 composite nanofibres.
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