Wang F.,Agriculture Products Processing Research Institute |
Yin C.,Agriculture Products Processing Research Institute |
Li J.,Agriculture Products Processing Research Institute |
Wei X.,Agriculture Products Processing Research Institute |
And 2 more authors.
Integrated Ferroelectrics | Year: 2015
Fe3O4/cellulose composite, a novel microwave absorption material, was successfully synthesized by the surface-initiated free-radical polymerization. The broad absorption peak at ∼3000 cm-1 indicated that the Fe3O4 polymerized with nanoscale cellulose through hydrogen bonding and electrostatic interactions. Synthesized composite consists of two phases, matrix (cellulose) and substrate (Fe3O4) with a uniform distribution of Fe3O4 nanoparticles in the matrix from SEM micrographs. Compared to other inorganic-Corganic composites, the composite showed a lowest density of 1.48 g/cm3, fulfilling the requirements of an excellent electromagnetic (EM)-wave absorbing material. The permeability and permittivity of the composite using 5 wt% initiator varied remarkably at ∼17 GHz, and the reflection loss value reached -13 dB at 17 GHz. The partial demagnetization caused by the uniform dispersion of Fe3O4 nanoparticles enhanced the magnetic anisotropy of the composite, thus increasing the EM-wave absorption characteristics. The excellent physiochemical and microwave absorption properties could promote the development of EM-wave absorbing material consisting of inorganic-organic composites. © 2015 Taylor & Francis Group, LLC. Source