Study on Electromagnetic Properties of Fe3O4 Nanoparticles Dispersed in Cellulose Matrix with Core-Shell Structure

文献类型： 外文期刊

第一作者： Wang, Fei

作者： Wang, Fei;Yin, Chan;Li, Jihua;Wei, Xiaoyi;Cui, Lihong;Li, Te

作者机构：

关键词： Polymer-matrix composites (PMCs);magnetic properties;surface treatments;reflection loss

期刊名称：INTEGRATED FERROELECTRICS （ 影响因子：0.836； 五年影响因子：0.787 ）

ISSN： 1058-4587

年卷期： 2015 年 163 卷 1 期

页码：

收录情况： SCI

摘要： Fe3O4/cellulose composite, a novel microwave absorption material, was successfully synthesized by the surface-initiated free-radical polymerization. The broad absorption peak at similar to 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-organic composites, the composite showed a lowest density of 1.48 g/cm(3), 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 similar to 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.

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