Abstract
Graphene/polylactic acid; nano-Fe3O4/polylactic acid; and graphene/nano-Fe3O4/polylactic acid composite absorbers are independently produced by fused deposition modeling technology. The effects of the content of graphene and nano-Fe3O4 on absorbing properties are investigated. After measuring the electromagnetic parameters using the waveguide method, the absorbing property is characterized according to the transmission line theory. The distribution of graphene and nano-Fe3O4 in the matrix is observed by scanning electronic microscopy (SEM). The results show that the graphene and nanometer ferroferric oxide multicomponent absorbing agent helps to form a synergistic absorbing effect. In the frequency range 8.2–18.0 GHz; the absorber has the greatest absorbing property when the content of graphene and nanosize Fe3O4 are 5 wt% and 20 wt%, respectively.
Highlights
Absorbing material is a functional material that converts electromagnetic waves into thermal energy or other forms of energy and has small reflection and transmission [1]
The substrate is divided into metal (Al and Cu), non-metal, and polymer
Zhang et al used graphene as the absorbing agent and polymethyl methacrylate as the matrix, and the graphene/polymethyl methacrylate absorber was produced by melt blending
Summary
Absorbing material is a functional material that converts electromagnetic waves into thermal energy or other forms of energy and has small reflection and transmission [1]. Absorbing material is composed of an absorbing agent and substrate; [2,3]. Zhang et al used graphene as the absorbing agent and polymethyl methacrylate as the matrix, and the graphene/polymethyl methacrylate absorber was produced by melt blending. The results showed that when the volume fraction of graphene was 1.8 vol%, the graphene formed a conductive network in the polymethyl methacrylate matrix, the shielding efficiency of electromagnetic interference was 13 to 19 dB, in the frequency range 8–12 GHz [4]. The test results showed that, when the thickness was 1 to
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