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Date of Publication:2022-10-09

Journal:Material Science and Technology

Volume:29

Issue:2

Page Number:36-43

ISSN No.:1005-0299

Key Words:"Fe_3O_4/PEK-C; composite nanofiber membrane; electrospinning; Fe_3O_4/PEK-C; electromagnetic parameter; microwave absorbing properties"

CN No.:23-1345/TB

Abstract:Electrostatic spinning technology is a novel,efficient and simple method for the preparation of continuous nanofibers.The excellent characteristics of nanocomposite fiber membranes provide new absorption channels for nanoabsorbents.In this paper,Fe_3O_4/PEK-C composite nanofiber membranes were fabricated by electrospinning technique.The surface micro-topography and thermal stability were characterized by scanning electron microscope(SEM)and thermal gravimetric analysis(TGA).The electromagnetic parameters and microwave absorption properties were measured in the frequency range of 8.2 ~ 12.4 GHz.The results indicated that the Fe_3O_4/PEK-C composite nanofiber membranes exhibited a spatial network structure formed by the interweaving of superfine fibers.The thermal stability,complex permittivity and permeability,dielectric and magnetic loss of the nanofiber membranes increased with the increasing Fe_3O_4 content.The reflection loss exceeding-5 dB was obtained in 8.2 ~ 12.4 GHz for the composite nanofiber membrane specimens with the thickness of 1.8 mm,and the bandwidth of reflection loss below-10 dB was 2 GHz.The maximum reflection loss of-15.4 dB was achieved at 8.6 GHz.Electrostatic spinning technology is a novel,efficient and simple method for the preparation of continuous nanofibers.

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