Soft magnetic composites of carbon fibers decorated with magnetite in an epoxy matrix

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ABSTRACT

The chemical precipitation was used to obtain carbon fibers (CF) with surface modified by magnetite particles (Fe₃O₄). Processing was carried out by employing up to three subsequent coating stages of ultrasonic treatments. After each sonication stage, the coating was 17, 33, and 47 wt. % of the total weight of the modified fibers. Raman spectroscopy indicates the presence in the coating of a mixture of iron II and III states. As-decorated fibers were used to fabricate composites with an epoxy resin (ED-20) matrix cured with PEPA. The quantity of the carbon fiber filler was of 1, 3, and 6 wt %. At room temperature, the saturation magnetization of the soft magnetic samples was 0.37, 0.83, and 1.72 emu/g for the indicated compositions. Carbon fiber reinforced polymer materials with extra functions such as magnetic in this case, are expected to be useful in applications from the power and energy industries.

KEYWORDS:

• Carbon fiber reinforced resin materials
• iron oxide
• magnetic properties
• sonication
• precipitation

Acknowledgments

The work was carried out using the equipment of The Core Facilities Center “Research of materials and matter” at the PFRC UB RAS. P.B. acknowledges UEFISCDI, the projects PN030101 (21N/2019) and 5PTE/2020 – BIOTEHKER, Romania.

Disclosure Statement

No potential conflict of interest was reported by the author(s).

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

The reported study was funded by RFBR and Perm Territory as part of a scientific project [no. 19-43- 590024]; Unitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si Inovarii [5PTE/2020, PN030101 (21N/2019)].