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Ferromagnetism

Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...

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Inducing Magnetic Properties with Ferrite Nanoparticles in Resins for Additive Manufacturing.

Rocío Redón¹, Miriam D Aviles-Avila¹, Leopoldo Ruiz-Huerta^1,2

¹Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Cd. Universitaria, Coyoacán, Mexico City 04510, Mexico.

International Journal of Molecular Sciences

|July 29, 2023

Summary

Additive manufacturing successfully incorporates magnetic nanoparticles into 3D printed parts using photopolymerization. This process preserves the magnetic properties of cobalt ferrite and barium ferrite nanoparticles in the final product.

Keywords:

VAT photopolymerization additive manufacturing barium ferrite cobalt ferrite magnetic nanoparticles

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Area of Science:

Materials Science
Nanotechnology
Additive Manufacturing

Background:

Additive manufacturing offers novel ways to create complex nanostructured parts.
Magnetic nanoparticles (NPs) can impart unique properties to materials.
Tank photopolymerization is an additive process that can be expanded with functional materials.

Purpose of the Study:

To investigate the incorporation of magnetic ferrite nanoparticles into resins for 3D printing.
To assess the impact of photopolymerization on the magnetic properties and structure of nanoparticles.
To achieve 3D-printed parts with retained magnetic functionalities.

Main Methods:

Cobalt ferrite (CoFe2O4) and barium ferrite (BaFe12O19) nanoparticles were synthesized via hydroxide precipitation.
Nanoparticles were dispersed in commercial resins using mechanochemical reactions.
Photopolymerization was performed at low nanoparticle concentrations, followed by Raman spectroscopy and electron paramagnetic resonance (EPR) analysis.

Main Results:

Raman spectroscopy confirmed the presence of magnetic nanoparticles without chemical alteration.
EPR results indicated that magnetic properties were preserved throughout the photopolymerization process.
Successful 3D printing of parts with retained superparamagnetic behavior of ferrite nanoparticles was achieved.

Conclusions:

Photopolymerization is a viable method for creating 3D-printed magnetic nanocomposites.
The structure and superparamagnetic properties of ferrite nanoparticles remain unaffected by the photopolymerization process.
This technique enables the successful transfer of magnetic properties to 3D-printed objects.