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Monolithic magneto-optical nanocomposites of barium hexaferrite platelets in PMMAGregor Ferk,
Peter Krajnc,
Anton Hamler,
Alenka Mertelj,
Federico Cebollada,
Mihael Drofenik,
Darja Lisjak, 2015, izvirni znanstveni članek
Opis: The incorporation of magnetic barium hexaferrite nanoparticles in a transparent polymer matrix of poly(methyl methacrylate) (PMMA) is reported for the first time. The barium hexaferrite nanoplatelets doped with Sc3+, i.e., BaSc0.5Fe11.5O12 (BaHF), having diameters in the range 20 to 130 nm and thicknesses of approximately 5 nm, are synthesized hydrothermally and stabilized in 1-butanol with dodecylbenzenesulfonic acid. This method enables the preparation of monolithic nanocomposites by admixing the BaHF suspension into a liquid monomer, followed by in-situ, bulk free-radical polymerization. The PMMA retains its transparency for loadings of BaHF nanoparticles up to 0.27 wt.%, meaning that magnetically and optically anisotropic, monolithic nanocomposites can be synthesized when the polymerization is carried out in a magnetic field. The excellent dispersion of the magnetic nanoparticles, coupled with a reasonable control over the magnetic properties achieved in this investigation, is encouraging for the magneto-optical applications of these materials.
Ključne besede: polymer composites, nanoparticles, polymethyl methacrylate, PMMA
Objavljeno v DKUM: 23.06.2017; Ogledov: 1638; Prenosov: 450
Celotno besedilo (1,10 MB)
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