Ferk Gregor, Krajnc Peter, Hamler Anton, Mertelj Alenka, Cebollada Federico, Drofenik Miha, Lisjak Darja
University of Maribor, Faculty of Chemistry and Chemical Engineering, 2000 Maribor, Slovenia.
University of Maribor, Faculty of Electrical Engineering and Computer Science, 2000 Maribor, Slovenia.
Sci Rep. 2015 Jun 12;5:11395. doi: 10.1038/srep11395.
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 Sc(3+), 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.
首次报道了将磁性钡铁氧体纳米颗粒掺入聚甲基丙烯酸甲酯（PMMA）的透明聚合物基质中。水热合成了掺杂Sc(3+)的钡铁氧体纳米片，即BaSc0.5Fe11.5O12（BaHF），其直径在20至130nm范围内，厚度约为5nm，并在1-丁醇中用十二烷基苯磺酸使其稳定。该方法通过将BaHF悬浮液混入液态单体中，然后进行原位本体自由基聚合，从而制备整体纳米复合材料。当BaHF纳米颗粒的负载量高达0.27wt.%时，PMMA仍保持其透明度，这意味着当在磁场中进行聚合时，可以合成具有磁各向异性和光各向异性的整体纳米复合材料。磁性纳米颗粒的优异分散性，以及在本研究中对磁性能的合理控制，对于这些材料的磁光应用而言是令人鼓舞的。
