Magnetic epoxy nanocomposites with superparamagnetic MnFe2O4 nanoparticles
Source abstract
Abstract
Manganese iron oxide (MnFe2O4) nanoparticles successfully served as nanofillers for obtaining magnetic epoxy nanocomposites. The viscosities of MnFe2O4/epoxy resin liquid suspensions increased with increasing the nanoparticles loading except the suspension with 5.0 and 1.0 wt% loading, whose viscosities were lower than that of pure epoxy. The introduction of MnFe2O4 nanoparticles showed a lower onset decomposition temperature and glass transition temperature (Tg), which decreased with increasing the nanoparticles loading. The storage modulus and tensile strength of 1.0 wt% MnFe2O4/epoxy were a little higher than that of pure epoxy. The coercivity of MnFe2O4/epoxy nanocomposites with 5.0 wt% (44.7 Oe) and 10.0 wt% (43.9 Oe) displayed much higher than that of pure MnFe2O4 nanoparticles (14.94 Oe). The magnetic moment (m) of nanocomposites (1.354 μB for 10 wt% MnFe2O4/epoxy) are higher than that of pure MnFe2O4 nanoparticles (1.244 μB). The increased real permittivity observed in the nanocomposites was attributed to the interfacial polarization. The intrinsic permittivity of the MnFe2O4 nanoparticles was also calculated.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Electromagnetic wave absorption materials · Polymer Nanocomposites and Properties · High voltage insulation and dielectric phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
South China University of Technology 1 Laboratory of Polymer Processing Engineering of Ministry of Education, , Guangzhou, Guangdong 510640 China
Lamar University 3 Department of Chemistry and Biochemistry , Beaumont, TX 77710 USA
University of Tennessee 2 Integrated Composites Laboratory (ICL), Department of Chemical and Biomolecular Engineering, , Knoxville, TN 37996, USA
Western Digital Corporation 4 Magnetic Head Operation, , Fremont, CA 94539 USA
Yanshan University 5 State Key Laboratory of Metastable Materials Science and Technology, , Hebei, 066004, China
Funding
Fundamental Research Funds for the Central Universities of China · Guangdong Provincial National Science Foundation · National Science Foundation of China · China Postdoctoral Science Foundation · China Scholarship Council · Center for Hierarchical Manufacturing, National Science Foundation
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