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论文类型：期刊论文

发表时间：2017-04-25

发表刊物：JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY

收录刊物：SCIE、EI

卷号：48

页面范围：142-150

ISSN号：1226-086X

关键字：Manganese ferrite; Graphene oxide; Magnetorheological fluid; Sedimentation stability

摘要：Novel nanocomposites consisting of manganese ferrite nanoparticles and graphene oxide nanosheets (MnFe2O4/GO) have been synthesized as a promising candidate for magnetorheological (MR) fluid. The morphology, microstructure, composition and magnetic properties of the obtained MnFe2O4/GO were studied in detail. It was found that the MnFe2O4 nanoparticles with diameter of 8-12 nm were densely decorated on the surface of GO nanosheets. The magnetization investigation revealed that as-prepared MnFe2O4/GO had superparamagnetic behavior with saturation magnetization of 36.2 emu/g. The MR fluid was prepared by the obtained MnFe2O4/GO and the corresponding MR properties were investigated using a Physica MCR301 rheometer fitted with a magneto-rheological module. The MnFe2O4/GO-based MR fluid exhibited typical MR effect with increasing shear stress, yield stress and dynamic shear modulus depending on magnetic fields. More importantly, the sedimentation stability of the prepared MR fluid was found to be improved due to the unique sheet-like structure and the reduced density mismatch between the dispersed particles and the carrier medium. The MnFe2O4/GO-based fluid with typical MR effect and excellent sedimentation stability would provide a feasible candidate for practical applications. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.