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Craciunescu I, Chiţanu E, Codescu MM, Iacob N, Kuncser A, Kuncser V, Socoliuc V, Susan-Resiga D, Bălănean F, Ispas G, Borbáth T, Borbáth I, Turcu R, Vékás L. High performance magnetorheological fluids: very high magnetization FeCo-Fe 3O 4 nanoclusters in a ferrofluid carrier. SOFT MATTER 2022; 18:626-639. [PMID: 34931628 DOI: 10.1039/d1sm01468d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
High magnetization Fe3O4/OA-FeCo/Al2O3 nanocomposite magnetic clusters have been obtained using a modified oil-in-water miniemulsion method. These nanocomposite clusters dispersed in a ferrofluid carrier result in a magnetorheological fluid with improved characteristics. The magnetic clusters have a magnetic core consisting of a mixture of magnetite nanoparticles of about 6 nm average size, stabilized with oleic acid (Fe3O4/OA) and FeCo/Al2O3 particles of about 50 nm average size, compactly packed in the form of spherical clusters with a diameter distribution in the range 100-300 nm and a hydrophilic coating of sodium lauryl sulphate surfactant. The surface chemical composition of the Fe3O4/OA-FeCo/Al2O3 clusters investigated by XPS indicates the presence of the Co2+ and Co3+ oxidation states of cobalt and the components of Fe2+ and Fe3+ characteristic to both an enhanced oxidation state at the surface of the FeCo particles and to the presence of magnetic nanoparticles of spinel structure which are decorating the supporting FeCo. This specific decorating morphology is also indicated by TEM images. Advanced characterization of the Fe3O4/OA-FeCo/Al2O3 magnetic clusters has been performed using Mössbauer spectroscopy and magnetization measurements at various temperatures between 6 K and 200 K. The unexpected formation of Co ferrite decorating nanoparticles was supported by Mössbauer spectroscopy. The dispersion of magnetic clusters in the ferrofluid carrier highly influences the flow properties in the absence of the field (shear thinning for low and moderate shear rates) and especially in applied magnetic field, when significant magnetoviscous effect and shear thinning was observed for the whole range of shear rate values. Detailed analysis of the magnetorheological behavior of the nanocomposite magnetic clusters dispersed in a ferrofluid carrier evidence significantly higher normalized dynamic yield stress values in comparison with the magnetite nanocluster suspensions of the same mass concentration, a promising result for this new type of nanocomposite magnetorheological fluid.
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Affiliation(s)
- Izabell Craciunescu
- National Institute for R&D of Isotopic and Molecular Technologies (INCDTIM), Donat Str. 67-103, 400293 Cluj-Napoca, Romania.
| | - Elena Chiţanu
- National R&D Institute for Electrical Engineering (ICPE-CA), Bucharest, Romania
| | - Mirela M Codescu
- National R&D Institute for Electrical Engineering (ICPE-CA), Bucharest, Romania
| | - N Iacob
- National Institute for R&D of Materials Physics (INCDFM), Bucharest-Magurele, Romania
| | - A Kuncser
- National Institute for R&D of Materials Physics (INCDFM), Bucharest-Magurele, Romania
| | - V Kuncser
- National Institute for R&D of Materials Physics (INCDFM), Bucharest-Magurele, Romania
| | - V Socoliuc
- Romanian Academy - Timisoara Branch, Center for Fundamental and Advanced Technical Research (CFATR), Laboratory of Magnetic Fluids, Mihai Viteazul Ave. 24, 300223 Timisoara, Romania
- Politehnica University of Timisoara, Research Center for Complex Fluids Systems Engineering, Mihai Viteazul Ave. 1, 300222 Timisoara, Romania.
| | - Daniela Susan-Resiga
- Romanian Academy - Timisoara Branch, Center for Fundamental and Advanced Technical Research (CFATR), Laboratory of Magnetic Fluids, Mihai Viteazul Ave. 24, 300223 Timisoara, Romania
- West University of Timisoara, Faculty of Physics, Vasile Pârvan Ave. 4, Timişoara 300223, Romania
| | - Florica Bălănean
- Romanian Academy - Timisoara Branch, Center for Fundamental and Advanced Technical Research (CFATR), Laboratory of Magnetic Fluids, Mihai Viteazul Ave. 24, 300223 Timisoara, Romania
| | - G Ispas
- National Institute for R&D of Isotopic and Molecular Technologies (INCDTIM), Donat Str. 67-103, 400293 Cluj-Napoca, Romania.
| | | | - I Borbáth
- ROSEAL Co., Odorheiu-Secuiesc, Romania
| | - Rodica Turcu
- National Institute for R&D of Isotopic and Molecular Technologies (INCDTIM), Donat Str. 67-103, 400293 Cluj-Napoca, Romania.
| | - L Vékás
- Romanian Academy - Timisoara Branch, Center for Fundamental and Advanced Technical Research (CFATR), Laboratory of Magnetic Fluids, Mihai Viteazul Ave. 24, 300223 Timisoara, Romania
- Politehnica University of Timisoara, Research Center for Complex Fluids Systems Engineering, Mihai Viteazul Ave. 1, 300222 Timisoara, Romania.
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Abstract
Magnetic Soft Matter is a rapidly evolving discipline with fundamental and practical interest. This is due to the fact that its physical properties can be easily controlled through external magnetic fields. In this review paper, we revisit the most recent progress in the field (since 2010) emphasizing the rheological properties of these fascinating materials. New formulations and flow kinematics are discussed. Also, new members are integrated into the long-lived magnetorheology family and suggestions are provided for future development.
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Affiliation(s)
- Jose R Morillas
- Biocolloid and Fluid Physics Group and Excellence Research Unit 'Modeling Nature' (MNat), Department of Applied Physics, Faculty of Sciences, University of Granada, C/Fuentenueva s/n, 18071 - Granada, Spain.
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Zhao W, Pang H, Gong X. Novel Magnetorheological Plastomer Filled with NdFeB Particles: Preparation, Characterization, and Magnetic–Mechanic Coupling Properties. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b01553] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wenqiang Zhao
- CAS Key Laboratory of Mechanical
Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China
| | - Haoming Pang
- CAS Key Laboratory of Mechanical
Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China
| | - Xinglong Gong
- CAS Key Laboratory of Mechanical
Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China
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