Magnetic and elastic anisotropy in magnetorheological elastomers using nickel-based nanoparticles and nanochains

Nickel (Ni) based nanoparticles and nanochains were incorporated as fillers in polydimethylsiloxane (PDMS) elastomers and then these mixtures were thermally cured in the presence of a uniform magnetic field. In this way, macroscopically structured-anisotropic PDMS-Ni based magnetorheological composi...

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Autores principales:	Antonel, Paula Soledad, Ruiz, Mariano Manuel, Pérez, Oscar E., Jorge, Guillermo Antonio, Negri, Ricardo Martin
Publicado:	2013
Materias:	Applied magnetic fields Ferromagnetic resonance (FMR) Magneto-rheological elastomers Magnetorheological composites Magnetorheological materials Polydimethylsiloxane PDMS Polydisperse hard spheres Small angle X-ray scattering Aspect ratio Atmospheric pressure Curing Elastomers Experiments Ferromagnetic resonance Magnetic anisotropy Magnetic fields Microchannels Nanomagnetics Nanoparticles Needles Nickel Scanning electron microscopy Silicones Size distribution Stress analysis Synthesis (chemical) Transmission electron microscopy X ray powder diffraction Fillers
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218979_v114_n21_p_Landa http://hdl.handle.net/20.500.12110/paper_00218979_v114_n21_p_Landa
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00218979_v114_n21_p_Landa
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spelling	paper:paper_00218979_v114_n21_p_Landa2023-06-08T14:42:51Z Magnetic and elastic anisotropy in magnetorheological elastomers using nickel-based nanoparticles and nanochains Antonel, Paula Soledad Ruiz, Mariano Manuel Pérez, Oscar E. Jorge, Guillermo Antonio Negri, Ricardo Martin Applied magnetic fields Ferromagnetic resonance (FMR) Magneto-rheological elastomers Magnetorheological composites Magnetorheological materials Polydimethylsiloxane PDMS Polydisperse hard spheres Small angle X-ray scattering Aspect ratio Atmospheric pressure Curing Elastomers Experiments Ferromagnetic resonance Magnetic anisotropy Magnetic fields Microchannels Nanomagnetics Nanoparticles Needles Nickel Scanning electron microscopy Silicones Size distribution Stress analysis Synthesis (chemical) Transmission electron microscopy X ray powder diffraction Fillers Nickel (Ni) based nanoparticles and nanochains were incorporated as fillers in polydimethylsiloxane (PDMS) elastomers and then these mixtures were thermally cured in the presence of a uniform magnetic field. In this way, macroscopically structured-anisotropic PDMS-Ni based magnetorheological composites were obtained with the formation of pseudo-chains-like structures (referred as needles) oriented in the direction of the applied magnetic field when curing. Nanoparticles were synthesized at room temperature, under air ambient atmosphere (open air, atmospheric pressure) and then calcined at 400°C (in air atmosphere also). The size distribution was obtained by fitting Small Angle X-ray Scattering (SAXS) experiments with a polydisperse hard spheres model and a Schulz-Zimm distribution, obtaining a size distribution centered at (10.0 ± 0.6) nm with polydispersivity given by σ = (8.0 ± 0.2) nm. The SAXS, X-ray powder diffraction, and Transmission Electron Microscope (TEM) experiments are consistent with single crystal nanoparticles of spherical shape (average particle diameter obtained by TEM: (12 ± 1) nm). Nickel-based nanochains (average diameter: 360 nm; average length: 3 μm, obtained by Scanning Electron Microscopy; aspect ratio = length/diameter ∼ 10) were obtained at 85°C and ambient atmosphere (open air, atmospheric pressure). The magnetic properties of Ni-based nanoparticles and nanochains at room temperature are compared and discussed in terms of surface and size effects. Both Ni-based nanoparticles and nanochains were used as fillers for obtaining the PDMS structured magnetorheological composites, observing the presence of oriented needles. Magnetization curves, ferromagnetic resonance (FMR) spectra, and strain-stress curves of low filler's loading composites (2% w/w of fillers) were determined as functions of the relative orientation with respect to the needles. The results indicate that even at low loadings it is possible to obtain magnetorheological composites with anisotropic properties, with larger anisotropy when using nanochains. For instance, the magnetic remanence, the FMR field, and the elastic response to compression are higher when measured parallel to the needles (about 30% with nanochains as fillers). Analogously, the elastic response is also anisotropic, with larger anisotropy when using nanochains as fillers. Therefore, all experiments performed confirm the high potential of nickel nanochains to induce anisotropic effects in magnetorheological materials. © 2013 AIP Publishing LLC. Fil:Soledad Antonel, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ruiz, M.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Perez, O.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Jorge, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Negri, R.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218979_v114_n21_p_Landa http://hdl.handle.net/20.500.12110/paper_00218979_v114_n21_p_Landa
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Applied magnetic fields Ferromagnetic resonance (FMR) Magneto-rheological elastomers Magnetorheological composites Magnetorheological materials Polydimethylsiloxane PDMS Polydisperse hard spheres Small angle X-ray scattering Aspect ratio Atmospheric pressure Curing Elastomers Experiments Ferromagnetic resonance Magnetic anisotropy Magnetic fields Microchannels Nanomagnetics Nanoparticles Needles Nickel Scanning electron microscopy Silicones Size distribution Stress analysis Synthesis (chemical) Transmission electron microscopy X ray powder diffraction Fillers
spellingShingle	Applied magnetic fields Ferromagnetic resonance (FMR) Magneto-rheological elastomers Magnetorheological composites Magnetorheological materials Polydimethylsiloxane PDMS Polydisperse hard spheres Small angle X-ray scattering Aspect ratio Atmospheric pressure Curing Elastomers Experiments Ferromagnetic resonance Magnetic anisotropy Magnetic fields Microchannels Nanomagnetics Nanoparticles Needles Nickel Scanning electron microscopy Silicones Size distribution Stress analysis Synthesis (chemical) Transmission electron microscopy X ray powder diffraction Fillers Antonel, Paula Soledad Ruiz, Mariano Manuel Pérez, Oscar E. Jorge, Guillermo Antonio Negri, Ricardo Martin Magnetic and elastic anisotropy in magnetorheological elastomers using nickel-based nanoparticles and nanochains
topic_facet	Applied magnetic fields Ferromagnetic resonance (FMR) Magneto-rheological elastomers Magnetorheological composites Magnetorheological materials Polydimethylsiloxane PDMS Polydisperse hard spheres Small angle X-ray scattering Aspect ratio Atmospheric pressure Curing Elastomers Experiments Ferromagnetic resonance Magnetic anisotropy Magnetic fields Microchannels Nanomagnetics Nanoparticles Needles Nickel Scanning electron microscopy Silicones Size distribution Stress analysis Synthesis (chemical) Transmission electron microscopy X ray powder diffraction Fillers
description	Nickel (Ni) based nanoparticles and nanochains were incorporated as fillers in polydimethylsiloxane (PDMS) elastomers and then these mixtures were thermally cured in the presence of a uniform magnetic field. In this way, macroscopically structured-anisotropic PDMS-Ni based magnetorheological composites were obtained with the formation of pseudo-chains-like structures (referred as needles) oriented in the direction of the applied magnetic field when curing. Nanoparticles were synthesized at room temperature, under air ambient atmosphere (open air, atmospheric pressure) and then calcined at 400°C (in air atmosphere also). The size distribution was obtained by fitting Small Angle X-ray Scattering (SAXS) experiments with a polydisperse hard spheres model and a Schulz-Zimm distribution, obtaining a size distribution centered at (10.0 ± 0.6) nm with polydispersivity given by σ = (8.0 ± 0.2) nm. The SAXS, X-ray powder diffraction, and Transmission Electron Microscope (TEM) experiments are consistent with single crystal nanoparticles of spherical shape (average particle diameter obtained by TEM: (12 ± 1) nm). Nickel-based nanochains (average diameter: 360 nm; average length: 3 μm, obtained by Scanning Electron Microscopy; aspect ratio = length/diameter ∼ 10) were obtained at 85°C and ambient atmosphere (open air, atmospheric pressure). The magnetic properties of Ni-based nanoparticles and nanochains at room temperature are compared and discussed in terms of surface and size effects. Both Ni-based nanoparticles and nanochains were used as fillers for obtaining the PDMS structured magnetorheological composites, observing the presence of oriented needles. Magnetization curves, ferromagnetic resonance (FMR) spectra, and strain-stress curves of low filler's loading composites (2% w/w of fillers) were determined as functions of the relative orientation with respect to the needles. The results indicate that even at low loadings it is possible to obtain magnetorheological composites with anisotropic properties, with larger anisotropy when using nanochains. For instance, the magnetic remanence, the FMR field, and the elastic response to compression are higher when measured parallel to the needles (about 30% with nanochains as fillers). Analogously, the elastic response is also anisotropic, with larger anisotropy when using nanochains as fillers. Therefore, all experiments performed confirm the high potential of nickel nanochains to induce anisotropic effects in magnetorheological materials. © 2013 AIP Publishing LLC.
author	Antonel, Paula Soledad Ruiz, Mariano Manuel Pérez, Oscar E. Jorge, Guillermo Antonio Negri, Ricardo Martin
author_facet	Antonel, Paula Soledad Ruiz, Mariano Manuel Pérez, Oscar E. Jorge, Guillermo Antonio Negri, Ricardo Martin
author_sort	Antonel, Paula Soledad
title	Magnetic and elastic anisotropy in magnetorheological elastomers using nickel-based nanoparticles and nanochains
title_short	Magnetic and elastic anisotropy in magnetorheological elastomers using nickel-based nanoparticles and nanochains
title_full	Magnetic and elastic anisotropy in magnetorheological elastomers using nickel-based nanoparticles and nanochains
title_fullStr	Magnetic and elastic anisotropy in magnetorheological elastomers using nickel-based nanoparticles and nanochains
title_full_unstemmed	Magnetic and elastic anisotropy in magnetorheological elastomers using nickel-based nanoparticles and nanochains
title_sort	magnetic and elastic anisotropy in magnetorheological elastomers using nickel-based nanoparticles and nanochains
publishDate	2013
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218979_v114_n21_p_Landa http://hdl.handle.net/20.500.12110/paper_00218979_v114_n21_p_Landa
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Magnetic and elastic anisotropy in magnetorheological elastomers using nickel-based nanoparticles and nanochains

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