Polypyrrole-CoFe 2 O 4 nanocomposites: Polymer influence on magnetic behavior and particle effects on polymer conduction

Composites of cobalt ferrite nanoparticles in a polypyrrole (PPy) matrix have been synthesized in acid media and characterized by X-ray diffraction studies, scanning and transmission electron microscopy observation, thermogravimetric analysis, conductivity, and infrared spectroscopy measurements. Tw...

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Detalles Bibliográficos
Publicado:	2018
Materias:	Conducting polymers Ferrite High resolution transmission electron microscopy Infrared spectroscopy Magnetic anisotropy Magnetic materials Plastic products Polypyrroles Scanning electron microscopy Synthesis (chemical) Thermogravimetric analysis Transmission electron microscopy Cobalt ferrite nanoparticles Coercivity and remanences Ferromagnetic behaviors Magnetic parameters Positive magnetoresistance Scanning and transmission electron microscopy Spectroscopy measurements X-ray diffraction studies Magnetic bubbles
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02728397_v39_n12_p4617_MunozResta http://hdl.handle.net/20.500.12110/paper_02728397_v39_n12_p4617_MunozResta
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_02728397_v39_n12_p4617_MunozResta
record_format	dspace
spelling	paper:paper_02728397_v39_n12_p4617_MunozResta2023-06-08T15:25:25Z Polypyrrole-CoFe 2 O 4 nanocomposites: Polymer influence on magnetic behavior and particle effects on polymer conduction Conducting polymers Ferrite High resolution transmission electron microscopy Infrared spectroscopy Magnetic anisotropy Magnetic materials Plastic products Polypyrroles Scanning electron microscopy Synthesis (chemical) Thermogravimetric analysis Transmission electron microscopy Cobalt ferrite nanoparticles Coercivity and remanences Ferromagnetic behaviors Magnetic parameters Positive magnetoresistance Scanning and transmission electron microscopy Spectroscopy measurements X-ray diffraction studies Magnetic bubbles Composites of cobalt ferrite nanoparticles in a polypyrrole (PPy) matrix have been synthesized in acid media and characterized by X-ray diffraction studies, scanning and transmission electron microscopy observation, thermogravimetric analysis, conductivity, and infrared spectroscopy measurements. Two types of composites were prepared: one including dodecylbenzenesulphonic acid as a particle protector and another one without protection. The magnetic behavior was studied through DC magnetization measurements; hysteresis loops were observed, showing ferromagnetic behavior for particles and composites. Materials with particle protection showed magnetic parameters independent of the PPy/ferrite ratio; in the absence of protector, both the coercivity and remanence ratio decreased as the PPy/ferrite ratio increased. These results are attributed to conducting polymer effects on the ferrite particles, affecting the magnetic anisotropy. On the other hand, composites with low PPy/ferrite ratio showed positive magnetoresistance of up to 20% at room temperature, indicating an effect of the magnetic particles on polymer conduction. POLYM. COMPOS., 39:4617–4627, 2018. © 2017 Society of Plastics Engineers. © 2017 Society of Plastics Engineers 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02728397_v39_n12_p4617_MunozResta http://hdl.handle.net/20.500.12110/paper_02728397_v39_n12_p4617_MunozResta
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Conducting polymers Ferrite High resolution transmission electron microscopy Infrared spectroscopy Magnetic anisotropy Magnetic materials Plastic products Polypyrroles Scanning electron microscopy Synthesis (chemical) Thermogravimetric analysis Transmission electron microscopy Cobalt ferrite nanoparticles Coercivity and remanences Ferromagnetic behaviors Magnetic parameters Positive magnetoresistance Scanning and transmission electron microscopy Spectroscopy measurements X-ray diffraction studies Magnetic bubbles
spellingShingle	Conducting polymers Ferrite High resolution transmission electron microscopy Infrared spectroscopy Magnetic anisotropy Magnetic materials Plastic products Polypyrroles Scanning electron microscopy Synthesis (chemical) Thermogravimetric analysis Transmission electron microscopy Cobalt ferrite nanoparticles Coercivity and remanences Ferromagnetic behaviors Magnetic parameters Positive magnetoresistance Scanning and transmission electron microscopy Spectroscopy measurements X-ray diffraction studies Magnetic bubbles Polypyrrole-CoFe 2 O 4 nanocomposites: Polymer influence on magnetic behavior and particle effects on polymer conduction
topic_facet	Conducting polymers Ferrite High resolution transmission electron microscopy Infrared spectroscopy Magnetic anisotropy Magnetic materials Plastic products Polypyrroles Scanning electron microscopy Synthesis (chemical) Thermogravimetric analysis Transmission electron microscopy Cobalt ferrite nanoparticles Coercivity and remanences Ferromagnetic behaviors Magnetic parameters Positive magnetoresistance Scanning and transmission electron microscopy Spectroscopy measurements X-ray diffraction studies Magnetic bubbles
description	Composites of cobalt ferrite nanoparticles in a polypyrrole (PPy) matrix have been synthesized in acid media and characterized by X-ray diffraction studies, scanning and transmission electron microscopy observation, thermogravimetric analysis, conductivity, and infrared spectroscopy measurements. Two types of composites were prepared: one including dodecylbenzenesulphonic acid as a particle protector and another one without protection. The magnetic behavior was studied through DC magnetization measurements; hysteresis loops were observed, showing ferromagnetic behavior for particles and composites. Materials with particle protection showed magnetic parameters independent of the PPy/ferrite ratio; in the absence of protector, both the coercivity and remanence ratio decreased as the PPy/ferrite ratio increased. These results are attributed to conducting polymer effects on the ferrite particles, affecting the magnetic anisotropy. On the other hand, composites with low PPy/ferrite ratio showed positive magnetoresistance of up to 20% at room temperature, indicating an effect of the magnetic particles on polymer conduction. POLYM. COMPOS., 39:4617–4627, 2018. © 2017 Society of Plastics Engineers. © 2017 Society of Plastics Engineers
title	Polypyrrole-CoFe 2 O 4 nanocomposites: Polymer influence on magnetic behavior and particle effects on polymer conduction
title_short	Polypyrrole-CoFe 2 O 4 nanocomposites: Polymer influence on magnetic behavior and particle effects on polymer conduction
title_full	Polypyrrole-CoFe 2 O 4 nanocomposites: Polymer influence on magnetic behavior and particle effects on polymer conduction
title_fullStr	Polypyrrole-CoFe 2 O 4 nanocomposites: Polymer influence on magnetic behavior and particle effects on polymer conduction
title_full_unstemmed	Polypyrrole-CoFe 2 O 4 nanocomposites: Polymer influence on magnetic behavior and particle effects on polymer conduction
title_sort	polypyrrole-cofe 2 o 4 nanocomposites: polymer influence on magnetic behavior and particle effects on polymer conduction
publishDate	2018
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02728397_v39_n12_p4617_MunozResta http://hdl.handle.net/20.500.12110/paper_02728397_v39_n12_p4617_MunozResta
_version_	1768542125539983360

Polypyrrole-CoFe 2 O 4 nanocomposites: Polymer influence on magnetic behavior and particle effects on polymer conduction

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