Synthesis of polyethylene of glycol-coated manganese zinc ferrite and polyvinyl alcohol-coated manganese zinc ferrite nanoparticles via co-precipitation method

Ferrites are important nanomagnetic materials in chemical industry due to their high applicability in pharmaceutical and electronic devices fabrication. Amongst, manganese and zinc modified ferrite (Mn/Zn ferrite) nanocomposites have attracted intensive interest of researchers because of the relativ...

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Main Author:	Hassan Kareem, Sahira
Format:	Thesis
Language:	English
Published:	2016
Subjects:	QD Chemistry
Online Access:	http://eprints.utm.my/id/eprint/78510/1/SahiraHassanKareemPFS2016.pdf
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spelling	my-utm-ep.785102021-06-30T12:19:27Z Synthesis of polyethylene of glycol-coated manganese zinc ferrite and polyvinyl alcohol-coated manganese zinc ferrite nanoparticles via co-precipitation method 2016-03 Hassan Kareem, Sahira QD Chemistry Ferrites are important nanomagnetic materials in chemical industry due to their high applicability in pharmaceutical and electronic devices fabrication. Amongst, manganese and zinc modified ferrite (Mn/Zn ferrite) nanocomposites have attracted intensive interest of researchers because of the relatively high magnetic properties. However, the magnetic properties of the Mn/Zn ferrite materials reduce significantly due to agglomeration especially in aqueous solution. In this research, an attempt was carried out to synthesize polymer coated Mn/Zn ferrite via chemical coprecipitation in order to prevent agglomeration among the nanoparticles. A series of Mn1-xZnxFe2O4 (x = 0, 0.2, 0.4, 0.6, 0.8 and 1) were prepared at 75 oC and calcined at different temperatures (500, 600, 700 °C). X-ray diffraction (XRD) result indicated all the prepared Mn1-xZnxFe2O4 crystallized in spinel cubic structure with crystallite size ranging 4.58 – 11.01 nm. Besides, the increase of Zn amount in the ferrite structure resulted in reduction of both degree of crystallinity and crystallite size. Among the synthesized materials, Mn0.8Zn0.2Fe2O4 had the highest magnetic properties. Two types of polymers: polyethylene glycol (PEG) and polyvinyl alcohol (PVA) were used to coat Mn1-xZnxFe2O4. The spinel structure remained intact after the polymer coating. The presence of polymer on the surface of Mn1-xZnxFe2O4 ferrite was confirmed by Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). Reduction in the agglomeration was observed in the polymer coated Mn/Zn ferrites as evidenced by the field emission scanning electron microscopy (FESEM) analysis. Different precipitation temperatures (25 – 100 oC) were applied to prepare 10 wt% PEG coated Mn0.8Zn0.2Fe2O4. The XRD and FESEM results showed that both the degree of crystallinity and particle size of the materials increased with increasing of the precipitation temperature. The synthesis temperature of 75oC appeared to be the optimum temperature to produce PEG coated Mn0.8 Zn0.2Fe2O4 with the highest magnetic properties. The thermal stability of Mn0.8 Zn0.2Fe2O4 increased remarkably after coating onto 10 wt% PEG and 10 wt% PVA. Besides, it was observed that the magnetic properties of the materials increased with increasing of polymer concentration. It has been demonstrated that the magnetic properties of Mn0.8Zn0.2Fe2O4 (1.92 emu/g) increased more than 10 time after the polymer coating, where 10 wt% PVA coated Mn0.8Zn0.2Fe2O4 and 10 wt% PEG coated Mn0.8Zn0.2Fe2O4 recorded 28.99 and 20.67 emu/g, respectively. This research has shown that the magnetic property of Mn/Zn ferrite could be enhanced remarkably via polymer coating using PEG and PVA, leading to its increased magnetic susceptibility, in the medical and pharmaceutical applications. 2016-03 Thesis http://eprints.utm.my/id/eprint/78510/ http://eprints.utm.my/id/eprint/78510/1/SahiraHassanKareemPFS2016.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:97191 phd doctoral Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Hassan Kareem, Sahira Synthesis of polyethylene of glycol-coated manganese zinc ferrite and polyvinyl alcohol-coated manganese zinc ferrite nanoparticles via co-precipitation method
description	Ferrites are important nanomagnetic materials in chemical industry due to their high applicability in pharmaceutical and electronic devices fabrication. Amongst, manganese and zinc modified ferrite (Mn/Zn ferrite) nanocomposites have attracted intensive interest of researchers because of the relatively high magnetic properties. However, the magnetic properties of the Mn/Zn ferrite materials reduce significantly due to agglomeration especially in aqueous solution. In this research, an attempt was carried out to synthesize polymer coated Mn/Zn ferrite via chemical coprecipitation in order to prevent agglomeration among the nanoparticles. A series of Mn1-xZnxFe2O4 (x = 0, 0.2, 0.4, 0.6, 0.8 and 1) were prepared at 75 oC and calcined at different temperatures (500, 600, 700 °C). X-ray diffraction (XRD) result indicated all the prepared Mn1-xZnxFe2O4 crystallized in spinel cubic structure with crystallite size ranging 4.58 – 11.01 nm. Besides, the increase of Zn amount in the ferrite structure resulted in reduction of both degree of crystallinity and crystallite size. Among the synthesized materials, Mn0.8Zn0.2Fe2O4 had the highest magnetic properties. Two types of polymers: polyethylene glycol (PEG) and polyvinyl alcohol (PVA) were used to coat Mn1-xZnxFe2O4. The spinel structure remained intact after the polymer coating. The presence of polymer on the surface of Mn1-xZnxFe2O4 ferrite was confirmed by Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). Reduction in the agglomeration was observed in the polymer coated Mn/Zn ferrites as evidenced by the field emission scanning electron microscopy (FESEM) analysis. Different precipitation temperatures (25 – 100 oC) were applied to prepare 10 wt% PEG coated Mn0.8Zn0.2Fe2O4. The XRD and FESEM results showed that both the degree of crystallinity and particle size of the materials increased with increasing of the precipitation temperature. The synthesis temperature of 75oC appeared to be the optimum temperature to produce PEG coated Mn0.8 Zn0.2Fe2O4 with the highest magnetic properties. The thermal stability of Mn0.8 Zn0.2Fe2O4 increased remarkably after coating onto 10 wt% PEG and 10 wt% PVA. Besides, it was observed that the magnetic properties of the materials increased with increasing of polymer concentration. It has been demonstrated that the magnetic properties of Mn0.8Zn0.2Fe2O4 (1.92 emu/g) increased more than 10 time after the polymer coating, where 10 wt% PVA coated Mn0.8Zn0.2Fe2O4 and 10 wt% PEG coated Mn0.8Zn0.2Fe2O4 recorded 28.99 and 20.67 emu/g, respectively. This research has shown that the magnetic property of Mn/Zn ferrite could be enhanced remarkably via polymer coating using PEG and PVA, leading to its increased magnetic susceptibility, in the medical and pharmaceutical applications.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Hassan Kareem, Sahira
author_facet	Hassan Kareem, Sahira
author_sort	Hassan Kareem, Sahira
title	Synthesis of polyethylene of glycol-coated manganese zinc ferrite and polyvinyl alcohol-coated manganese zinc ferrite nanoparticles via co-precipitation method
title_short	Synthesis of polyethylene of glycol-coated manganese zinc ferrite and polyvinyl alcohol-coated manganese zinc ferrite nanoparticles via co-precipitation method
title_full	Synthesis of polyethylene of glycol-coated manganese zinc ferrite and polyvinyl alcohol-coated manganese zinc ferrite nanoparticles via co-precipitation method
title_fullStr	Synthesis of polyethylene of glycol-coated manganese zinc ferrite and polyvinyl alcohol-coated manganese zinc ferrite nanoparticles via co-precipitation method
title_full_unstemmed	Synthesis of polyethylene of glycol-coated manganese zinc ferrite and polyvinyl alcohol-coated manganese zinc ferrite nanoparticles via co-precipitation method
title_sort	synthesis of polyethylene of glycol-coated manganese zinc ferrite and polyvinyl alcohol-coated manganese zinc ferrite nanoparticles via co-precipitation method
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2016
url	http://eprints.utm.my/id/eprint/78510/1/SahiraHassanKareemPFS2016.pdf
_version_	1747818002669109248

Synthesis of polyethylene of glycol-coated manganese zinc ferrite and polyvinyl alcohol-coated manganese zinc ferrite nanoparticles via co-precipitation method

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