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Polymers 2016, 8(11), 392; doi:10.3390/polym8110392

Preparation of Magnetic Iron Oxide Nanoparticles (MIONs) with Improved Saturation Magnetization Using Multifunctional Polymer Ligand

1,†,‡
,
1,2,†
,
1,2,* and 1
1
School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2
Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education, Key Laboratory of Green Preparation and Application for Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
These authors contributed equally to this work.
Current address: Department of Chemistry, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan.
*
Author to whom correspondence should be addressed.
Academic Editors: Joannis K. Kallitsis, Georgios Bokias and Valadoula Deimede
Received: 4 October 2016 / Revised: 30 October 2016 / Accepted: 31 October 2016 / Published: 8 November 2016
(This article belongs to the Special Issue Hybrid Polymeric Materials)
View Full-Text   |   Download PDF [3759 KB, uploaded 8 November 2016]   |  

Abstract

This paper describes the preparation of ultra-small magnetic iron oxide (Fe3O4) nanoparticles (MIONs) coated with water-soluble thioether end-functionalized polymer ligand pentaerythritol tetrakis 3-mercaptopropionate-polymethacrylic acid (PTMP-PMAA). The MIONs were prepared by co-precipitation of aqueous iron precursor solution at a high temperature. The polymer modified MIONs were characterized by dynamic light scattering (DLS), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), thermogravimetric analysis (TGA), and vibrating sample magnetometery (VSM). It was found that these MIONs were successfully modified by this water-soluble polymer ligand with a fairly uniform size and narrow size distribution. The dried powder of MIONs could be stored for a long time and re-dispersed well in water without any significant change. Additionally, the polymer concentration showed a significant effect on size and magnetic properties of the MIONs. The saturation magnetization was increased by optimizing the polymer concentration. Furthermore, the 3-(4,5-dimethylthiazol-2-yl)-2-5-diphenyltetrazolium bromide (MTT)-assay demonstrated that these MIONs were highly biocompatible and they could be successfully coupled with fluorescent dye Rhodamine due to the formation of amide bond between carboxylic acid groups of MIONs and amine groups of dye. The obtained results indicated that these multifunctional MIONs with rich surface chemistry exhibit admirable potential in biomedical applications. View Full-Text
Keywords: magnetic iron oxide nanoparticles; polymer ligand; biocompatible; multifunctional; saturation magnetization magnetic iron oxide nanoparticles; polymer ligand; biocompatible; multifunctional; saturation magnetization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Majeed, M.I.; Guo, J.; Yan, W.; Tan, B. Preparation of Magnetic Iron Oxide Nanoparticles (MIONs) with Improved Saturation Magnetization Using Multifunctional Polymer Ligand. Polymers 2016, 8, 392.

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