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Rheological, Microstructural and Thermal Properties of Magnetic Poly(Ethylene Oxide)/Iron Oxide Nanocomposite Hydrogels Synthesized Using a One-Step Gamma-Irradiation Method

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Radiation Chemistry and Dosimetry Laboratory, Division of Materials Chemistry, Ruđer Bošković Institute, Bijenička Cesta 54, 10000 Zagreb, Croatia
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Laboratory for Supramolecular Chemistry, Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička Cesta 54, 10000 Zagreb, Croatia
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Laboratory for Molecular Physics and Synthesis of New Materials, Division of Materials Physics, Ruđer Bošković Institute, Bijenička Cesta 54, 10000 Zagreb, Croatia
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Institut des Molécules et Matériaux du Mans (IMMM UMR CNRS 6283), Le Mans Université, Avenue Olivier Messiaen, F-72085 Le Mans CEDEX 9, France
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Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(9), 1823; https://doi.org/10.3390/nano10091823
Received: 31 July 2020 / Revised: 2 September 2020 / Accepted: 10 September 2020 / Published: 12 September 2020
(This article belongs to the Section Nanocomposite Materials)
Magnetic polymer gels are a new promising class of nanocomposite gels. In this work, magnetic PEO/iron oxide nanocomposite hydrogels were synthesized using the one-step γ-irradiation method starting from poly(ethylene oxide) (PEO) and iron(III) precursor alkaline aqueous suspensions followed by simultaneous crosslinking of PEO chains and reduction of Fe(III) precursor. γ-irradiation dose and concentrations of Fe3+, 2-propanol and PEO in the initial suspensions were varied and optimized. With 2-propanol and at high doses magnetic gels with embedded magnetite nanoparticles were obtained, as confirmed by XRD, SEM and Mössbauer spectrometry. The quantitative determination of γ-irradiation generated Fe2+ was performed using the 1,10-phenanthroline method. The maximal Fe2+ molar fraction of 0.55 was achieved at 300 kGy, pH = 12 and initial 5% of Fe3+. The DSC and rheological measurements confirmed the formation of a well-structured network. The thermal and rheological properties of gels depended on the dose, PEO concentration and initial Fe3+ content (amount of nanoparticles synthesized inside gels). More amorphous and stronger gels were formed at higher dose and higher nanoparticle content. The properties of synthesized gels were determined by the presence of magnetic iron oxide nanoparticles, which acted as reinforcing agents and additional crosslinkers of PEO chains thus facilitating the one-step gel formation. View Full-Text
Keywords: magnetic hydrogel; gamma-irradiation; poly(ethylene oxide); magnetite; rheological properties; thermal properties; 57Fe Mössbauer spectrometry; XRD; SEM; Fe(II) determination magnetic hydrogel; gamma-irradiation; poly(ethylene oxide); magnetite; rheological properties; thermal properties; 57Fe Mössbauer spectrometry; XRD; SEM; Fe(II) determination
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MDPI and ACS Style

Marić, I.; Šijaković Vujičić, N.; Pustak, A.; Gotić, M.; Štefanić, G.; Grenèche, J.-M.; Dražić, G.; Jurkin, T. Rheological, Microstructural and Thermal Properties of Magnetic Poly(Ethylene Oxide)/Iron Oxide Nanocomposite Hydrogels Synthesized Using a One-Step Gamma-Irradiation Method. Nanomaterials 2020, 10, 1823. https://doi.org/10.3390/nano10091823

AMA Style

Marić I, Šijaković Vujičić N, Pustak A, Gotić M, Štefanić G, Grenèche J-M, Dražić G, Jurkin T. Rheological, Microstructural and Thermal Properties of Magnetic Poly(Ethylene Oxide)/Iron Oxide Nanocomposite Hydrogels Synthesized Using a One-Step Gamma-Irradiation Method. Nanomaterials. 2020; 10(9):1823. https://doi.org/10.3390/nano10091823

Chicago/Turabian Style

Marić, Ivan; Šijaković Vujičić, Nataša; Pustak, Anđela; Gotić, Marijan; Štefanić, Goran; Grenèche, Jean-Marc; Dražić, Goran; Jurkin, Tanja. 2020. "Rheological, Microstructural and Thermal Properties of Magnetic Poly(Ethylene Oxide)/Iron Oxide Nanocomposite Hydrogels Synthesized Using a One-Step Gamma-Irradiation Method" Nanomaterials 10, no. 9: 1823. https://doi.org/10.3390/nano10091823

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