Formation of stable magnetic nanoparticles by pyrolysis of metal containing polymers

Sówka, E.; Leonowicz, M.; Pomogailo, J.A.D.; Джардималиева, Г. И.; Kaźmierczak, J.; Ślawska‐Waniewska, A.; Kopcewicz, M.

doi:10.1016/j.jmmm.2007.03.083

Cited by 7 publications

(8 citation statements)

References 3 publications

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“…The simplest, cheapest and most environmentally friendly procedure is based on the co‐precipitation method, which involves the simultaneous precipitation of Fe 2+ and Fe 3+ ions in basic aqueous media . Among the methods ensuring stabilization and conservation of physicochemical properties is synthesis in a polymer matrix . It is well established that the stability of magnetite nanoparticles is affected by the pH of the solution and the type of stabilizing agent around the magnetite nanoparticles .…”

Section: Resultsmentioning

confidence: 99%

“…Among the methods ensuring stabilization and conservation of physicochemical properties is synthesis in a polymer matrix . It is well established that the stability of magnetite nanoparticles is affected by the pH of the solution and the type of stabilizing agent around the magnetite nanoparticles . In this respect, the first stage towards the creation of magnetite nanoparticles is based on the preparation and characterization of dispersed magnetic nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

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Characterization of stabilized porous magnetite core-shell nanogel composites based on crosslinked acrylamide/sodium acrylate copolymers

et al. 2013

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Stabilized and dispersed superparamagnetic porous nanogels based on sodium acrylate (AA‐Na) and acrylamide (AM) in a surfactant‐free aqueous system were synthesized via solution polymerization at room temperature. The formation of magnetite nanoparticles was confirmed and their properties characterized using Fourier transform infrared spectroscopy. Extensive characterization of the magnetic polymer particles using transmission electron microscopy (TEM), dynamic light scattering and zeta potential measurements revealed that Fe3O4 nanoparticles were incorporated into the shells of poly(AM/AA‐Na). The average particle size was 5–8 nm as determined from TEM. AM/AA‐Na nanoparticles with a diameter of about 11 nm were effectively assembled onto the negatively charged surface of the as‐synthesized Fe3O4 nanoparticles via electrostatic interaction. Crosslinked magnetite nanocomposites were prepared by in situ development of surface‐modified magnetite nanoparticles in an AM/AA‐Na hydrogel. Scanning electron microscopy was used to study the surface morphology of the prepared composites. The morphology, phase composition and crystallinity of the prepared nanocomposites were characterized. Atomic force microscopy and argon adsorption–desorption measurements of Fe3O4.AM/AA indicated that the architecture of the polymer network can be a hollow porous sphere or a solid phase, depending on the AA‐Na content. © 2013 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Characterization of stabilized porous magnetite core-shell nanogel composites based on crosslinked acrylamide/sodium acrylate copolymers

et al. 2013

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“…The zero-field-cooled (ZFC) and field-cooled (FC) magnetization versus temperature curves for thermolysis product of FeAAm were taken in the fields 0.002 T and 0.6 T [87]. The curve recorded in the lower field shows the FC and ZFC magnetizations decreasing and increasing, respectively.…”

Section: The Magnetic Properties Of the Metallopolymer Nanocompositesmentioning

confidence: 99%

Magnetic Metallopolymer Nanocomposites: Preparation and Properties

Джардималиева

Pomogailo

Rozenberg

et al. 2009

Magnetic Nanoparticles

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IntroductionThe various physical and mechanical parameters of metallopolymeric nanocomposites can be considerably improved with retention or sometimes even with the increase in the conventional magnetic characteristics (saturation magnetization, coercive force, etc.) that show considerable promise for various applications. Such substances are very perspective as high-density information media, materials for permanent magnets, magnetic cooling systems, or fabrication of magnetic sensors. They can also be used for medical and biological applications, e.g., for magnetic resonance tomography, magnetic targeted drug delivery systems, magnetic resonance imaging (MRI) contrast enhancement, color imaging, and cell sorting [1,2].Ferromagnetic metal particles can be formed in a polymer matrix (ferroplastics or ferroelastics) by practically all methods for synthesis of metal nanoparticles in polymers. The manufacturing method can be subdivided into three large groups: physical, chemical, and physicochemical. The division is very conventional and is based mostly on the method of nanoparticle formation and the character of their interactions with the matrix. The first group of methods includes the procedures seemingly devoid of any chemical interactions between the dispersed phase and the dispersion medium. Composites of this type are rare. More popular chemical methods of manufacturing nanocomposites are based on interactions between components anticipated or detected. The reduction reactions and precursors are well known. Nevertheless, the new approaches have been elaborated from practical demands and many details of the chemical reduction are still unclear. The third group of methods are those when metal or their oxide nanoparticles are formed using high-energy processes of atomic metal evaporation, including low-temperature discharge plasma, radiolysis, and photolysis in the presence of monomer and polymer. Recently, such methods have become widely used in vacuum metallization Magnetic Nanoparticles. Sergey P. Gubin

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“…We proposed an original procedure for the preparation of metal/N-doped carbon nanocomposites using the coupled process of frontal polymerization (FP) and controlled thermolysis of acrylamide complexes of metal nitrates [48][49][50][51][52]. It should be noted that the FP of acrylamide complexes of transition and noble metal nitrates is the first case of purely thermal initiation of the process in the absence of material initiators described in the literature; the latter are widely used in the case of many other systems in the production of polymeric materials and composites by the FP method [53][54][55][56].…”

Section: Introductionmentioning

confidence: 99%

Polymer-Assisted Synthesis, Structure and Magnetic Properties of Bimetallic FeCo- and FeNi/N-Doped Carbon Nanocomposites

Kugabaeva,

Kydralieva,

Bondarenko

et al. 2023

Magnetochemistry

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Bimetallic FeCo and FeNi nanoparticles attract much attention due to their promising magnetic properties and a wide range of practical applications as recording and storage media, catalytic systems in fuel cells, supercapacitors, lithium batteries, etc. In this paper, we propose an original approach to the preparation of FeCo- and FeNi/N-doped carbon nanocomposites by means of a coupled process of frontal polymerization and thermolysis of molecular co-crystallized acrylamide complexes. The phase composition, structure, and microstructure of the resulting nanocomposites are studied using XRD, IR spectroscopy, elemental and thermal analysis, and electron microscopy data. The main magnetic characteristics of the synthesized nanocomposites, including the field dependences and the ZFC-FC curves peculiarities, are studied. It is shown that the obtained FeCo/N-C nanocomposites exhibit exchange bias behavior at low temperatures. In turn, FeNi/N-C nanocomposites are ferromagnetically ordered.

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Formation of stable magnetic nanoparticles by pyrolysis of metal containing polymers

Cited by 7 publications

References 3 publications

Characterization of stabilized porous magnetite core-shell nanogel composites based on crosslinked acrylamide/sodium acrylate copolymers

Characterization of stabilized porous magnetite core-shell nanogel composites based on crosslinked acrylamide/sodium acrylate copolymers

Magnetic Metallopolymer Nanocomposites: Preparation and Properties

Polymer-Assisted Synthesis, Structure and Magnetic Properties of Bimetallic FeCo- and FeNi/N-Doped Carbon Nanocomposites

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