Synthesis and characterization of magnetite (Fe₃O₄)—Polyvinyl alcohol‐based nanocomposites and study of superparamagnetism

Abstract

The aim of this investigation was to design iron oxide containing nanocomposites which could display superparamagnetic behavior and thus find application in biomedical and allied fields. To achieve the proposed objectives methyl methacrylate was polymerized by a redox system comprising of metabisulphite and persulphate in the immediate presence of a crosslinker, N,N 0methylene bis acrylamide and a preformed polymer, i.e., polyvinyl alcohol. Into the prepared polymer matrix nanosized magnetite (Fe 3 O 4 ) particles were evenly dispersed by in situ precipitation of Fe 2+ /Fe 3+ ions. The nanocomposite materials were characterized by techniques like FTIR, SEM, TEM, XRD, and DSC. The magnetic behavior of nanocomposites and bulk magnetite particles was studied under varying applied magnetic fields and their superparamagnetic property was examined. The iron-oxide polymer nanocomposites were also studied for microhardness. POLYM. COMPOS., 31:245-255, FIG. 2. SEM image of (a) iron oxide impregnated gel of definite composition: [PVA] ¼ 2.0 g, [MMA] ¼ 9.35 mM, [MBA] ¼ 0.06 mM, and (b) TEM image of iron oxide nanoparticles.

Influence of heat treatment on phase transformation of clay–iron oxide composite

“…Preparation and magnetic properties of silica coated nanoparticles were studied by Mazaleyrat et al [6], synthesis and size-modulation of silica coated maghemite nanoparticles were described by Almeida et al [7]. Characterization of magnetite (Fe 3 O 4 )/polyvinyl alcohol-based nanocomposites and study of their in vitro blood compatibility were published by Bajpai et al [8,9]. Amino acid-coated magnetic nanoparticles which might be applied to cell separation, diagnosis and targeted drug delivery for cancer therapy were investigated by Durmus et al [10].…”

Synthesis of hollow poly(aniline-co-pyrrole)–Fe3O4 composite nanospheres and their microwave absorption behavior

“…The results also indicate that the Fe 3 O 4 nanoparticles had a cubic spinel structure identical to that of the reference material in the JCPDS file (PDF No. 65-3107) [19][20][21].…”

Ultrafine Magnetite Nanopowder: Synthesis, Characterization, and Preliminary Use as Filler of Polymethylmethacrylate Nanocomposites

“…At this regard, given the outstanding interest gained by this class of organic/inorganic materials for applications in many fields, a wide range of resins including polystyrene [30], poly(vinyl alcohol) [31], poly(pyrrole) [32], polyaniline [33,34], and epoxy resins [35] has been already considered.…”