Polymer-Assisted Synthesis, Structure and Properties of Metal Nanocomposites

Abstract

We have elaborated methods for synthesis of macromolecular metal complexes via homo- and copolymerization of metal-containing monomers (unsaturated metal carboxylates, metal nitrates acrylamide complexes. Thermal transformations of such compounds possess the unique way for preparation of nanocomposite materials when metal (or their oxides and carbides) nanoparticles and a stabilizing polymer matrix are formed simultaneously in situ. Molecular and supramolecular organization of nanocomposites obtained can be controlled during the thermal transformation of such monomers in inert or self-generated atmosphere. The process includes three macrostages: dehydration, solid-phase polymerization, and pyrolysis of the polymer products formed. The approach makes it possible to adjust the mean particle size in a given range by just choosing the appropriate reaction conditions. The composition of metal nanoparticles, their size and distribution on the size as well as the type and thickness of polymer shell can be controlled on the stage of nanocomposite formation. The nanocomposites obtained reveal ferromagnetic behaviour at room temperature with high coercive force and magnetic anisotropy. With aim to control the composition and structure (for example, core-shell type) of ferromagnetic nanomaterials obtained as well as their properties, the reaction conditions such as temperature, ratio of starting compounds, the type of polymer matrix can be varied. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35061