Cross-linked nanocomposite hydrogels based on poly(acryl amide) and mineral nanoparticles (NP) of hydroxyapatite (HAP), ZnO, TiO2 modified by reactive polymers were synthesized via the technique of polymerization filling. It was shown that physico-mechanical properties of obtained nanocomposites are determined to a great extend by the nature of the modifier of mineral NP.
In this work, high density polyethylene, HDPE, was compounded in a twin screw extruder with organophilic treated montmorillonite clay and a compatibilizer agent. The screws configuration was changed from distributive to highly dispersive , using four different profiles. The extrusion conditions were also changed. The exfoliation degree was evaluated by X-rays. The rheological measurements showed different behavior according to the processing adopted.
Recently the development of new materials, in special polymeric nanocomposites, formed by polymer and layered silicates, have gained attention. In this work nanocomposites based on high-density polyethylene matrix (HDPE) and organically modified clay were prepared by melt processing and characterized by the determination of proton spin-lattice relaxation time through solid state nuclear magnetic resonance (NMR) spectroscopy.
Polymer hydroxyethylcellulose matrix modification was made by mechanochemical method using copper containing nanoparticles, obtained by electrochemical reduction from copper sulphate solutions in water- ethanol medium. Interactions of copper containing nanoparticles with hydroxyethylcellulose were studies. Antimicrobial effect of the nanocomposites obtained was found.
Nanocomposites “activated carbon–zirconium(IV) oxide” were synthesized by homogeneous precipitation. The obtained samples were characterized by X-ray analysis and electron microscopy. The chemical composition of the nanocomposites was determined by the thermal analysis. Sorption properties were determined. The degree of phosphate ions removal was almost 97 %.
This paper presents some features and applications of sol-gel technology for production of organic mineral hybrid nanocomposites which might be affected. It defines some principles of synthesis and application of hybrid nanomaterials in various fields of technology, using specific examples.