Synthesis of Hydroxyapatite Nanoparticles with Initiating Centres in Polymer Shell

Abstract

This research work was devoted to the synthesis of hydroxyapatite nanoparticles with initiating centres in polymer shell. Marcroinitiators comprised by heterofunctional copolymers containing either pendant peroxidic groups or benzoin pieces attached to the backbone chain were used as surface modifiers of hydroxyapatite. Their use in the stage of synthesis of the mineral particles makes possible a control over size and the surface properties of particles. The effect of copolymer nature and its concentration, as well as the synthesis conditions on hydroxyapatite particle size and the copolymer adsorption value was studied. Both types of functional groups namely peroxide and benzoin in structure of copolymers immobilized at the hydroxyapatite surface were used for initiation of polymerization processes at elevated temperature (in the first case) or under UV-irradiation (in another case). These techniques of bioceramics modification allowed to form polymer compatibilizing layer of proper structure and thickness bonded with the mineral particles that enhanced compatibility of mineral filler and polymer matrix of different nature and as a result obtaining composite materials with improved physico-mechanical properties. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35447