Obtaining Polyurethane Microcapsules Using Interphases Polymerization

Microencapsulation is a process in which around solid particles, liquids or molecular dispersions spherical shell from other material is made. Capsule membrane can be one or multi-walled, with varied thickness, porosity, mechanical strength or size. Application areas of microcapsules include agriculture, pharmacy, food, cosmetics, textiles, paints, adhesives and coatings, etc [1]. In this work in order to obtain self-healing coating materials that can autonomously extend the lifetime of the surface material, polyurethane microcapsules were formed. Microcapsules were synthesized by interfacial polymerization. For capsule shell forming polyol (glycerol or 1,3-propanediol) and toluene diisocyanate was used, while role of active agent performed isophorone diisocyanate. As a solvent cyclohexanone was taken, but as surfactant – gum arabic. In order to evaluate morphology and surface features of microcapsules scanning electron microscope SEM Tescan TS 5136 MM with secondary electron detector and VEGA TC computer software was used. To ensure isocyanate existence inside capsules, samples were tested using FT-IR spectroscopy