Mehrdad Manteghian - Professor, Department of Chemical Engineering, Faculty of Engineering, Tarbiat Modares University,
Mina Naderi - MSc in Chemical Engineering, Tarbiat Modares University,
Fatemeh Borazjani - MSc in Chemical Engineering, Islamic Azad University of Bushehr research

The aim of this study is to produce urea nanoparticles for agriculture and industrial applications. Producing urea nanoparticles through adding an anti-solvent (nitric acide) and using PVD and SDS as stabilizers in various concentrations and volumes of urea and stabilizers is discussed in this paper. Induction time is measured by visual observations and the effect of stabilizers on primary and secondary nucleation mechanisms is investigated. A refractometer is used to determine the urea equilibrium concentration. The results show that the nucleation mechanism is of primary type, whether there s a stabilizer or not. Thus, the stabilizer type doesn t influence the nucleation mechanism. Also, photos are taken of a sample consisting of A molar urea and B molar SDS stabilizer using a TEM microscope. The photos confirmed urea nanoparticles formation.

Urea nanoparticles, PVP stabilizer, SDS stabilizer, Anti-solvent. Induction time