THE EFFECT OF PROCESS PARAMETERS AND SOLUTION PROPERTIES ON MORPHOLOGICAL CHARACTERISTICS OF NANOPARTICLES OBTAINED BY COAXIAL ELECTROSPRAYING

Electrospraying method is an encapsulation method that allows to produce nanoscale particles for food applications. Nanoparticles with different morphologies can be obtained by changing process parameters and solution properties. In this study, black seed oil was encapsulated using coaxial electrospraying method. The aim of this study was to determine the effects of process parameters (flow rate of shell solution, voltage, distance between the spinneret tip and the collector) and solution properties (solvent type, polymer concentration of shell and core solution, surfactant) on morphological properties of zein-black seed oil nanoparticles. The results showed that the change in the concentration of shell solution, the applied voltage and the distance between the needle and the collector had a significant effect on the particle morphology. Nanoparticles lost their sphericity when the zein concentration was increased from 17.5% to 21% (w/v). The increase in distance between the needle and the collector and the applied voltage resulted in the production of spherical and homogeneous particles. The core-shell structure of the particles obtained by the coaxial electrospraying method was confirmed by the confocal microscope image