Abstract

chitosan microspheres for biological applications were prepared by spray-drying method. Two kinds of chitosan with different molecular weigh were used and their characteristics were compared. Scanning electron microscopy was applied to study morphology of the particles. We saw most of the chitosan microparticles had spherical or pseudo-spherical shape. It is found out that Smoothness and sphericity of the particles were significantly increased by the enhancement of chitosan molecular weight.