Flame spray drying of maltodextrin

Abstract

In the frame of this work, the experimental analysis of the reconstitution properties, sorption isotherms and the Fourier-transform infrared spectroscopy (FTIR) spectra of maltodextrin powder was carried out. Before the analysis the substance was dried by standard spray drying method or flame spray drying (FSD). During the analyses, the influence of the applied FSD parameters on the analyzed properties was also estimated. The powders dried using the standard spray dryer were characterized by a better wettability parameter, which was related to a high bulk density. A shorter solubility time was obtained for powders dried by the FSD method, which may be explained by the larger particle diameters. Analyzing maltodextrin powders dried with the FSD, a significant influence of the atomization pressure and particle size on the wettability parameter was found. Application of FSD method does not affect the sorption characteristics of maltodextrin and does not change significantly the chemical structure of the material, since characteristic peaks of FTIR spectra were preserved after the FSD.