Effect of Carriers On The Solubility And Glass Transition Temperature (Tg) Of Spray Dried Pomegranate Powders

This work aimed to study on the defect of carriers on the crystallization ad solubility of powder of pomegranate juice during the pocess of spray drying . Also the correlation of the microstructure of the powder with the functional properties as stickiness and solubility was studied . To perform this work , we used pomegranate juice with 40-50˚ Brix . Before being dehydrated , the juice was diluted to 12 ˚Brix and undertook addition from the following carriers : maltodextrin , Arabic gum and waxy starch in the concentration of 12% with addition of different concentration of cellulose . The powder was obtained through the use of a mini-spray dryer of laboratorial scale . Glass Transition Temperature (Tg) of spray-dried pomegranate powders were obtained using differential scanning calorimetry (DSC) method . Analyses of microstructure , stickiness , and solubility were performed on the obtained powder . The microstructure analyses showed that adding cellulose can prevent the amorphous aspect of spray dried powders . Among different carriers used in this work , Arabic gum , showed the best surface propertis and less stickiness.

کلیدواژه ها:

Carriers ، Crysalline cellulose ، Microstructure ، Stickiness ، Spray drying ، Tg points