Spray drying is not only a useful method of changing liquids into
solids for increasing shelf-life and stability of the product but reduced
volume also helps in easy handling. Spray drying is one of the common
methods for encapsulating sensitive ingredients by using carrier agents
that will act as a coating material or ‘wall’ to isolate them from the
outside environment and to protect against oxidation [4]. The most
commonly used microencapsulating agents are maltodextrin, gum arabic
or a combination of both. The addition of carrier agents into the feed
solution influences the properties and stability of powder. The addition
of high molecular weight additives to the product before atomizing is a
widely used alternative that increases glass transition temperature [5].
Tonon et al. [6] reported the significant effect of inlet air temperature
on the physicochemical properties of the spray-dried powder. The quality
of reconstituted spray-dried powder is good because the product
temperature is rarely elevated above 100 °C