Development of a dehydrated dressing-type emulsion with instant powder characteristics

Publication date: Available online 4 March 2019Source: Food StructureAuthor(s): Fotini Plati, Anthia Matsakidou, Vassilios Kiosseoglou, Adamantini ParaskevopoulouABSTRACTIn this work the development of a dressing-type emulsion powder with instant characteristics was attempted. Two dehydration methods (oven-drying and nano spray drying) were evaluated using maltodextrin in admixture with carboxymethylcellulose or gum Arabic as coating materials. Droplet size distribution of the initial emulsions was first considered, while the resulting powders were analysed for moisture, total and free oil content, oil encapsulation efficiency, morphological characteristics, physical and flow properties and reconstitution behaviour. The results showed that particles of irregular shape, micron size, high free oil content and low encapsulation efficiency were obtained through oven-drying, while nano spray drying led to spherical, of smaller average diameter powder particles along with lower “free” oil content and higher encapsulation efficiency. Regarding their handling properties, all powders were very cohesive with poor flowability. Dehydration method significantly affected both bulk and reconstitution properties with the spray-dried powders exhibiting lower bulk and tapped density, higher dispersibility and satisfactory wettability, all related to their instantaneous character. This powdered dressing-type emulsion can be used as it is by sprinkling directly on vegetable salads and other ...
Source: Food Structure - Category: Food Science Source Type: research