title: Characterization of the spray drying behaviour of emulsions containing oil droplets with a structured interface.
abstract: The aim of this study was to characterize the process of atomization and drying of layer-by-layer emulsions containing lecithin (single layer emulsion) and lecithin/chitosan (bilayer emulsion) and the oxidative stability of the microcapsules during storage. For this purpose, the analysis of the emulsion spray droplet size during two-fluid nozzle and rotary atomization was carried out to identify suitable process parameters. The drying behaviour of single and bilayer emulsions was investigated by calculation of the volume flow density during single-droplet drying during acoustic levitation. In spray-dried solid particles, the oxidative stability in the single layer microcapsules was higher than in the bilayer microcapsules. This was partly attributed to lower microencapsulation efficiency in the bilayer microcapsules compared to the single layer microcapsules. Furthermore, it could be shown, that excess chitosan in the bulk carrier matrix affects the free volume elements and thus oxygen diffusion.
authors.affiliation: Department of Food Technology, Institute of Human Nutrition and Food Science, University of Kiel, Kiel, Germany. info@lmmw.tu-berlin.de
authors.forename: Y
authors.initials: Y
authors.lastname: Serfert
authors.forename: J
authors.initials: J
authors.lastname: Schröder
authors.forename: A
authors.initials: A
authors.lastname: Mescher
authors.forename: J
authors.initials: J
authors.lastname: Laackmann
authors.forename: M Q
authors.initials: MQ
authors.lastname: Shaikh
authors.forename: K
authors.initials: K
authors.lastname: Rätzke
authors.forename: V
authors.initials: V
authors.lastname: Gaukel
authors.forename: H P
authors.initials: HP
authors.lastname: Schuchmann
authors.forename: P
authors.initials: P
authors.lastname: Walzel
authors.forename: H-U
authors.initials: HU
authors.lastname: Moritz
authors.forename: S
authors.initials: S
authors.lastname: Drusch
authors.forename: K
authors.initials: K
authors.lastname: Schwarz
mesh_terms: D002214:Capsules / Q000737:chemistry; D048271:Chitosan / Q000737:chemistry*; D004655:Emulsions / Q000737:chemistry; D005395:Fish Oils / Q000737:chemistry*; D054709:Lecithins / Q000737:chemistry*; D008051:Lipid Bilayers / Q000737:chemistry*
chemical_list: D002214:Capsules; D004655:Emulsions; D005395:Fish Oils; D054709:Lecithins; D008051:Lipid Bilayers; D048271:Chitosan