Journal
FOOD RESEARCH INTERNATIONAL
Volume 41, Issue 2, Pages 172-183Publisher
ELSEVIER
DOI: 10.1016/j.foodres.2007.11.002
Keywords
surface oil content; nano-emulsion; emulsification; surface oil coverage; microfluidization
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Nano-particle encapsulation by spray drying was undertaken by preparing sub-micron emulsions via high energy emulsifying techniques, namely Microfluidization and Ultrasonication. The encapsulation efficiency of fish oil as a core material was investigated. The attention was given to the surface oil content and surface oil coverage of encapsulated powders which are very significant parameters in the encapsulation process. maltodextrin combined with a surface-active biopolymer (modified starch or whey protein concentrate) at a ratio of 3:1 were used as the wall material. Results showed that Microfluidization was an efficient emulsification technique resulting in fish oil encapsulated powder with the lowest unencapsulated oil at the surface of particles, mainly due to its capability to produce emulsions at the nano-range (d(43) of 210-280 nm). (C) 2007 Elsevier Ltd. All rights reserved.
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