Effectiveness of encapsulating biopolymers to produce sub-micron emulsions by high energy emulsification techniques

Jafari, Seid Mahdi, He, Yinghe, and Bhandari, Bhesh (2007) Effectiveness of encapsulating biopolymers to produce sub-micron emulsions by high energy emulsification techniques. Food Research International, 40 (7). pp. 862-873.

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Abstract

In this study, different emulsifying ingredients were used to produce sub-micron emulsions for encapsulation purposes. Maltodextrin combined with a surface-active biopolymer (modified starch, or whey protein concentrate), or a small molecule surfactant (Tween 20) were used as the continuous phase, while d-limonene was the dispersed phase. Results showed that biopolymers are not efficient ingredients to produce very small emulsion droplets compared with small molecule surfactants because of their slow adsorption kinetics. The main problem with surfactants also is instability of the resulted emulsions due to “depletion and bridging flocculation” caused by free biopolymers and competition between surfactant and surface-active biopolymers. In general, it was not possible to produce a fairly stable microfluidized emulsion with surfactants for encapsulation purposes.

Item ID: 2489
Item Type: Article (Research - C1)
ISSN: 1873-7145
Keywords: re-coalescence; Tween 20; microfluidizer; emulsification; flocculation; droplet size distribution
Additional Information:

Date Deposited: 29 Nov 2009 23:34
FoR Codes: 09 ENGINEERING > 0904 Chemical Engineering > 090499 Chemical Engineering not elsewhere classified @ 50%
09 ENGINEERING > 0908 Food Sciences > 090805 Food Processing @ 50%
SEO Codes: 86 MANUFACTURING > 8601 Processed Food Products and Beverages (excl. Dairy Products) > 860199 Processed Food Products and Beverages (excl. Dairy Products) not elsewhere classified @ 100%
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