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The microstructure and component distribution in spray-dried emulsion particles
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- Munoz-Ibanez, Marta (författare)
- Inria, France; University of Paris-Saclay, France
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- Nuzzo, Marine (författare)
- Lunds universitet,RISE,SP – Sveriges Tekniska Forskningsinstitut,Lund University, Sweden,-lup-obsolete,Forskargrupper vid Lunds universitet,Food Technology, Engineering and Nutrition-lup-obsolete,Lund University Research Groups,SP Swedish National Testing and Research Institute
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- Turchiuli, Christelle (författare)
- Inria, France; University of Paris-Saclay, France; University of Paris-Sud, France
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- (creator_code:org_t)
- Elsevier BV, 2016
- 2016
- Engelska.
- Ingår i: Food Structure. - : Elsevier BV. - 2213-3291. ; 8, s. 16-24
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Microencapsulation by spray drying of oil-in-water (o/w) emulsions provides a means to encapsulate functional lipophilic ingredients. The active ingredient is dispersed in continuous solid phase providing protection. However, the encapsulation efficiency depends on the microstructure and morphology of the dry particles influenced by several mechanisms occurring during processing such as oil droplet breakup during atomization, ingredient diffusivity, interfacial adsorption of surface active ingredients, and drying kinetics. In this work, sunflower oil (model for lipophilic compounds) was encapsulated in solid particles composed of acacia gum and maltodextrin DE12. Three powders with different initial emulsion size (e.g. about 0.1 and 1 μm) and atomized under high and low shear rate were analysed for the morphology and distribution of oil droplets and matrix constituents within the solid particle (20–100 μm). The microscopic (optical, SEM, LVSEM, confocal Raman), spectroscopic (XPS) and analytical (solvent extraction) techniques used were either qualitative or quantitative. Their combination made it possible to determine both the composition at the surface and inside the particle. The surface differs from the bulk in composition, confirming the constituent segregation during spray drying, and depended on the initial emulsion size and atomization conditions that must be controlled for an efficient encapsulation. Especially, the use of confocal Raman microscopy is promising for the study of processstructure-properties relationship.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Annan teknik -- Livsmedelsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Other Engineering and Technologies -- Food Engineering (hsv//eng)
Nyckelord
- Confocal raman microscopy
- Particle microstructure
- Phase segregation
- Spray-dried emulsions
- Confocal raman microscopy
- Particle microstructure
- Phase segregation
- Spray-dried emulsions
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