Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The microstructure and component distribution in spray-dried emulsion particles
RISE, SP – Sveriges Tekniska Forskningsinstitut.
Show others and affiliations
2016 (English)In: Food Structure, ISSN 2213-3291, Vol. 8, 16-24 p.Article in journal (Refereed) Published
Abstract [en]

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. © 2016

Place, publisher, year, edition, pages
2016. Vol. 8, 16-24 p.
Keyword [en]
Confocal raman microscopy, Particle microstructure, Phase segregation, Spray-dried emulsions
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27673DOI: 10.1016/j.foostr.2016.05.001Scopus ID: 2-s2.0-84979583979OAI: oai:DiVA.org:ri-27673DiVA: diva2:1059176
Available from: 2016-12-22 Created: 2016-12-21 Last updated: 2017-02-06Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus
By organisation
SP – Sveriges Tekniska Forskningsinstitut
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 53 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
v. 2.26.0