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Comparative Emulsifying Properties of Octenyl Succinic Anhydride (OSA)-Modified Starch: Granular Form vs Dissolved State : x

Matos González, Maria LU ; Marefati, Ali LU ; Gutiérrez, Gemma; Wahlgren, Marie LU and Rayner, Marilyn LU (2016) In PLoS ONE 11(8). p.0160140-0160140
Abstract
The emulsifying ability of OSA-modified and native starch in the granular form, in the dissolved state and a combination of both was compared. This study aims to understand mixed systems of particles and dissolved starch with respect to what species dominates at droplet interfaces and how stability is affected by addition of one of the species to already formed emulsions. It was possible to create emulsions with OSA-modified starch isolated from Quinoa as sole emulsifier. Similar droplet sizes were obtained with emulsions prepared at 7% (w/w) oil content using OSA-modified starch in the granular form or molecularly dissolved but large differences were observed regarding stability. Pickering emulsions kept their droplet size constant after... (More)
The emulsifying ability of OSA-modified and native starch in the granular form, in the dissolved state and a combination of both was compared. This study aims to understand mixed systems of particles and dissolved starch with respect to what species dominates at droplet interfaces and how stability is affected by addition of one of the species to already formed emulsions. It was possible to create emulsions with OSA-modified starch isolated from Quinoa as sole emulsifier. Similar droplet sizes were obtained with emulsions prepared at 7% (w/w) oil content using OSA-modified starch in the granular form or molecularly dissolved but large differences were observed regarding stability. Pickering emulsions kept their droplet size constant after one month while emulsions formulated with OSA-modified starch dissolved exhibited coalescence. All emulsions stabilized combining OSA-modified starch in granular form and in solution showed larger mean droplet sizes with no significant differences with respect to the order of addition. These emulsions were unstable due to coalescence regarding presence of free oil. Similar results were obtained when emulsions were prepared by combining OSA-modified granules with native starch in solution. The degree of surface coverage of starch granules was much lower in presence of starch in solution which indicates that OSA-starch is more surface active in the dissolved state than in granular form, although it led to unstable systems compared to starch granule stabilized Pickering emulsions, which demonstrated to be extremely stable.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
starch, Pickering emulsion
in
PLoS ONE
volume
11
issue
8
pages
0160140 - 0160140
publisher
Public Library of Science
external identifiers
  • scopus:84982182481
ISSN
1932-6203
DOI
10.1371/journal.pone.0160140
language
English
LU publication?
yes
id
e8488954-b99a-48d2-967d-c44d27897562
date added to LUP
2016-09-20 22:32:56
date last changed
2017-04-30 17:33:32
@article{e8488954-b99a-48d2-967d-c44d27897562,
  abstract     = {The emulsifying ability of OSA-modified and native starch in the granular form, in the dissolved state and a combination of both was compared. This study aims to understand mixed systems of particles and dissolved starch with respect to what species dominates at droplet interfaces and how stability is affected by addition of one of the species to already formed emulsions. It was possible to create emulsions with OSA-modified starch isolated from Quinoa as sole emulsifier. Similar droplet sizes were obtained with emulsions prepared at 7% (w/w) oil content using OSA-modified starch in the granular form or molecularly dissolved but large differences were observed regarding stability. Pickering emulsions kept their droplet size constant after one month while emulsions formulated with OSA-modified starch dissolved exhibited coalescence. All emulsions stabilized combining OSA-modified starch in granular form and in solution showed larger mean droplet sizes with no significant differences with respect to the order of addition. These emulsions were unstable due to coalescence regarding presence of free oil. Similar results were obtained when emulsions were prepared by combining OSA-modified granules with native starch in solution. The degree of surface coverage of starch granules was much lower in presence of starch in solution which indicates that OSA-starch is more surface active in the dissolved state than in granular form, although it led to unstable systems compared to starch granule stabilized Pickering emulsions, which demonstrated to be extremely stable.<br/><br/>},
  articleno    = {0160140},
  author       = {Matos González, Maria and Marefati, Ali and Gutiérrez, Gemma and Wahlgren, Marie and Rayner, Marilyn},
  issn         = {1932-6203},
  keyword      = {starch,Pickering emulsion},
  language     = {eng},
  month        = {08},
  number       = {8},
  pages        = {0160140--0160140},
  publisher    = {Public Library of Science},
  series       = {PLoS ONE},
  title        = {Comparative Emulsifying Properties of Octenyl Succinic Anhydride (OSA)-Modified Starch: Granular Form vs Dissolved State :  x},
  url          = {http://dx.doi.org/10.1371/journal.pone.0160140},
  volume       = {11},
  year         = {2016},
}