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Pickering emulsifiers based on hydrophobically modified small granular starches Part II – Effects of modification on emulsifying capacity

Marefati, A. LU ; Matos, M.; Wiege, B.; Haase, N. U. and Rayner, M. LU (2018) In Carbohydrate Polymers 201. p.416-424
Abstract

Small granular starches from rice, quinoa, and amaranth were modified with octenyl succinic anhydride (OSA) at 5 defined intervals (0–3.0%) and investigated with respect to emulsifying capacity and stability. Starch granule surfaces were characterized by Brunauer–Emmett–Teller and contact angle measurements. Emulsifying capacity was characterized by multiple light scattering (MLS) and particle size analysis. Stability towards environmental stress was characterized by centrifugation and MLS. Surface hydrophobicity and emulsifying capacity correlated with starch type and modification level. Quinoa stabilized emulsions had the smallest droplet size (e.g. 59.2 μm at 3.0% OSA) and superior stability, both before and after centrifugation,... (More)

Small granular starches from rice, quinoa, and amaranth were modified with octenyl succinic anhydride (OSA) at 5 defined intervals (0–3.0%) and investigated with respect to emulsifying capacity and stability. Starch granule surfaces were characterized by Brunauer–Emmett–Teller and contact angle measurements. Emulsifying capacity was characterized by multiple light scattering (MLS) and particle size analysis. Stability towards environmental stress was characterized by centrifugation and MLS. Surface hydrophobicity and emulsifying capacity correlated with starch type and modification level. Quinoa stabilized emulsions had the smallest droplet size (e.g. 59.2 μm at 3.0% OSA) and superior stability, both before and after centrifugation, especially at the lowest modification levels. Rice and amaranth had larger droplets (99.8 and 84.1 μm at 3.0% OSA respectively). Amaranth, despite its small size showed poorer performance than quinoa, especially at lower modification levels. The higher emulsifying efficiency of quinoa starch granules attributed to the higher protein content.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Amaranth, OSA, Pickering emulsions, Quinoa, Rice, Starch granules
in
Carbohydrate Polymers
volume
201
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:85052315616
ISSN
0144-8617
DOI
10.1016/j.carbpol.2018.08.049
language
English
LU publication?
yes
id
2e27565f-1c6a-4fcf-b2d6-a1c206644c1d
date added to LUP
2018-09-24 14:05:44
date last changed
2019-02-20 11:27:23
@article{2e27565f-1c6a-4fcf-b2d6-a1c206644c1d,
  abstract     = {<p>Small granular starches from rice, quinoa, and amaranth were modified with octenyl succinic anhydride (OSA) at 5 defined intervals (0–3.0%) and investigated with respect to emulsifying capacity and stability. Starch granule surfaces were characterized by Brunauer–Emmett–Teller and contact angle measurements. Emulsifying capacity was characterized by multiple light scattering (MLS) and particle size analysis. Stability towards environmental stress was characterized by centrifugation and MLS. Surface hydrophobicity and emulsifying capacity correlated with starch type and modification level. Quinoa stabilized emulsions had the smallest droplet size (e.g. 59.2 μm at 3.0% OSA) and superior stability, both before and after centrifugation, especially at the lowest modification levels. Rice and amaranth had larger droplets (99.8 and 84.1 μm at 3.0% OSA respectively). Amaranth, despite its small size showed poorer performance than quinoa, especially at lower modification levels. The higher emulsifying efficiency of quinoa starch granules attributed to the higher protein content.</p>},
  author       = {Marefati, A. and Matos, M. and Wiege, B. and Haase, N. U. and Rayner, M.},
  issn         = {0144-8617},
  keyword      = {Amaranth,OSA,Pickering emulsions,Quinoa,Rice,Starch granules},
  language     = {eng},
  month        = {12},
  pages        = {416--424},
  publisher    = {Elsevier},
  series       = {Carbohydrate Polymers},
  title        = {Pickering emulsifiers based on hydrophobically modified small granular starches Part II – Effects of modification on emulsifying capacity},
  url          = {http://dx.doi.org/10.1016/j.carbpol.2018.08.049},
  volume       = {201},
  year         = {2018},
}