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Pickering emulsifiers based on hydrophobically modified small granular starches – Part I : Manufacturing and physico-chemical characterization

Marefati, A. LU ; Wiege, B.; Haase, N. U.; Matos González, Maria LU and Rayner, M. LU (2017) In Carbohydrate Polymers 175. p.473-483
Abstract

Small granular starches from rice, quinoa and amaranth were hydrophobized by esterification with octenyl succinic anhydride (OSA) in an aqueous alkaline slurry to obtain series of modified starches at defined intervals (i.e. 0.6, 1.2, 1.8, 2.4, 3.0%). The physical and the physico-chemical properties of the starch particles were characterized by proximate analysis including protein level, amylose level and dry matter. The shape and size of the starch granules were characterized by scanning electron microscopy and light scattering. The gelatinization properties were characterized by differential scanning calorimetry. The degree of modification was determined by titration with NaOH. With regard to the emulsion formulation and in order to... (More)

Small granular starches from rice, quinoa and amaranth were hydrophobized by esterification with octenyl succinic anhydride (OSA) in an aqueous alkaline slurry to obtain series of modified starches at defined intervals (i.e. 0.6, 1.2, 1.8, 2.4, 3.0%). The physical and the physico-chemical properties of the starch particles were characterized by proximate analysis including protein level, amylose level and dry matter. The shape and size of the starch granules were characterized by scanning electron microscopy and light scattering. The gelatinization properties were characterized by differential scanning calorimetry. The degree of modification was determined by titration with NaOH. With regard to the emulsion formulation and in order to assess the emulsifying capacity of the small granular starches, the effect of starch type, degree of modification and starch concentration on the resulting emulsion droplet size were evaluated by light scattering and optical microscopy. Emulsifying properties were found to depend on the degree of substitution, size of the granules and the starch to oil ratio of the formulation. Quinoa starch granules, in general, had the best emulsifying capacity followed by amaranth and rice. However, in higher starch concentrations (>400 mg/mL oil) and adequate levels of OSA (3.0%) amaranth performed best, having the smallest size of starches studied.

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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
175
pages
11 pages
publisher
Elsevier
external identifiers
  • scopus:85028362093
ISSN
0144-8617
DOI
10.1016/j.carbpol.2017.07.044
language
English
LU publication?
yes
id
84d6ba05-2daf-4d00-9711-5c29968f6c34
date added to LUP
2017-09-06 09:27:55
date last changed
2017-09-06 09:27:55
@article{84d6ba05-2daf-4d00-9711-5c29968f6c34,
  abstract     = {<p>Small granular starches from rice, quinoa and amaranth were hydrophobized by esterification with octenyl succinic anhydride (OSA) in an aqueous alkaline slurry to obtain series of modified starches at defined intervals (i.e. 0.6, 1.2, 1.8, 2.4, 3.0%). The physical and the physico-chemical properties of the starch particles were characterized by proximate analysis including protein level, amylose level and dry matter. The shape and size of the starch granules were characterized by scanning electron microscopy and light scattering. The gelatinization properties were characterized by differential scanning calorimetry. The degree of modification was determined by titration with NaOH. With regard to the emulsion formulation and in order to assess the emulsifying capacity of the small granular starches, the effect of starch type, degree of modification and starch concentration on the resulting emulsion droplet size were evaluated by light scattering and optical microscopy. Emulsifying properties were found to depend on the degree of substitution, size of the granules and the starch to oil ratio of the formulation. Quinoa starch granules, in general, had the best emulsifying capacity followed by amaranth and rice. However, in higher starch concentrations (&gt;400 mg/mL oil) and adequate levels of OSA (3.0%) amaranth performed best, having the smallest size of starches studied.</p>},
  author       = {Marefati, A. and Wiege, B. and Haase, N. U. and Matos González, Maria and Rayner, M.},
  issn         = {0144-8617},
  keyword      = {Amaranth,OSA,Pickering emulsions,Quinoa,Rice,Starch granules},
  language     = {eng},
  month        = {11},
  pages        = {473--483},
  publisher    = {Elsevier},
  series       = {Carbohydrate Polymers},
  title        = {Pickering emulsifiers based on hydrophobically modified small granular starches – Part I : Manufacturing and physico-chemical characterization},
  url          = {http://dx.doi.org/10.1016/j.carbpol.2017.07.044},
  volume       = {175},
  year         = {2017},
}