Rheology of emulsion-filled alginate microgel suspensions

Ching, Su Hung, Bansal, Nidhi and Bhandari, Bhesh (2016) Rheology of emulsion-filled alginate microgel suspensions. Food Research International, 80 50-60. doi:10.1016/j.foodres.2015.12.016

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Author Ching, Su Hung
Bansal, Nidhi
Bhandari, Bhesh
Title Rheology of emulsion-filled alginate microgel suspensions
Journal name Food Research International   Check publisher's open access policy
ISSN 0963-9969
1873-7145
Publication date 2016-02-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.foodres.2015.12.016
Open Access Status File (Author Post-print)
Volume 80
Start page 50
End page 60
Total pages 11
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
Subject 1106 Food Science
Abstract Emulsion filled polysaccharide gels can be used as carrier systems of lipophilic bioactives in the food, pharmaceutical and cosmetics industry. This carrier system can exist either as bulk or discrete gel systems. In this study the rheological properties of discrete emulsion filled alginate microgel suspension was examined as a function of volume fraction (ϕ) and oil content. Fine emulsion (220 nm) was encapsulated within alginate microgels (mean size 36.2–57.8 μm) by using the impinging aerosol technique. The microgels (containing 0–77% w/w oil total solids basis) produced were estimated to have particle modulus in the range of 150–212 Pa. An increase in oil content in the microgels led to more deformable microgels due to the reduction in gel density. The deformability of microgels influenced the bulk modulus and apparent viscosity of the concentrated suspension. At the same suspension volume fraction (ϕ), suspensions with more deformable microgels exhibited a lower bulk modulus. We also showed that the Carreau and Cross models were adequate in predicting the flow behaviour of the concentrated emulsion filled microgel suspension.
Keyword Calcium alginate microgel
Emulsion gel
Microgel suspension
Rheology
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Agriculture and Food Sciences
 
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
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