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Publisher DOI: 10.3390/polym13234063
Title: Conversion of whey protein aerogel particles into oleogels : effect of oil type on structural features
Language: English
Authors: Plazzotta, Stella 
Jung, Isabella 
Schroeter, Baldur  
Subrahmanyam, Raman 
Smirnova, Irina  
Calligaris, Sonia 
Gurikov, Pavel 
Manzocco, Lara 
Keywords: aerogel; oleogel; rheological properties; oil type; absorption
Issue Date: 23-Nov-2021
Publisher: Multidisciplinary Digital Publishing Institute
Source: Polymers 13 (23): 4063 (2021)
Abstract (english): 
Protein aerogel particles prepared by supercritical-CO₂-drying (SCD) of ground whey protein (WP) hydrogels (20% w/w, pH 5.7) were converted into oleogels by dispersion in selected edible oils (castor, cod liver, corn, flaxseed, MCT, peanut and sunflower oil). The obtained oleogels were analysed for oil content, microstructure, rheological properties, and ATR-FTIR spectra. Except for castor oil, solid-like, plastic materials with comparable composition (80% oil, 20% WP) and rheological properties (G′~3.5 × 10 5 Pa, G″~0.20 × 10 5 Pa, critical stress~800 Pa, tanδ~0.060) were obtained. Optical and confocal microscopy showed that the generated structure was associated with the capillary-driven absorption of oil into the porous aerogel particles interconnected via particle-particle interactions. In this structure, the oil was stably entrapped. Results evidenced the reduced role of edible oil characteristics with the exception of castor oil, whose high polarity probably favoured particle–oil interactions hindering particle networking. This work demonstrates that WP aerogels could be regarded as versatile oleogel templates allowing the structuring of many edible oils into solid-like materials.
DOI: 10.15480/882.3937
ISSN: 2073-4360
Journal: Polymers 
Other Identifiers: doi: 10.3390/polym13234063
Institute: Thermische Verfahrenstechnik V-8 
Entwicklung und Modellierung Neuartiger Nanoporöser Materialien V-EXK2 
Document Type: Article
Project: Advanced Engineering and Research of aeroGels for Environment and Life Sciences 
Funded by: European Commission 
Deutsche Forschungsgemeinschaft (DFG) 
More Funding information: Work carried out in the framework of COST Action CA18125 “Advanced Engineering and Research of aeroGels for Environment and Life Sciences” (AERoGELS), funded by the European Commission”. Baldur Schroeter and Irina Smirnova acknowledge the DFG (SM 82/18-1) for a partial support of this work.
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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