AI Article Synopsis

  • HIPEs were stabilized by a modified whey protein (f-WPC-80) using supercritical CO2 extrusion technology, resulting in emulsions with up to 80% oil content.
  • At specific pH levels (3.0 and 5.4), f-WPC-80 showed superior stability and gel formation compared to untreated whey protein and sodium caseinate, particularly at concentrations of 1-4 wt%.
  • The findings suggest that these high internal phase emulsions have potential uses in creating healthier and more natural food products.

Article Abstract

High Internal Phase Emulsions (HIPEs) were stabilized by functionalized whey protein concentrate (WPC-80). Functionalization of WPC-80 was done by supercritical CO assisted extrusion technology. HIPEs were formed by 80% oil and 1-4 wt% of control (untreated) whey protein concentrate, extruded/functionalized whey protein concentrates (f-WPC-80) at pH 3.0 and 5.4, and sodium caseinate (NaCas) separately and were characterized for their stability at two temperatures (25 and 40 °C) for 20 days. Results indicated that f-WPC-80-pH3.0 formed self-standing gels at 1 wt% concentrations which were more stable, without phase separation, than those stabilized by commercially used stabilizer NaCas and native c-WPC. At 4% concentration of f-WPC-80-pH3.0, the compressed droplets produced emulsions with self-standing and viscoelastic features. While control WPC-80, could not form stable HIPEs at any investigated concentrations. The reported high internal phase oil-in-water emulsions, offer a potential new system for delivery of nutritionally superior and clean-label products of commercial utility.

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http://dx.doi.org/10.1016/j.foodchem.2021.131362DOI Listing

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