Pilot-scale production and physicochemical characterisation of spray-dried nanoparticulated whey protein powders

Jacob Guralnick, Ram Panthi, Francesca Bot, Valeria Cenini, Barry O'Hagan, Shane V Crowley Crowley, James O'Mahony

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Abstract

Spray-dried whey protein isolate (WPI) powders were prepared at pilot-scale from solutions without heat (WPIUH), heated (WPIH) or heated with calcium (WPIHCa), which were analysed and compared with a control sample (WPIC). WPIC, WPIUH, WPIH and WPIHCa solutions had whey protein denaturation levels of 0.0, 3.2, 64.4 and 74.4%, respectively. Computerised tomography scanning showed that 52.6, 84.0, 74.5 and 41.9% of WPIC, WPIUH, WPIH and WPIHCa powder particles had diameters of ≤30 µm. WPIHCa and WPIH powders were cohesive, while WPIC and WPIUH powders were easy flowing. Marked differences in microstructure were observed between WPIH and WPIHCa. There were no measured differences in wall friction, bulk density or colour.
Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalInternational Journal of Dairy Technology
Early online date10 Jun 2021
DOIs
Publication statusE-pub ahead of print - 10 Jun 2021

Keywords

  • Whey protein
  • Nanoparticles
  • Aggregation
  • Powder
  • Physical properties

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