Modulating fracture properties of mixed protein systems

C. Ersch, I. ter Laak, E. van der Linden, P. Venema, A. Martin

Research output: Contribution to journalArticleAcademicpeer-review

21 Citations (Scopus)

Abstract

To design foods with desired textures it is important to understand structure build-up and breakdown. One can obtain a wide range of structures using mixtures of different structuring ingredients such as for example protein mixtures. Mixed soy protein isolate (SPI)/gelatine gels were analyzed for their linear rheological properties, fracture properties and microstructure. The two ingredients were found to form independent networks despite changes in the SPI microstructure, which were attributed to micro phase separation. It is shown that mixing of SPI and gelatine allows to arrive at a large variety of fracture properties. This provides opportunities for tailoring textures in foods using mixed independent gel networks. The fracture stress of mixed gels corresponded to the fracture stress of the strongest of the two gels. At constant fracture stress, increasing Young's modulus of the mixed independent gels resulted in reduced fracture strain.
Original languageEnglish
Pages (from-to)59-65
JournalFood Hydrocolloids
Volume44
DOIs
Publication statusPublished - 2015

Keywords

  • egg white gels
  • whey-protein
  • thermodynamic incompatibility
  • textural characteristics
  • rheological properties
  • structural-properties
  • large-deformation
  • phase-separation
  • milk gels
  • gelatin

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