AERC2018 and the XV Meeting of the Italian Society of Rheology

April 17-20, 2018 - Sorrento, Italy

Paper Number
FP20 

Session
Food, Pharmaceutics & Cosmetics

Title
Mechanisms of drying-induced particle formation in mixtures of dairy proteins: a multiscale approach

Presentation Date and Time
20 April 2018 (Friday) 15:20

Track / Room
Track 4 / Nettuno 1

Authors (Click on name to view author profile)

  1. Lanotte, Luca (Institut National de la Recherche Agronomique, INRA, Science et technologie du lait et de l'œuf, STLO)
  2. Le Floch-Fouere, Cécile (Agrocampus Ouest, STLO)
  3. Boissel, Françoise (Agrocampus Ouest, STLO)
  4. Schuck, Pierre (Institut national de la recherche agronomique, INRA, STLO)
  5. Jeantet, Romain (Agrocampus Ouest, STLO)

Author and Affiliation Lines (in printed abstract book)
Luca Lanotte1, Cécile Le Floch-Fouere2, Françoise Boissel2, Pierre Schuck1, and Romain Jeantet2
1Science et technologie du lait et de l'œuf, STLO, Institut National de la Recherche Agronomique, INRA, Rennes, Ille-et-Vilaine 35000, France; 2STLO, Agrocampus Ouest, Rennes, France

Speaker / Presenter 
Lanotte, Luca

Text of Abstract
The production of milk powders involves nowadays a significant portion of the dairy industry. Due to its rich composition in terms of proteins and macromolecules, shedding light on the mechanisms characterizing the evaporation of milk is a scientific challenge and an industrial need at the same time. In this study, we use a multi-scale approach to investigate the separate roles of the two major milk protein components (whey protein isolates and native micellar caseins) on the drying of droplets with different whey protein to casein ratio. The evolution of the desiccation phases and the morphology of the samples are observed coupling mass measurements, optical/confocal microscopy and ultrasounds. Our outcomes highlight how the physico-chemical properties at the molecular scale significantly affect dried particle formation and their final shape and mechanical behavior. We show that the sol-gel transition governs the development of the particle skin in case of single dairy protein solution, regardless of the type. The case of the whey protein / micellar caseins mixes is discussed in a second time.