A Multiscale Study of Powder Reconstitution Phenomena
also presented into this report particularly in Annex 2.
scheduled as telecommuting was possible for these deliverables. Therefore, the first results of year 3 are
During the lockdown, the third year of the PhD work about modeling was started earlier than
reconstitution conditions in agitated vessels.
(3) Definition of a reconstitutability index reflecting powder reconstitution behavior independently from
(2) Empirical models able to predict reconstitution times from powder physicochemical characteristics;
(1) Fitting of reconstitution kinetics followed by granulometric;
Deliverables of year 3 ((January 2021 – January 2022)
message in Figure 1).
wetting) and sugar nature, location, quantity, coating depth were thoroughly investigated (see take-home
transition temperature, hydrophilicity…Links between powder reconstitutability (more particularly
chosen to cover a whole range of physicochemical properties: solubility, chain length, structure, glass
agreement with IFPRI partners, five sugars (i.e. sucrose, lactose, glucose, fructose, and galactose) were
presenting a low wetting ability (i.e. whey protein powder) and coating was achieved with sugars. In
progress due to the lockdown caused by the CoViD-19 health crisis. The work was focused on a powder
The second year of the PhD work should meet these two stated deliverables which are still in
surface, minimal quantity necessary to improve wetting. etc.).
(2) Determine the effect of surface modifiers (quantities to cover the surface, distribution at the particle
reconstitutability.
(1) Surface chemical mapping and nanoindentation to establish correlations with powder
Deliverables of year 2 (January 2020 – January 2021)
related to year 1 deliverables (Annex 1).
Papers I and II, respectively submitted to Powder Technology and Journal of Food Engineering, are
ranking.
(3) First statistical correlations between the various powder characteristics and their reconstituability
(2) For selected powders: reconstitution kinetics in different conditions of temperature, stirring, etc.,
(1) Powder classification according to their reconstitution behavior,
2020 with the following deliverables:
and their classification according to their reconstitution ability. It was achieved at the end of January
The first year of the PhD work dealt with the systemic physicochemical analysis of powders
(PhD duration: 1st February 2019 –31th January 2022)
Executive summary until October 2020 – year 2