Interfacial properties, film dynamics and bulk rheologyA multi-scale approach to dairy protein foams
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Interfacial properties, film dynamics and bulk rheology : A multi-scale approach to dairy protein foams. / Audebert, Alexia; Saint-Jalmes, Arnaud; Beaufils, Sylvie; Lechevalier, Valérie; Le Floch-Fouéré, Cécile; Cox, Simon; Leconte, Nadine; Pezennec, Stéphane.
In: Journal of Colloid and Interface Science, Vol. 542, 15.04.2019, p. 222-232.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Interfacial properties, film dynamics and bulk rheology
T2 - A multi-scale approach to dairy protein foams
AU - Audebert, Alexia
AU - Saint-Jalmes, Arnaud
AU - Beaufils, Sylvie
AU - Lechevalier, Valérie
AU - Le Floch-Fouéré, Cécile
AU - Cox, Simon
AU - Leconte, Nadine
AU - Pezennec, Stéphane
PY - 2019/4/15
Y1 - 2019/4/15
N2 - HypothesisThe effective contribution of interfacial properties to the rheology of foams is a source of many open questions. Film dynamics during topological T1 changes in foams, essentially studied for low molecular weight surfactants, and scarcely for proteins, could connect interfacial properties to protein foam rheology.ExperimentsWe modified whey protein isolate (WPI), and its purified major protein β-lactoglobulin (β-lg) by powder pre-conditioning and dry-heating in order to obtain a broad variety of interfacial properties. We measured interfacial properties, film relaxation duration after a T1 event and bulk foam rheology.FindingsWe found that, for β-lg, considered as a model protein, the higher the interfacial elastic modulus, the longer the duration of topological T1 changes and the greater the foam storage and loss moduli and the yield stress. However, in the case of the more complex WPI, these correlations were less clear. We propose that the presence in WPI of other proteins, lactose and minerals modify the impact of pre-conditioning and dry-heating on proteins and thereby, their behaviour at the interface and inside the liquid film
AB - HypothesisThe effective contribution of interfacial properties to the rheology of foams is a source of many open questions. Film dynamics during topological T1 changes in foams, essentially studied for low molecular weight surfactants, and scarcely for proteins, could connect interfacial properties to protein foam rheology.ExperimentsWe modified whey protein isolate (WPI), and its purified major protein β-lactoglobulin (β-lg) by powder pre-conditioning and dry-heating in order to obtain a broad variety of interfacial properties. We measured interfacial properties, film relaxation duration after a T1 event and bulk foam rheology.FindingsWe found that, for β-lg, considered as a model protein, the higher the interfacial elastic modulus, the longer the duration of topological T1 changes and the greater the foam storage and loss moduli and the yield stress. However, in the case of the more complex WPI, these correlations were less clear. We propose that the presence in WPI of other proteins, lactose and minerals modify the impact of pre-conditioning and dry-heating on proteins and thereby, their behaviour at the interface and inside the liquid film
KW - foam rheology
KW - interfacial rheology
KW - topological rearrangement
KW - disproportionation
KW - Whey protein
KW - powder dry-heating
U2 - 10.1016/j.jcis.2019.02.006
DO - 10.1016/j.jcis.2019.02.006
M3 - Article
C2 - 30753945
VL - 542
SP - 222
EP - 232
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
SN - 0021-9797
ER -