期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 542, 期 -, 页码 222-232出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.02.006
关键词
Foam rheology; Interfacial rheology; Topological rearrangement; Disproportionation; Whey protein; Powder dry-heating
资金
- Regional council Bretagne [13008651]
- Regional council Pays de la Loire [2014-07081]
- Universite Bretagne-Loire (UBL)
- EPSRC [EP/N002326/1]
- EPSRC [EP/N002326/1] Funding Source: UKRI
Hypothesis: The 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. Experiments: We modified whey protein isolate (WPI), and its purified major protein beta-lactoglobulin (beta-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. Findings: We found that, for beta-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. (C) 2019 Elsevier Inc. All rights reserved.
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