Rheological response of whey protein deposits forming under shear in concentrated conditions

IF 3 3区工程技术 Q2 MECHANICS

Rheologica Acta Pub Date : 2025-12-20 DOI:10.1007/s00397-025-01534-7

Margot Grostete, Jeehyun Lee, Françoise Boissel, Maude Jimenez, Romain Jeantet, Luca Lanotte

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引用次数: 0

Abstract

Dairy fouling consists in the accumulation of whey proteins and minerals on equipment walls. While heat-induced protein denaturation is a primary cause, fouling also occurs below the denaturation threshold (≈ 70 °C). This leads to a renewed interest in other driving forces influencing fouling mechanisms. In this wake, this study investigates the role of shear on the formation of whey protein deposits under sub-denaturation temperature and concentrated conditions. We compared morphology and rheological behavior of shear-induced and unsheared structures formed at 15 and 20 wt% protein concentrations. While unsheared gel-like deposits were compact and stiff, shear led to the formation of weaker, more porous, and highly crosslinked structures. This effect was more pronounced at higher concentrations, where shear counteracted heat-induced aggregation, resulting in an alternative structural organization. These findings provide new insights not only into whey protein gelation but also into dairy fouling mechanisms, highlighting a concentration-dependent shear effect.

Graphical Abstract

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浓缩条件下剪切形成的乳清蛋白沉积物的流变响应

乳制品污染包括乳清蛋白和矿物质在设备壁上的积累。虽然热诱导的蛋白质变性是主要原因，但低于变性阈值（≈70°C）也会发生污垢。这导致了对影响污垢机制的其他驱动力的重新关注。因此，本研究探讨了在亚变性温度和浓缩条件下剪切对乳清蛋白沉积形成的作用。我们比较了在15%和20%的蛋白质浓度下形成的剪切诱导和未剪切结构的形态学和流变学行为。未剪切的凝胶状沉积物致密而坚硬，而剪切导致形成更弱、更多孔、高度交联的结构。这种效应在较高浓度下更为明显，剪切抵消了热诱导的聚集，导致另一种结构组织。这些发现不仅为乳清蛋白凝胶化提供了新的见解，也为乳制品污染机制提供了新的见解，强调了浓度依赖性剪切效应。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Rheologica Acta 物理-力学

CiteScore

4.60

自引率

8.70%

发文量

审稿时长

3 months

期刊介绍： "Rheologica Acta is the official journal of The European Society of Rheology. The aim of the journal is to advance the science of rheology, by publishing high quality peer reviewed articles, invited reviews and peer reviewed short communications. The Scope of Rheologica Acta includes: - Advances in rheometrical and rheo-physical techniques, rheo-optics, microrheology - Rheology of soft matter systems, including polymer melts and solutions, colloidal dispersions, cement, ceramics, glasses, gels, emulsions, surfactant systems, liquid crystals, biomaterials and food. - Rheology of Solids, chemo-rheology - Electro and magnetorheology - Theory of rheology - Non-Newtonian fluid mechanics, complex fluids in microfluidic devices and flow instabilities - Interfacial rheology Rheologica Acta aims to publish papers which represent a substantial advance in the field, mere data reports or incremental work will not be considered. Priority will be given to papers that are methodological in nature and are beneficial to a wide range of material classes. It should also be noted that the list of topics given above is meant to be representative, not exhaustive. The editors welcome feedback on the journal and suggestions for reviews and comments."