Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8890908 | LWT - Food Science and Technology | 2018 | 28 Pages |
Abstract
Adding a small amount of secondary immiscible liquid (<1â¯g/100â¯g) to a suspension significantly alters rheological properties by creating a network of fluid bridges between particles or reinforcing an existing space-spanning network; these additional forces are termed capillary forces. Rheological properties of concentrated microgel suspensions are tunable by compositional and processing measures including solid content or particle size distribution; however, these approaches may lead to technical difficulties and further processing steps. This study aimed to test the effect of adding a small amount of oil on the rheological properties of fat-free fresh cheese, a water-continous concentrated suspension of dairy microgel particles. A significant increase of the low-shear viscosity (<1/s) and yield stress was observed by blending food-grade canola oil. Confocal scanning laser microscopy showed oil distribution between microgel particles and no apparent microstructural changes.
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Authors
Olga Fysun, Stefan Nöbel, Anisa Joy Loewen, Jörg Hinrichs,