Title
Interfacial rheological properties of adsorbed protein layers and surfactants: A review
Author
Bos, M.A.
van Vliet, T.
Centraal Instituut voor Voedingsonderzoek TNO
Publication year
2001
Abstract
Proteins and low molecular weight (LMW) surfactants are widely used for the physical stabilisation of many emulsions and foam based food products. The formation and stabilisation of these emulsions and foams depend strongly on the interfacial properties of the proteins and the LMW surfactants. Therefore these properties have been studied extensively. In this review an overview is given of interfacial properties of proteins at a mesoscopic scale and the effect of LMW surfactants (emulsifiers) on them. Properties addressed are the adsorbed amount, surface tension (reduction), network formation at interfaces and possible conformational changes during and after adsorption. Special attention is given to interfacial rheological behaviour of proteins at expanding and compressing interfaces, which simulate the behaviour in real emulsions and foams. It will be illustrated that information on interfacial rheological properties, protein conformation and interactions between adsorbed molecules can be obtained by changing experimental conditions. The relation between interfacial rheology and emulsion and foam stabilisation is subsequently addressed. It is concluded that there is a need for new measuring devices that monitor several interfacial properties on a mesoscopic and microscopic scale at the same time, and for physical models describing the various processes of importance for proteins. Real progress will only be possible if both are combined in an innovative way. © 2001 Elsevier Science B.V. All rights reserved. Chemicals/CAS: Dietary Fats, Unsaturated; Excipients; Food Additives; Proteins; Surface-Active Agents; Water, 7732-18-5
Subject
Nutrition
Adsorption
Chemistry, Physical
Dietary Fats, Unsaturated
Excipients
Food Additives
Food Technology
Molecular Weight
Protein Conformation
Proteins
Rheology
Solubility
Stress, Mechanical
Surface Properties
Surface Tension
Surface-Active Agents
Viscosity
Water
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DOI
https://doi.org/10.1016/s0001-8686(00)00077-4
TNO identifier
72351
ISSN
0001-8686
Source
Advances in Colloid and Interface Science, 91 (3), 437-471
Document type
article