Article (Scientific journals)
Competitive interfacial behavior in sodium caseinates-hydroxypropyl cellulose mixed systems
Cremer, Gilles; Van Hoed, Vera; Danthine, Sabine et al.
2023In Food Hydrocolloids, 137, p. 108427
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Keywords :
General Chemical Engineering; General Chemistry; Food Science
Abstract :
[en] In this work, interactions between hydroxypropyl cellulose (HPC) and sodium caseinates (Na-cas) at the air-water interface were studied. The surface tension, surface rheology, and film compatibility of the mixed protein/polysaccharide system were investigated. Tensiometry experiments showed that HPC is more surface-active than proteins, and is preferentially adsorbed at the interface. This molecule is able to migrate to the interface faster than Na-cas despite its larger size. At low HPC concentration, proteins adsorb first but HPC being more surface-active will eventually substitute them at the interface. The use of the pendant drop tensiometer allowed the real-time monitoring of protein displacement; an immediate decrease in surface tension was observed when HPC was added to a Na-cas solution. The analysis of the compression isotherms of Na-cas/HPC mixed films revealed partial miscibility between the two species within the monolayer; the films were less expanded than expected from the ideal behavior of binary mixtures. The dilatational rheology experiments showed that the presence of a very small amount of HPC had a significant effect on the viscoelastic properties of the interface. This work reported for the first time the competitive adsorption between Na-cas and HPC at the A/W interface.
Research center :
SMARTECH - Smart Technologies for Food and Biobased Products - ULiège
Puratos NV
Disciplines :
Food science
Author, co-author :
Cremer, Gilles  ;  Université de Liège - ULiège > Département GxABT > Smart Technologies for Food and Biobased Products (SMARTECH)
Van Hoed, Vera ;  Puratos NV
Danthine, Sabine  ;  Université de Liège - ULiège > TERRA Research Centre > Smart Technologies for Food and Biobased Products (SMARTECH)
Laveaux, Anne-Sophie;  Puratos NV
Blecker, Christophe ;  Université de Liège - ULiège > TERRA Research Centre > Smart Technologies for Food and Biobased Products (SMARTECH)
Language :
English
Title :
Competitive interfacial behavior in sodium caseinates-hydroxypropyl cellulose mixed systems
Alternative titles :
[fr] Comportement interfacial compétitif dans les systèmes mixtes caséinates de sodium-hydroxypropylcellulose
Publication date :
April 2023
Journal title :
Food Hydrocolloids
ISSN :
0268-005X
eISSN :
1873-7137
Publisher :
Elsevier BV
Volume :
137
Pages :
108427
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 29 December 2022

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