Interfacial protein adsorption behavior can be connected across a wide range of timescales using the microfluidic EDGE (Edge-based droplet GEneration) tensiometer - Biopolymères Interactions Assemblages
Journal Articles Journal of Colloid and Interface Science Year : 2024

Interfacial protein adsorption behavior can be connected across a wide range of timescales using the microfluidic EDGE (Edge-based droplet GEneration) tensiometer

Abstract

Hypothesis: Our hypothesis is that dynamic interfacial tension values as measured by the partitioned-Edge-based Droplet GEneration (EDGE) tensiometry can be connected to those obtained with classical techniques, such as the automated drop tensiometer (ADT), expanding the range of timescales towards very short ones. Experiments: Oil-water and air–water interfaces are studied, with whey protein isolate solutions (WPI, 2.5 – 10 wt %) as the continuous phase. The dispersed phase consists of pure hexadecane or air. The EDGE tensiometer and ADT are used to measure the interfacial (surface) tension at various timescales. A comparative assessment is carried out to identify differences between protein concentrations as well as between oil–water and air–water interfaces. Findings: The EDGE tensiometer can measure at timescales down to a few milliseconds and up to around 10 s, while the ADT provides dynamic interfacial tension values after at least one second from droplet injection and typically is used to also cover hours. The interfacial tension values measured with both techniques exhibit overlap, implying that the techniques provide consistent and complementary information. Unlike the ADT, the EDGE tensiometer distinguishes differences in protein adsorption dynamics at protein concentrations as high as 10 wt% (which is the highest concentration tested) at both oil–water and air–water interfaces.
Fichier principal
Vignette du fichier
2024_Porto-Santos_J.Coll.Interf.Sci..pdf (2.11 Mo) Télécharger le fichier
Origin Publisher files allowed on an open archive
licence

Dates and versions

hal-04698280 , version 1 (16-09-2024)

Licence

Identifiers

Cite

Tatiana Porto Santos, Boxin Deng, Meinou Corstens, Claire Berton-Carabin, Karin Schroën. Interfacial protein adsorption behavior can be connected across a wide range of timescales using the microfluidic EDGE (Edge-based droplet GEneration) tensiometer. Journal of Colloid and Interface Science, 2024, 674, pp.951-958. ⟨10.1016/j.jcis.2024.06.200⟩. ⟨hal-04698280⟩
171 View
1 Download

Altmetric

Share

More