Interfacial rheology of model water-air microgels laden interfaces: effect of cross-linking - Université de Bordeaux Accéder directement au contenu
Article Dans Une Revue Journal of Colloid and Interface Science Année : 2022

Interfacial rheology of model water-air microgels laden interfaces: effect of cross-linking

Résumé

Hypothesis The mechanical properties of model air/water interfaces covered by poly(Nisopropylacrylamide) microgels depend on the microgels deformability or in other words on the amount of cross-linker added during synthesis. Experiments The study is carried out by measuring the apparent dilational, the compression and the shear moduli using three complementary methods: 1) the pendant drop method with perturbative areas, 2) the Langmuir trough compression, and 3) shear rheology using a double wall ring cell mounted onto a Langmuir through. Findings In the range of surface coverages studied, the interfaces exhibit a solid-like behavior and elasticity goes through a maximum as a function of the surface pressure. This is observable whatever the investigation method. This maximum elasticity depends on the microgel deformability: the softer the microgels the higher the value of the moduli. The mechanical behavior of model interfaces is discussed, taking into account the core-shell structure of the particles and their packing at the interface.
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Dates et versions

hal-03776340 , version 1 (13-09-2022)

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Marie-Charlotte Tatry, Eric Laurichesse, Jan Vermant, Valérie Ravaine, Véronique Schmitt. Interfacial rheology of model water-air microgels laden interfaces: effect of cross-linking. Journal of Colloid and Interface Science, inPress, ⟨10.1016/j.jcis.2022.08.157⟩. ⟨hal-03776340⟩
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