Surface dilational moduli of latex-particle monolayers spread at air–water interface

Kobayashi, Toshio; Kawaguchi, Masami

doi:10.1016/j.jcis.2012.09.050

Cited by 21 publications

(22 citation statements)

References 22 publications

(26 reference statements)

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“…In this case, the rheological response is strongly dependent on the region of the 2D phase diagram analyzed [18,120]. was found to be larger than along the entire phase diagram of the system, and the behavior was independent of the strain rate for experiments performed at fixed frequencies [121]. A small hysteresis, associated with the loss connection between the particles, was found for these systems.…”

Section: Dilational Rheologymentioning

confidence: 80%

Particle and Particle-Surfactant Mixtures at Fluid Interfaces: Assembly, Morphology, and Rheological Description

Maestro

Santini

Zabiegaj

et al. 2015

Advances in Condensed Matter Physics

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We report here a review of particle-laden interfaces. We discuss the importance of the particle’s wettability, accounted for by the definition of a contact angle, on the attachment of particles to the fluid interface and how the contact angle is strongly affected by several physicochemical parameters. The different mechanisms of interfacial assembly are also addressed, being the adsorption and spreading the most widely used processes leading to the well-known adsorbed and spread layers, respectively. The different steps involved in the adsorption of the particles and the particle-surfactant mixtures from bulk to the interface are also discussed. We also include here the different equations of state provided so far to explain the interfacial behavior of the nanoparticles. Finally, we discuss the mechanical properties of the interfacial particle layers via dilatational and shear rheology. We emphasize along that section the importance of the shear rheology to know the intrinsic morphology of such particulate system and to understand how the flow-field-dependent evolution of the interfacial morphology might eventually affect some properties of materials such as foams and emulsions. We dedicated the last section to explaining the importance of the particulate interfacial systems in the stabilization of foams and emulsions.

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Section: Dilational Rheologymentioning

confidence: 80%

Particle and Particle-Surfactant Mixtures at Fluid Interfaces: Assembly, Morphology, and Rheological Description

Maestro

Santini

Zabiegaj

et al. 2015

Advances in Condensed Matter Physics

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“…If local equilibrium is assumed, then the system should exhibit reversible dynamics in the compression/expansion cycles. In particular, the experiments carried out by Hilles et al (2007) show that the oscillatory motions of the barriers lead to hysteresis cycles, whose area increases with the strain amplitude; see also the experimental results by Kato and Kawaguchi (2012) and Kobayashi and Kawaguchi (2013). This irreversible behavior is sometimes attributed to non-equilibrium effects related to physico-chemical properties of the surfactant, like for example phase-changes in the monolayer.…”

Section: Introductionmentioning

confidence: 89%

“…Equations (25)-(27) apply in the limit co ~ 1, which is relevant in some experimental runs (Kato andKawaguchi 2012, Kobayashi andKawaguchi 2013) and will be pursued elsewhere. Here, instead, we further simplify these equations, concentrating in the limit ««1,…”

Section: /|~«L 2 /5««~m-(3dmentioning

confidence: 99%

Nonlinear dynamics in experimental devices with compressed/expanded surfactant monolayers

Higuera¹,

Perales²,

Vega³

2014

Fluid Dyn. Res.

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A theory is provided for a common experimental set up that is used to measure surface properties in surfactant monolayers. The set up consists of a surfactant monolayer (over a shallow liquid layer) that is compressed/expanded in a periodic fashion by moving in counter-phase two parallel, slightly immersed solid barriers, which vary the free surface area and thus the surfactant concentration. The simplest theory ignores the fluid dynamics in the bulk fluid, assuming spatially uniform surfactant concentration, which requires quite small forcing frequencies and provides reversible dynamics in the compression/expansion cycles. In this paper, we present a long-wave theory for not so slow oscillations that assumes local equilibrium but takes the fluid dynamics into account. This simple theory uncovers the physical mechanisms involved in the surfactant behavior and allows for extracting more information from each experimental run. The conclusion is that the fluid dynamics cannot be ignored, and that some irreversible dynamics could well have a fluid dynamic origin.

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“…However, above a threshold value of the interfacial coverage, a steep decrease of the viscoelastic moduli occurs due to the possible distortion of the quasi-2D layer, appearing as the buckling of the monolayer. Such systems present a transition between a fluid-like behavior to a solid-like behaviour with the densification of the interface [69,139,140]. Therefore, we assume that the dilational rheological response is strongly dependent on the specific region of the phase diagram under study [73].…”

Section: Dilational Rheologymentioning

confidence: 99%

“…Therefore, we assume that the dilational rheological response is strongly dependent on the specific region of the phase diagram under study [73]. For polymeric particles, the storage modulus was higher than the loss modulus within the entire interfacial coverage range, with this behavior being independent on the stain rate [139]. For low interfacial densities, the elastic component increases with the interfacial coverage due to the presence of repulsive interactions.…”

Section: Dilational Rheologymentioning

confidence: 99%

Colloids at Fluid Interfaces

Maestro

Guzmán

2019

Processes

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Over the last two decades, understanding of the attachment of colloids to fluid interfaces has attracted the interest of researchers from different fields. This is explained by considering the ubiquity of colloidal and interfacial systems in nature and technology. However, to date, the control and tuning of the assembly of colloids at fluid interfaces remain a challenge. This review discusses some of the most fundamental aspects governing the organization of colloidal objects at fluid interfaces, paying special attention to spherical particles. This requires a description of different physicochemical aspects, from the driving force involved in the assembly to its thermodynamic description, and from the interactions involved in the assembly to the dynamics and rheological behavior of particle-laden interfaces.

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Surface dilational moduli of latex-particle monolayers spread at air–water interface

Cited by 21 publications

References 22 publications

Particle and Particle-Surfactant Mixtures at Fluid Interfaces: Assembly, Morphology, and Rheological Description

Particle and Particle-Surfactant Mixtures at Fluid Interfaces: Assembly, Morphology, and Rheological Description

Nonlinear dynamics in experimental devices with compressed/expanded surfactant monolayers

Colloids at Fluid Interfaces

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