Viscoelasticity of Surfactant Monolayers

Jayalakshmi, Yalia; Ozanne, L.; Langévin, D.

doi:10.1006/jcis.1995.1113

Cited by 85 publications

(64 citation statements)

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“…According to the different set-ups, waves are naturally (thermally) or externally excited. This second method provides the best performance (27). However, for constitutional reasons, these methods suffer from poor sensitivity as the elasticity modulus increases, which is the normal situation at high frequencies.…”

Section: Introductionmentioning

confidence: 95%

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Measurement of the Surface Dilational Viscoelasticity of Adsorbed Layers with a Capillary Pressure Tensiometer

Liggieri

Attolini

Ferrari

et al. 2002

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 95%

“…For frequencies up to several hundred Hz two principal techniques seem to be effective: the surface light scattering (26,27) (SLS) and oscillating drop/bubble methods (28).…”

Section: Introductionmentioning

confidence: 99%

Measurement of the Surface Dilational Viscoelasticity of Adsorbed Layers with a Capillary Pressure Tensiometer

Liggieri

Attolini

Ferrari

et al. 2002

Journal of Colloid and Interface Science

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“…In the framework of a model for dilational viscoelasticity, adapted to the stepwise deformation mode, the real and imaginary parts of E can be obtained from the following relations [13]:…”

Section: Surface Dilational Viscoelasticitymentioning

confidence: 99%

Elastic Properties of Natural Sea Surface Films Incorporated with Solid Dust Particles: Model Baltic Sea Studies

Mazurek

Pogorzelski

2012

International Journal of Oceanography

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Floating dust-originated solid particles at air-water interfaces will interact with one another and disturb the smoothness of such a composite surface affecting its dilational elasticity. To quantify the effect, surface pressure (Π) versus film area (A) isotherm, and stress-relaxation (Π-time) measurements were performed for monoparticulate layers of the model hydrophobic material (of μm-diameter and differentiated hydrophobicity corresponding to the water contact angles (CA) ranging from 60 to 140• ) deposited at surfaces of surfactant-containing original seawater and were studied with a Langmuir trough system. The composite surface dilational modulus predicted from the theoretical approach, in which natural dust load signatures (particle number flux, daily deposition rate, and diameter spectra) originated from in situ field studies performed along Baltic Sea near-shore line stations, agreed well with the direct experimentally derived data. The presence of seawater surfactants affected wettability of the solid material which was evaluated with different CA techniques applicable to powdered samples. Surface energetics of the particlesubphase interactions was expressed in terms of the particle removal energy, contact cross-sectional areas, collapse energies, and so forth. The hydrophobic particles incorporation at a sea surface film structure increased the elasticity modulus by a factor K (1.29-1.58). The particle-covered seawater revealed a viscoelastic behavior with the characteristic relaxation times ranging from 2.6 to 68.5 sec.

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“…The method of measuring surface properties via capillary waves was used in a number of works when studying insoluble monolayers of surfactants and polyelectrolyte solutions (e.g., see [158][159][160][161][162]). …”

Section: Capillary Wavesmentioning

confidence: 99%

Methods of measuring rheological properties of interfacial layers (Experimental methods of 2D rheology)

2009

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-Current methods of studying the rheological properties of interfacial layers at the interfaces of fluids are reviewed. This area of research includes two-dimensional 2D rheology. Regardless of the similarities between the parameters of rheological properties of two-dimensional and bulk (three-dimensional) systems, when measuring surface properties, it is necessary to reformulate the main experimental methods to allow for the different dimensions of surface and bulk characteristics of material. Parameters of shear and dilational (measured upon expansion-compression) properties of interfacial layers are distinguished, and the latter are considered to be independent parameters of a system. The most attention was given to the rotational methods of measuring shear viscosity and the components of the complex 2D elastic modulus, as well as to measuring surface tension upon harmonic changes of the bubble (droplet) surface area, which allows characteristics of the dilational behavior of thin liquid films to be determined. Both groups of methods are widely used in laboratory practice and realized in the form of a number of original and commercial instruments. Dilational measurements of interfacial layers can also be performed with oscillations of a movable barrier on a Langmuir trough. In addition, methods based on the propagation of capillary waves across the surface of a liquid, as well as rarer methods of capillary flow in thin channels forced by either a surface tension gradient or the motion of the interface, are considered.

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Viscoelasticity of Surfactant Monolayers

Cited by 85 publications

References 0 publications

Measurement of the Surface Dilational Viscoelasticity of Adsorbed Layers with a Capillary Pressure Tensiometer

Measurement of the Surface Dilational Viscoelasticity of Adsorbed Layers with a Capillary Pressure Tensiometer

Elastic Properties of Natural Sea Surface Films Incorporated with Solid Dust Particles: Model Baltic Sea Studies

Methods of measuring rheological properties of interfacial layers (Experimental methods of 2D rheology)

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