Dilational surface visco-elasticity of polyelectrolyte/surfactant solutions: Formation of heterogeneous adsorption layers

Noskov, Boris A.; Loglio, G.; Miller, R.

doi:10.1016/j.cis.2011.02.010

Cited by 107 publications

(86 citation statements)

References 97 publications

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“…In fact, the plateau in the low-concentration range is similar to those found in other systems where similar effects are speculated, such as polyelectrolytes with opposite charged surfactants [33][34][35][36] or proteins with surfactants [37] and in particular what observed [38] for a similar cationic surfactants (DTAB) interacting with proteins (␤-casein).…”

Section: Effect Of Surfactant On the Sw Interfacial Propertiessupporting

confidence: 74%

Surfactant induced complex formation and their effects on the interfacial properties of seawater

Guzmán¹,

Santini²,

Benedetti³

et al. 2014

Colloids and Surfaces B: Biointerfaces

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Section: Effect Of Surfactant On the Sw Interfacial Propertiessupporting

confidence: 74%

Surfactant induced complex formation and their effects on the interfacial properties of seawater

Guzmán¹,

Santini²,

Benedetti³

et al. 2014

Colloids and Surfaces B: Biointerfaces

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“…However, one must consider that the kinetics of these processes is to each LMWS/protein combination (31). In contrast to the orogenic mechanism, Bykov et al suggested the formation of heterogeneous adsorption layers in the case of a polyelectrolyte and an LMWS (41,42).…”

Section: Dispersions Stabilised With Proteins Low-molecular-weight Smentioning

confidence: 99%

Interfacial rheology: An overview of measuring techniques and its role in dispersions and electrospinning

Pelipenko¹,

Kristl²,

Rošic³

et al. 2012

Acta Pharmaceutica

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Colloidal disperse systems represent the increasing number of modern delivery systems whose primary characteristic, a large interfacial area, causes thermodynamic instability. Therefore, the foremost challenge in dispersion design is the reduction of interface instability and an understanding of the behaviour of interfaces. Interfacial rheology is one of the most powerful tools for observing occurrences at the interphase. As previously mentioned, the stability of such systems is provided by the formation of a stable interfacial layer of surfactants around each dispersible particle. The stability of these systems can be improved by using more than one surfactant, but it must be kept in mind that different surfactants can have varying mechanisms of stabilisation, some of which can be mutually incompatible. Surfactant selection is therefore crucial and must be based on physicochemical properties, stability of the interfacial film, mobility of the molecules in the interfacial film, HLB, film formation kinetics, compatibility and interactions between molecules on the surface, CMC, etc. Interfacial rheological properties have yet to be thoroughly explored. Only recently, methods have been introduced that provide sufficient sensitivity to reliably determine viscoelastic interfacial properties. In general, interfacial rheology describes the relationship between the deformation of an interface and the stresses exerted on it.Due to the variety in deformations of the interfacial layer (shear and expansions or compressions), the field of interfacial rheology is divided into the subcategories of shear and dilatational rheology. While shear rheology is primarily linked to the long-term stability of dispersions, dilatational rheology provides information regarding short-term stability. Interfacial rheological characteristics become relevant in systems with large interfacial areas, such as emulsions and foams, and in processes that lead to a large increase in the interfacial area, such as electrospinning of nanofibers.

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“…In addition, the kinetic dependency of surface elasticity fluctuates between about 5 and 20 mN=m, showing the unstable state of the surface film. This instability of the surface film could be attributed to the approximate trends of adsorbing and desorbing for both C 16 TAB and CMCH molecules, which is caused by the small concentration gradient between the surface and the bulk in the case of very low C 16 charged C 16 TAB and CMCH molecules co-adsorb and associate into complexes in the surface layer. Obviously, the C 16 TAB molecules in the surface complexes tend to stretch their tails into the air phase and the polyelectrolyte molecules prefer to locate in the water phase since CMCH has almost no surface activity compared with C 16 TAB.…”

Section: Resultsmentioning

confidence: 93%

“…Recently, the dilational dynamic elasticity turns out to be sensitive to formation and structural transformation of the surface layer, and it is considered to be a good candidate for studying the surface kinetic behaviors of polymer=surfactant mixtures. [12][13][14][15][16][17][18][19] In this work, the dynamic surface elasticity and the surface pressure of CMCH=C 16 TAB were measured as a function of surface age and surfactant concentration by the oscillating drop method. The main aim of this work is to study the dilational surface rheology of CMCH=C 16 TAB adsorption layers and to realize the formation of the layers.…”

Section: Please Scroll Down For Articlementioning

confidence: 99%

Dynamic Surface Elasticity of Polyelectrolyte/Surfactant Adsorption Films at the Air/Water Interface: Carboxylmethylchitosan and Cetyltrimethylammonium Bromide

Jiang

Xie

et al. 2015

Journal of Dispersion Science and Technology

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The dynamic surface elasticity of the solution of carboxymethylchitosan (CMCH) and cetyltrimethylammonium bromide (C 16 TAB) was measured as a function of the surfactant concentration and the surface age by the oscillating drop method. The results showed that the surface layer of the CMCH/C 16 TAB solution transformed from loose to structured with the increase in the surfactant concentration. The surface elasticity versus the surface pressure curve during the adsorption showed different features at different surfactant concentration ranges, which was connected with the structural transformation of the surface layer. Our results show that the measurement of dynamic surface dilational properties is a powerful tool for studying the surface kinetics, which is helpful for dealing non-equilibrium systems in industry.

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Dilational surface visco-elasticity of polyelectrolyte/surfactant solutions: Formation of heterogeneous adsorption layers

Cited by 107 publications

References 97 publications

Surfactant induced complex formation and their effects on the interfacial properties of seawater

Surfactant induced complex formation and their effects on the interfacial properties of seawater

Interfacial rheology: An overview of measuring techniques and its role in dispersions and electrospinning

Dynamic Surface Elasticity of Polyelectrolyte/Surfactant Adsorption Films at the Air/Water Interface: Carboxylmethylchitosan and Cetyltrimethylammonium Bromide

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