Collagen-surfactant mixtures at fluid/fluid interfaces

2016 ◽  
Vol 509 ◽  
pp. 390-400 ◽  
Author(s):  
Aleksandra Kezwoń ◽  
Kamil Wojciechowski
Keyword(s):  
Fluid Interfaces ◽  
Surfactant Mixtures

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

2015 ◽  
Vol 2015 ◽  
pp. 1-17 ◽  
Author(s):  
Armando Maestro ◽  
Eva Santini ◽  
Dominika Zabiegaj ◽  
Sara Llamas ◽  
Francesca Ravera ◽  
...  
Keyword(s):  
Contact Angle ◽  
Equations Of State ◽  
Fluid Interfaces ◽  
Interfacial Behavior ◽  
Fluid Interface ◽  
Surfactant Mixtures ◽  
Interfacial Assembly ◽  
Shear Rheology ◽  
Properties Of Materials ◽  
Definition Of

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.

Towards understanding the behavior of polyelectrolyte–surfactant mixtures at the water/vapor interface closer to technologically-relevant conditions

2018 ◽  
Vol 20 (3) ◽  
pp. 1395-1407 ◽  
Author(s):  
Sara Llamas ◽  
Laura Fernández-Peña ◽  
Andrew Akanno ◽  
Eduardo Guzmán ◽  
Víctor Ortega ◽  
...  
Keyword(s):  
Water Vapor ◽  
Neutron Reflectometry ◽  
Fluid Interfaces ◽  
Surfactant Mixtures ◽  
Vapor Interface ◽  
Surface Tensiometry

The adsorption of technologically relevant polyelectrolyte–surfactant mixtures at fluid interfaces was studied by neutron reflectometry and surface tensiometry.

scholarly journals Kinetics of Surfactant Adsorption at Fluid−Fluid Interfaces:  Surfactant Mixtures

Langmuir ◽  
1999 ◽  
Vol 15 (10) ◽  
pp. 3574-3581 ◽  
Author(s):  
Gil Ariel ◽  
Haim Diamant ◽  
David Andelman
Keyword(s):  
Fluid Interfaces ◽  
Surfactant Adsorption ◽  
Surfactant Mixtures ◽  
Kinetics Of

Phase behavior of cationic and anionic surfactants at low concentrations

1992 ◽  
Vol 50 (1) ◽  
pp. 694-695
Author(s):  
E. Naranjo
Keyword(s):  
Phase Behavior ◽  
Structural Characterization ◽  
Dynamic Systems ◽  
Anionic Surfactants ◽  
Intermolecular Forces ◽  
Stable Form ◽  
Surfactant Mixtures ◽  
Low Concentrations ◽  
Cationic And Anionic Surfactants ◽  
General Method

Equilibrium vesicles, those which are the stable form of aggregation and form spontaneously on mixing surfactant with water, have never been demonstrated in single component bilayers and only rarely in lipid or surfactant mixtures. Designing a simple and general method for producing spontaneous and stable vesicles depends on a better understanding of the thermodynamics of aggregation, the interplay of intermolecular forces in surfactants, and an efficient way of doing structural characterization in dynamic systems.

Solubilization of Itraconazole by Surfactants and Phospholipid-Surfactant Mixtures: Interplay of Amphiphile Structure, pH and Electrostatic Interactions

2020 ◽  
Author(s):  
Zahari Vinarov ◽  
Gabriela Gancheva ◽  
Nikola Burdzhiev ◽  
Slavka S. Tcholakova
Keyword(s):  
Nmr Spectroscopy ◽  
Electrostatic Interactions ◽  
Triazole Ring ◽  
Water Soluble ◽  
Single Chain ◽  
Surfactant Mixtures ◽  
Solubilization Capacity ◽  
Water Soluble Drugs ◽  
Hydrophobic Chain ◽  
Brick Dust

Although surfactants are frequently used in enabling formulations of poorly water-soluble drugs, the link between their structure and drug solubilization capacity is still unclear. We studied the solubilization of the “brick-dust” molecule itraconazole by 16 surfactants and 3 phospholipid:surfactant mixtures. NMR spectroscopy was used to study in more details the drug-surfactant interactions. Very high solubility of itraconazole (up to 3.6 g/L) was measured in anionic surfactant micelles at pH = 3, due to electrostatic attraction between the oppositely charged (at this pH) drug and surfactant molecules. <sup>1</sup>H NMR spectroscopy showed that itraconazole is ionized at two sites (2+ charge) at these conditions: in the phenoxy-linked piperazine nitrogen and in the dioxolane-linked triazole ring. The increase of amphiphile hydrophobic chain length had a markedly different effect, depending on the amphiphile type: the solubilization capacity of single-chain surfactants increased, whereas a decrease was observed for double-chained surfactants (phosphatidylglycerols). The excellent correlation between the chain melting temperatures of phosphatidylglycerols and itraconazole solubilization illustrated the importance of hydrophobic chain mobility. This study provides rules for selection of itraconazole solubilizers among classical single-chain surfactants and phospholipids. The basic physics underpinning the described effects suggests that these rules should be transferrable to other “brick-dust” molecules.

scholarly journals Surfactant Adsorption to Different Fluid Interfaces

Langmuir ◽  
2021 ◽  
Author(s):  
Jotam Bergfreund ◽  
Sarina Siegenthaler ◽  
Viviane Lutz-Bueno ◽  
Pascal Bertsch ◽  
Peter Fischer
Keyword(s):  
Fluid Interfaces ◽  
Surfactant Adsorption

Impact of the Degree of Ethoxylation of the Ethoxylated Polysorbate Nonionic Surfactant on the Surface Self-Assembly of Hydrophobin-Ethoxylated Polysorbate Surfactant Mixtures

Langmuir ◽  
2014 ◽  
Vol 30 (32) ◽  
pp. 9741-9751 ◽  
Author(s):  
Jeffrey Penfold ◽  
Robert K. Thomas ◽  
Peixun Li ◽  
Jordan T. Petkov ◽  
Ian Tucker ◽  
...  
Keyword(s):  
Nonionic Surfactant ◽  
Self Assembly ◽  
Surfactant Mixtures

scholarly journals Proteins from microalgae for the stabilization of fluid interfaces, emulsions, and foams

2021 ◽  
Vol 108 ◽  
pp. 326-342
Author(s):  
Pascal Bertsch ◽  
Lukas Böcker ◽  
Alexander Mathys ◽  
Peter Fischer
Keyword(s):  
Fluid Interfaces
Sign in / Sign up

Export Citation Format

Share Document