Gel-surfactant complexes

A surprising result was obtained for both cationic gel-anionic surfactant systems The metal-containing samples appear not less ordered than the initial polyelectrolyte gel-surfactant complexes despite the diminished amplitudes of the peaks. For the PDADMACl-SDBS system, the average distance between... 

As can be seen from the discussion above, the polyelectrolyte gel-surfactant complexes present interesting hybrid metal-polymer nanocomposites, allowing a vast variety of incorporated metals and metal-polymer-surfactant structures. The limitations of these systems are their heterogeneous character (insoluble in any media) and excessive sensitivity to external parameters (pH, temperature, etc.). 

C. Monteux, C.E. WiUiams, J. Meunier, O. Anthony, and V. Bergeron Adsorption of Oppositely Charged Polyelectrolyte/Surfactant Complexes at the Air/Water Interface Formation of Interfacial Gels. Langmuir 20, 57 (2004). 

The investigation of the collapse phenomenon have shown that the topological structure of the network plays an essential role in the process of gel collapse [42, 43]. In order to check the influence of the topology of a network on the equilibrium properties of the network-surfactant complexes, a set of experiments with gels differing in the number of crosslinks or in the conditions of synthesis have been performed. It has been shown that tie decrease of crosslink density or concentration of monomers in the polymerization mixture results in a sharper gel collapse. 

In the field of research methods probably the most important application of protein surfactant complexation is in the technique of polyacrylamide gel electrophoresis in the presence of SDS, the so-called SDS-PAGE technique, used for the analysis and estimation of molecular masses of protein subunits [22], Protein subunit-SDS complexes are formed from proteins reduced by /3-mercaptoethanol to remove disulphide bonds. The binding of SDS to the polypeptide chains oc-... 

Olga E. Philippova s main research interests are polyelearolyte and ionomer behavior of polymer gels, linear and cross-linked polyelectrolytes with associating hydrophobic groups, polymer gel/surfactant interactions, interpolymer complexes, and polymer gels with entrapp l linear stiff-chain macromolecules. 

Route C mobilizes routes A and B to combine complex precursor systems (aerosol cocktails) in different ratios and yield multifunctional materials with hierarchically structured porosity [18-21]. For instance, latex beads can be combined with a diluted sol-gel surfactant dispersion that contains small inorganic nanoparticles of metallic oxides, metals, and so on. This approach then leack by EISA to micrometer-sized porous spheres with an independent control of dimensions at four levels of size. 

The formation of these DNA gel particles constitutes an example of strong associative phase separation. An indication of the strength of this interaction is the formation of a stronger film (or skin) constituted by the polyelectrolyte-surfactant complex. Preliminary results of S AXS measurements have supported the existence of an ordered structure formed on the hydrated skin of the obtained particles. SEM images of the cross-section of the particles have given evidence for the existence of a shell structure, its formation being more pronounced in the case of ss-DNA. The capsule shells obtained may be considered as physical networks in which surfactant micelles form polycationic-multianionic electrostatic complexes as crosslink points. 

Interactions between polymers and surfactants have been widely investigated in the recent decades. The interaction may lead to a polymer-surfactant complex formation, which may have a significant influence on the system properties e.g. emulsification, colloidal stability, viscosity enhancement, gel formation, solubilization, and phase separation [Goddard 1993a Goddard 2002]. The properties and structure of surfactant-polymer complexes depend on the molecular characteristics of both the polymer and surfactant [Lindman Thalberg,... 

The aim of the present work was optimization of synthesis of SG -polymeric cation exchanger composite films by sol-gel technology in the presence of non-ionic surfactants and their application for detenuination of Zn (II) as phenanthrolinate (Phen) complex. 

The synergism of surfactant-polymer complex formation has been studied by gel permeation chromatography [114],... 

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