Surfactants, ionic polyelectrolyte gels

In the present work it was studied the dependence of analytical characteristics of the composite SG - polyelectrolyte films obtained by sol-gel technique on the content of non-ionic surfactant in initial sol. Triton X-100 and Tween 20 were examined as surfactants polystyrene sulfonate (PSS), polyvinyl-sulfonic acid (PVSA) or polydimethyl-ammonium chloride (PDMDA) were used as polyelectrolytes. The final films were applied as modificators of glass slides and pyrolytic graphite (PG) electrode surfaces. 

SILICA BASED THIN FILMS OBTAINED BY SOL-GEL TECHNOLOGY IN THE PRESENCE OF NON-IONIC SURFACTANTS AND MODIFIED WITH POLYELECTROLYTE... 

Low temperature sol-gel technology is promising approach for preparation of modified with organic molecules silica (SG) thin films. Such films are perspective as sensitive elements of optical sensors. Incorporation of polyelectrolytes into SG sol gives the possibility to obtain composite films with ion-exchange properties. The addition of non-ionic surfactants as template agents into SG sol results formation of ordered mechanically stable materials with tunable pore size. 

A detailed study of the structure of the aggregates of the ionic surfactants in polyelectrolyte networks was presented in Refs. [66,68]. The dynamics of the changes in the microenvironment of the fluorescent probe, pyrene, in slightly crosslinked networks of poly(diallyldimethylammonium bromide) (PDADMAB) during diffusion of sodium dodecyl sulfate (SDS) in the gel phase has been investigated by means of fluorescence spectroscopy. In Ref. [66], an analogous investigation was reported for complexes formal by the sodium salt of PMAA with cetyltrimethylammonium bromide (CTAB). 

Ionic microgel particles play an important part in studies of the phase transition, as we will learn in Sec. V. In cases of NIPA-based polymerization systems, submicron-sized polyelectrolyte gel particles can easily be prepared using the usual synthetic technique of aqueous redox polymerization. Different polymerization media were then employed surfactant-containing wa-... 

Highly Ordered Supramolecular Structures from Self-Assembly of Ionic Surfactants in Oppositely Charged Polyelectrolyte Gels... 

Polyelectrolyte gels with strong static potential also adsorb ionic sur ctant with opposite charge. Figure 3 shows the adsorption isotherms of die cationic surfactant, N-dodecylpyridinium chloride (C]2PyCl), on the anionic polymer gel, poly (2-acrylamide-2-methylpropanesulfonic acid) (PAMPS). This figure is compared with the corresponding linear polymer solution [38]. 

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