Effect of organic additives on formation and structure of polyelectrolyte‐oppositely charged surfactant complexes

Abstract

Effect of butanol and Triton X-100 on formation, supramolecular organization and local dynamics of poly(N-ethyl-4-vinylpyridinium)-dodecyl sulfate complexes have been studied by UV spectroscopy, high-speed sedimentation, laser light scattering and electron spin resonance (ESR) spectroscopy. It was found that solubilization of butanol promotes aggregation of the complex species in solution and results in contraction of the region in which water-soluble complexes are formed. On the contrary, highly aggregated complexes disaggregate up to molecularly dispersed state upon addition of Triton X-100. It was found that under the experimental conditions neither butanol (up to 3 wt%) nor Triton X-100 ([Triton X-100]/[sodium dodecylsulfate] £ 1:1) cause destruction of the complexes. The results of ESR spin probe and spin label studies show that in both cases supramolecular realignments are accompanied by a slight increase of the local molecular mobility of surfactant ions in the complex micelles, segmental mobility of polyelectrolyte being unchanged.

ESR Spectroscopy of Multiphase Polymer Systems

“…Besides chemically crosslinked polymers (covalent network), a number of papers deal with physically crosslinked polyelectrolyte networks as well as spin probed polyelectrolytes and ionic/nonionic surfactants in solution [72][73][74][75][76][77][78][79]. However, these studies are beyond the scope of this review.…”

Interactions between sodium polyacrylate and mixed surfactants of polyoxyethylene tert-octyl phenyl ether and dodecyltrimethylammonium bromide

“…[18][19][20][22][23][24][26][27][28][29]32,33 It was found in those studies that the polyelectrolyte/surfactant interactions and the phase behavior were mainly determined by the ionic strength and the composition of the mixed surfactants, not by the concentration of polymer or total surfactant. Many different techniques have been used to study the interactions and phase behavior of polymer/mixed surfactants systems, such as ultraltration, 20 turbidimetric, [18][19][20][21][22]24,26,28,[31][32][33][34] light scattering (QELS), 19,20,[23][24][25][26][27][28][31][32][33]35 potentiomeric titration, 22 calorimetry, 29,36 deuterium NMR spectroscopy, 30 electrophoresis, [31][32][33][34] uorescence, 34 electron spin resonance (ESR), 35 and electron microscopy. 36 Isothermal t...…”

“…Interactions between the polyelectrolyte and mixed surfactants have also been studied, [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] most of which involved the system of poly(diallyldimethylammonium chloride) (PDDAC) and mixed surfactants of polyoxyethylene tert-octyl phenyl ether (TX100) and sodium dodecyl sulfate (SDS). [18][19][20][22][23][24][26][27][28][29]32,33 It was found in those studies that the polyelectrolyte/surfactant interactions and the phase behavior were mainly determined by the ionic strength and the composition of the mixed surfactants, not by the concentration of polymer or total surfactant.…”

Complex Coacervation of Polyelectrolytes Studied by Spin‐Label EPR Spectroscopy

“…Spin‐probe studies of Hinderberger et al are focused on polyion–counterion interactions. The spin‐probe technique has been also applied to study various polyelectrolyte‐surfactant complexes …”