Effect of a neutral water-soluble polymer on the lamellar phase of a zwitterionic surfactant system.

  title={Effect of a neutral water-soluble polymer on the lamellar phase of a zwitterionic surfactant system.},
  author={Amir Maldonado and Ricardo L{\'o}pez-Esparza and Raymond Ober and Thadd{\'e}e Gulik-Krzywicki and Wladimir Urbach and Claudine E. Williams},
  journal={Journal of colloid and interface science},
  volume={296 1},
We have studied the effect of adding a water-soluble polymers (PEG) to the lamellar phases of the ternary system tetradecyldimethylaminoxide (C14DMAO)-hexanol-water. The results of Freeze-Fracture Electron Microscopy (FFEM) and Small Angle X-ray Scattering (SAXS) experiments show that the addition of the polymer induces the spontaneous formation of highly monodisperse multilayered vesicles above a threshold polymer concentration. 
13 Citations
Confinement of a hydrophilic polymer in membrane lyotropic phases.
Self-diffusion experiments performed in the lyotropic sponge (L(3)) phase show that the polymer adsorbs onto the surfactant membranes, explaining earlier observations: high polymer concentrations decrease the Gaussian rigidity of the membranes and a vesicular phase is stabilized. Expand
Effect of Dimethyl Sulfoxide on the Lamellar Phase of a Zwitterionic Surfactant
We study the effect of dimethyl sulfoxide, a solvent used in biological applications, on the lamellar phases of a zwitterionic surfactant. We used solutions with different proportions of dimethylExpand
Topology change by screening the electrostatic interactions in a polymer–surfactant system
We show that a neutral polymer (PEG) induces a topology transition of the bilayers of an ionic surfactant system (SDS–hexanol–brine), provided that the electrostatic interactions between membranesExpand
Rheology of the Sponge Phase of the SDS–Hexanol–Brine System
We have studied the rheological properties of the sponge phases (or L3) of the sodium dodecyl sulfate (SDS)–hexanol–brine (NaCl 20 g/l) system at different bilayer volume fractions. The mostExpand
Vesicles Formation by Zwitterionic Micelle and Poly-L-lysine: Solvation and Rotational Relaxation Study.
It was observed that the hydration nature around the headgroup regions of SB-16/PLL vesicular system is higher than the head group regions of micellar system, which means that PLL permits more water molecules in the head Group regions of vesicle system. Expand
Effect of polymer on the elasticity of surfactant membranes: a light scattering study.
Results suggest that the polymer penetrates to some extent the surfactant bilayers, a behavior opposite to that expected from available models for the interaction between fluid membranes and adsorbing polymers. Expand
Effect of Hydrophobic Modification on the Properties of Polymer‐Blended Microemulsion Gels
Phase behavior of sodium oleate (NaOl)/isoamyl alcohol-based lamellar gel phase in cedar oil/water medium in the presence of the nonionic polymer hydroxyethyl cellulose (HEC) and its hydrophobicExpand
Polymer and Colloidal Inclusions in Lyotropic Lamellar and Hexagonal Surfactant Mesophases
Abstract Introduction of colloidal particles or polymers as inclusions into lyotropic surfactant mesophases influences mesophase stability and structure. Such mesophase/inclusion composites haveExpand
Interaction between poly(ethylene glycol) and two surfactants investigated by diffusion coefficient measurements.
Dynamic light scattering (DLS) and fluorescence recovery after pattern photobleaching (FRAPP) were used to study the interaction of low molecular weight poly(ethylene glycol) (PEG) with micelles ofExpand
An HII liquid crystal-based delivery system for cyclosporin A: physical characterization.
In the present study we demonstrate that large quantities of cyclosporin A and three dermal penetration enhancers (phosphatidylcholine, ethanol, or Labrasol) can be solubilized into reverse hexagonalExpand


Softening of the interactions between surfactant bilayers in a lamellar phase due to the presence of a polymer
Abstract:The compressibility modulus of a lamellar phase containing a neutral polymer guest molecule was measured directly using a surface force apparatus. The system studied consisted of sodiumExpand
Experimental results for the L3 phase in a zwitterionic surfactant system and their implications regarding structures
Conditions for existence of the L3 phase have been determined for a system containing water, n-hexanol, and the zwitterionic surfactant n-tetradecyldimethylamineoxide. Electric birefringence,Expand
Polymer-mediated interactions of fluid membranes in a lyotropic lamellar phase: a small angle X-ray and neutron scattering study
Abstract:Small angle X-ray and neutron scattering data on an effective three-component lamellar phase composed of water, a non adsorbing water-soluble polymer (polyvynilpyrolidone), fluid membranes,Expand
Experimental study of a lyotropic lamellar phase swollen with polymer solutions
We report on the effect of a hydrosoluble neutral polymer on the stability of a lamellar phase made of charged surfactant bilayers. In the system investigated, the smectic structure exists for a wideExpand
Polymer induced phase separation in lyotropic smectics.
Large water soluble macromolecules can be confined in all proportions into 'an electrostatically stabilized surfactant lamellar phase without change of the bilayer thickness. Upon progressiveExpand
Polymers in lyotropic liquid crystals
Abstract Polymers can be incorporated into lamellar liquid crystalline systems without the phenomena of macroscopic phase separation occurring. By playing with the inter-membrane interactions and theExpand
Interactions between the non-ionic surfactant C12E5 and poly(ethylene oxide) studied using dynamic light scattering and fluorescence quenching
Dynamic light scattering measurements have been made to elucidate changes in the coil conformation of a high molecular weight poly(ethylene oxide) (PEO) fraction when the non-ionic surfactant C12E5...
Polymer–surfactant and protein–surfactant interactions
The phase behavior and some physicochemical properties of homopolymers (HP) and hydrophobically modified (HMP) polymers, as well as of polyelectrolytes (PE) and proteins (PR), in the presence ofExpand
Poly(ethylene glycol)-induced and temperature-dependent phase separation in fluid binary phospholipid membranes.
The results indicate that PEG-induced dehydration of liposomal membranes provides the driving force for the segregation of the pyrene lipid. Expand
Lamellar Biogels: Fluid-Membrane-Based Hydrogels Containing Polymer Lipids
A defining signature of the Lα,g regime as it sets in from the fluid lamellar Lα phase is the proliferation of layer-dislocation-type defects, which are stabilized by the segregation of PEG-lipids to the defect regions of high membrane curvature that connect the membranes. Expand