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Author (up) Herrmann, L.; Kekicheff, P. openurl 
  Title Effect of Dissolved Polymer on the Elasticity and Plasticity of a Lyotropic Lamellar Mesophase Type Journal Article
  Year 2016 Publication Macromolecular Symposia Abbreviated Journal Macromol. Symp.  
  Volume 359 Issue 1 Pages 88-103  
  Keywords elastic constant; macromolecular and polymer solutions; smectic and lamellar phase; Surface Force Apparatus (SFA); surfactants and membranes  
  Abstract Using the Surface Force Apparatus (SFA) technique, direct force-distance measurements between mica surfaces immersed in a polymer-doped lamellar phase are presented. In the aqueous layers separating the charged and undulating bilayers of sodium dodecyl sulfate (SDS)/octanol, water is replaced by a polyethylene glycol aqueous solution (PEG, M-w similar to 20000 g/mol). As the mesophases align with the layers parallel to the solid mica surfaces the measurements yield structural information on the confined mesophases as well as bulk elastic properties. Keeping the membrane volume fraction constant the PEG dissolution results in a marked decrease in the elastic compressibility modulus, (B) over bar. This indicates a softening of the repulsive interactions between the lamellae mediated by polymer adsorption on the bilayers/aqueous solution interface. Insights into the behavior of the mesophases in confined geometries and thereby their stabilization mechanism are gained by noting a plastic contribution due to the presence of edge dislocations in the wedgelike confinement geometry.  
  Address [Herrmann, Laure; Kekicheff, Patrick] Univ Strasbourg, Inst Charles Sadron, CNRS, 23 Rue Loess,BP 84047, F-67034 Strasbourg 2, France, Email:  
  Corporate Author Thesis  
  Publisher Wiley-V C H Verlag Gmbh Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1022-1360 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000377290000011 Approved no  
  Call Number Admin @ benzerara @ Serial 14222  
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