Accession Number : ADA295944

Title :   Counterion Control Over the Barrier Properties of Bilayers Derived from Double-Chain Ionic Surfactants.

Descriptive Note : Final rept. 1 Jul 91-6 May 95,

Corporate Author : LEHIGH UNIV BETHLEHEM PA DEPT OF CHEMISTRY

Personal Author(s) : Regen, Steven L.

PDF Url : ADA295944

Report Date : 06 MAY 1995

Pagination or Media Count : 3

Abstract : Work that was carried out under this program demonstrated that a wide variety of amphiphilic ion pairs (i.e., ion-paired amphiphiles, IPA's) can function as novel membrane-forming materials. In a broad sense, this work has significantly expanded the scope of synthetic surfactants for use in the membrane area. The demonstration that ionically-paired single chain surfactants can produce bilayer structures is particularly significant because it bridges the gap between single- and double-chain amphiphiles in terms of molecular structure-aggregation activity relationships. In addition, the finding that counterions can play a major role in defining the permeability of surfactant bilayers highlights the fact that there is considerably more room for fine-tuning the barrier properties of resulting membranes than had previously been realized. jg p.3

Descriptors :   *LAYERS, *BARRIERS, *SURFACE ACTIVE SUBSTANCES, IONS, PERMEABILITY, MEMBRANES, MOLECULAR STRUCTURE, BRIDGES.

Subject Categories : Physical Chemistry
      Inorganic Chemistry
      Miscellaneous Materials
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE