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.

Report Date:

1995-05-06

Pagination or Media Count:

3.0

Abstract:

Work that was carried out under this program demonstrated that a wide variety of amphiphilic ion pairs i.e., ion-paired amphiphiles, IPAs 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