Accession Number : ADA327213

Title :   Functionalized Nanoporous Polymer Membranes with Well-Defined Pore Architectures via Lyotropic Liquid-Crystalline Monomers.

Descriptive Note : Rept. for Jan 96-31 may 97,

Corporate Author : CALIFORNIA UNIV BERKELEY DEPT OF CHEMISTRY

Personal Author(s) : Gin, Douglas L.

PDF Url : ADA327213

Report Date : 30 JUN 1997

Pagination or Media Count : 10

Abstract : Highly ordered, nanoporous polymer membranes were synthesized using polymerizable lyotropic liquid crystals that self-assemble into the inverted hexagonal mesophase as building blocks. The resulting polymer networks contain nanometer-diameter, extended hydrophilic channels that are hexagonally close-packed. Two lyotropic liquid-crystalline monomer platforms have been synthesized. The interchannel separations in the polymerizable materials can be varied in the 30-40 A range by the choice of counterion on the ionic headgroup of the monomers. Highly oriented, monodomain thin films of these nanoporous polymers are possible via thermal processing of the liquid crystal mixtures prior to photopolymerization, which locks-in the ordered microstructure.

Descriptors :   *POLYMERS, *LIQUID CRYSTALS, *MONOMERS, *POROUS MATERIALS, NETWORKS, PROCESSING, PHASE, MIXTURES, MEMBRANES, SEPARATION, INVERSION, HEAT, CHANNELS, HYDROPHILIA.

Subject Categories : Polymer Chemistry
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE