Recent advances in membrane-based separations include chiral separations, nanofiltration, ion-permselectivity, gas separation and pervaporation. Novel chiral separations using enzymes and chiral surfactants as carrier have been achieved using facilitated-transport membranes. Graft-copolymeric membranes have been constructed that possess pH-controlled ion selectivity, and membranes have been mad...

Transport through the ionomer as both a membrane and in catalyst layer is critical for efficient fuel-cell operation. To gain this understanding, we explore behavior of gas, water, ion transport membranes thin films using novel microelectrode interdigitated electrodes. In work, several common (including PFSA AEM chemistries) are evaluated custom cell to determine mass parameters hydrogen oxygen...

Advances in design of materials for solid oxide fuel cells, oxygen and hydrogen separation membranes, catalysts biofuel conversion into syngas are reviewed. Application new efficient techniques material synthesis characterization their atomic-scale structure, transport properties, reactivity allowed to develop types cathodes anodes asymmetric supported oxygen, membranes with high permeability s...

This review summarizes recent progress on dual-phase oxygen transport membranes. Existing challenges, research strategies and future application areas are discussed.

Introduction The facilitated transport of ions and polar molecules across biological membranes is essential for normal cell function and is also a major objective in the rapidly growing field of drug delivery. Researchers strive to simulate naturally occurring channel-forming proteins or carrier molecules. The resultant compounds may utilize endogenous peptide sequences or may be novel organic ...

Electrode potential measurements have been applied to study electrical characteristics like transport numbers, permselectivity & fixed charge density of ion-exchange membranes. Membrane potential measurements were made across zirconium phosphotungstate cation-exchange membrane maintained at 27◦C, using halide salts of alkali & alkaline earth metals as electrolytes. The effect of concentration o...

The ion transport activity of calix[4]arene tetrabutylamide 1,3-alt 2 was studied in liposomes, planar lipid bilayers, and HEK-293 cells. These experiments, when considered together with (1)H NMR and X-ray crystallography data, indicate that calix[4]arene tetrabutylamide 2 (1) forms ion channels in bilayer membranes, (2) mediates ion transport across cell membranes at positive holding potential...