Simultaneous transport of water and organic molecules through polyelectrolyte membranes

Article Abstract:

Polyelectrolyte membranes (PEM) such as Nafion (Du pont) used as compartment separators in fuel cells and other electro-chemical applications are as interesting as perm selective diffusion barriers in protective fabrics. By means of sorption and permeation experiments in conjunction with molecular dynamics simulations, the permeability of Nafion membrane to water and hydrophilic solvents such as 1-propanol and dimethyl methylphosphonate are explored, focusing on the relationship between polymer structure, solvation and solvent diffusion.

ELECTRONIC & OTHER ELECTRIC EQUIPMENT, Fuel Cells & Thermic Generators, All Other Miscellaneous Electrical Equipment and Component Manufacturing, Cell membranes, Fuel cells

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Self-consistent field theory of polyelectrolyte systems

Article Abstract:

A self-consistent field theory is applied to inhomogeneous polyelectrolyte systems, for which the smeared and the annealed charge distributions, corresponding to strongly and weakly dissociating polymers, respectively are considered. The results for several systems, including the interface of a phase-separated polyelectrolyte solution in a poor solvent, the lamellar structures of symmetric diblock polyelectrolytes, and the phase behavior of polyelectrolyte blends are presented.

Polymers

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The structuring of nanoadsorbed and polyelectrolyte chains in the gap between a colloidal particle and plate

Article Abstract:

The force profiles between negatively charge silica and Titania surfaces in solutions containing additives of either rigid spherical nanoparticles or polyelectrolyte chains, also negatively charged, were measured using an atomic force microscope (AFM). The effects of various solution conditions on the nature of the measured force profiles were investigated.

Nanotechnology, Colloid chemistry

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