Relating Uncharged Solute Retention of Polyelectrolyte Multilayer Nanofiltration Membranes to Effective Structural Properties

Pharmaceutical retention mechanisms by nanofiltration membranes.

This study investigates the retention mechanisms of three pharmaceuticals-sulfamethoxazole, carbamazepine, and ibuprofen-by nanofiltration (NF) membranes. Laboratory-scale experiments were carried out with two well-characterized NF membranes, with the goal of relating pharmaceutical retention behavior to membrane characteristics, physicochemical properties of the pharmaceutical molecules, and s...

Nanofiltration membranes

Ion Rejection Properties of Nanofiltration Membranes with Inhomogeneous Charge Distributions

Ion rejection by nanofiltration (NF) membranes with bipolar fixed charge distributions have been investigated theoretically. Salt flux rectification has been predicted as a result of the broken symmetry of the fixed charge distribution on the pore walls. The existence of an optimal volume flux (i.e. leading to the highest salt rejection) has been put in evidence when there is a region within th...

Elasticity of polyelectrolyte multilayer microcapsules.

We present a novel approach to probe elastic properties of polyelectrolyte multilayer microcapsules. The method is based on measurements of the capsule load-deformation curves with the atomic force microscope. The experiment suggests that at low applied load deformations of the capsule shell are elastic. Using elastic theory of membranes we relate force, deformation, elastic moduli, and charact...

nanofiltration membranes

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