Equilibrium and transport properties of polydisperse polyelectrolytes in graft-modified porous charged membranes: forced permeation–diffusion of lignosulfonate
文献信息
The convective diffusion of a polydisperse polyelectrolyte (lignosulfonate) through charged porous membranes is studied. The membranes are characterised by potentiometric transport number determination both in the presence and in the absence of lignosulfonate. The convective diffusion experiments are carried out with NaCl and HCl as supporting electrolytes. The effect of using different concentrations of supporting electrolyte in the two cell compartments is also studied. The Donnan equilibrium and steady-state transport of the polyelectrolyte in a convective diffusion cell are theoretically described, and the effects of changing the supporting electrolyte (and pH) are discussed. Good agreement between theoretical and experimental results is obtained. It is shown that the effective membrane fixed charge reverses its sign due to polyelectrolyte adsorption.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.














