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Permeability Studies with Cellulosic Membranes by C. K. Colton; K. A. Smith; E. W. Merrill; P. C. Farrell is a Medicine article available to read on EtoBox.

What is Permeability Studies with Cellulosic Membranes about?

The true diffusive permeabilities of commercial, modified commercial, and laboratory cast regenerated cellulose membranes were measured wit,h a batch dialyzer using 15 solutes (sodium chloride, nine radioactively labelled organic solutes, and five low molecular weight proteins) ranging in molecular weight from 58 to 68,000. Additional measurements included membrane thickness, water content, and strengt,h propertie?, as well as equilibrium solut,e partition coefficients and solute diffusion coefficients in free solution. All commercial cellophanes were similar in sodium chloride permeability on a unit, t,hickness basis and were significantly less permeable than hydrophilic wet gel membranes. This difference was attributed to the irreversible collapse of membrane struct,ure upon drying. As the solute characteristic size increased, permeability decreased more sharply with commercial cellophane than with wet, gel cellulose, the ratio between the two becoming an order of magnitude for large solutes. The ratio between the solut,e diffusioa coefficient, in the membrane and in free solution decreased exponentially with increasing solute size. The results suggest further work for higher per

Who reads Permeability Studies with Cellulosic Membranes?

Author

C. K. Colton; K. A. Smith; E. W. Merrill; P. C. Farrell

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Heterocorporation; Wiley (ISSN 0021-9304)

Published

1971

Language

EN

Field

Medicine (Health Sciences)