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Permeability studies with crosslinked cellophane
Author(s) -
Peterson Clarke M.,
Livingston Ernest M.
Publication year - 1964
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1964.070080332
Subject(s) - cellophane , cellulose , materials science , permeability (electromagnetism) , chemical engineering , membrane , diffusion , polymer , polymer chemistry , chloride , microstructure , penetration (warfare) , ion , composite material , chemistry , organic chemistry , thermodynamics , biochemistry , physics , operations research , engineering , metallurgy
Evidence for the crosslinking of cellulose by chemical treatment has been discussed by numerous authors. In the present investigation an effort is made to determine whether such a structural change in cellulose may be inferred from a change in permeability. The effect of a dialdehyde starch crosslinking treatment on the permeability of cellophone, to potassium chloride ions from dilute solution is studied. Diffusion coefficients are calculated and compared. To account for sensitivity of diffusion results to the microstructure of the cellophane, it is assumed that under the experimental conditions a significant portion of the transport of ions across the membrane may take place by a process of activated diffusion directly through the polymer network. It is suggested that the crosslinking treatment blinds adjacent cellulose chains together creating a more rigid network structure which should resist penetration by diffusing ions.