Comparison of electrochemical characteristics of acetylcellulose microfiltration membranes and a model system |
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| Authors: | V A Pripisnova A K Khripunov L E Ermakova N F Bogdanova M P Sidorova |
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| Institution: | (1) Discovery Research Laboratories, Shionogi & Co., Ltd., 1-3, Kuise Terajima 2-chome, Amagasaki, Hyogo 660-0813, Japan;(2) AntiCancer Inc., 7917 Ostrow Street, San Diego, CA 92111, USA;(3) Department of Biofunctional Chemistry, Graduate School of Natural Science and Technology, Okayama University, Okayama Okayama, 700-8530, Japan;(4) Institute for Chemical Research, Kyoto University, Uji Kyoto, 611-0011, Japan |
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| Abstract: | The electrokinetic properties of commercial acetylcellulose microfiltration membranes are compared to a model system, i.e.,
an acetylcellulose film applied to a plane-parallel capillary made of quartz glass. It is shown that the absolute magnitudes
of the electrokinetic potentials of the model system are higher than those of the examined microfilters, seemingly because
the latter are modified to increase their mechanical strength and elasticity. The dissociation constants of carboxyl groups
and the adsorption potentials of potential-determining ions are found from the electrokinetic data on the model system. |
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