KCl, 四級アンモニウム塩化物およびドデシルアミン塩酸塩のゼラチン膜における界面透過性と膜内透過性

概要

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The permeation at the interface and in the membrane were studied by using two kinds of the measurement cells for permeation. Two kinds of gelatin membranes were used, which were cross-linked by different formaldehyde cross-linking process. KCl, tetra-alkylammonium chlorides and dodecylamine hydrochloride were used as solutes. The thickness of stagnant layer, δ, the rate constant of interfacial permeation, k, and the rate constant of permeation at the membrane surface, k_S, were obtained under various conditions. Without stirring it was found that δ depended on the density of solution and k_S depended on the diffusion coefficient, D, and on the interactions between gelatin and solute. Furthermore, k_S was different for the membranes prepared by a different cross linking process. Permeability coefficient in the membrane phase, P^*, decreased along a sigmoidal curve with increasing gelatin content. The apparent membrane constant, f^*(=P^*/D), was disscused by Wang's and Mackie's equation. f^* depended on the radius of solute and the interaction between ge1atin and solute. In the case of KCl, these values agreed with the above equations.
1974-09-25