Transport phenomena of sulfonated dyes into cellulose membrane: Effects of urea on parallel diffusion of mono azo dyes |
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| Authors: | M Maekawa M Ohmori A Yamashita M Nango |
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| Institution: | (1) Division of Life Science and Human Technology Nara Women’s University Nara 630, Japan, JP;(2) Department of Applied Chemistry Nagoya Institute of Technology Showa-ku, Nagoya 466, Japan, JP |
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| Abstract: | Effects of urea on transport phenomena of sulfonated azo dyes with different aggregation constants into water-swollen cellulose
membrane have been studied at 25–55 °C. The results were analyzed on the basis of a parallel transport theory of surface and
pore diffusion. Addition of urea decreased equilibrium adsorption of the dyes onto cellulose and increased the surface and
pore diffusivities for the parallel diffusion model of the dye with high aggreg-ation constant. Temperature dependence of
the effects was also discussed.
Received: 30 November 1996 Accepted: 7 April 1997 |
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| Keywords: | Sulfonated dye cellulose membrane urea parallel transport theory aggregation constant |
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