Calculation of Concentration Dependent Mutual Diffusion Coefficients for the Penetration Period of Sorption Process in Polymer Film

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Shigetoshi Kobuchi¹  Yuji Sano¹  Shuichi Yamamoto¹ 

[1] Department of Applied Chemistry and Chemical Engineering, Yamaguchi University

关键词: Mass Transfer;    Mutual Diffusion Coefficient;    Adsorption;    Desorption;    Polymer;    Drying;   

DOI  :  10.1252/jcej.28.193

来源: Maruzen Company Ltd

【 摘 要 】

References(12)Cited-By(3)A new method of calculating concentration dependent mutual diffusion coefficients was proposed for the penetration period of adsorption and desorption processes in polymer film. The diffusion equation for a slab based on a dissolved solid coordinate with constant surface concentration was solved numerically for the sorption process, assuming a power function for the concentration dependence of the diffusion coefficient. The solvent concentrations corresponding to the apparent diffusion coefficients, which were calculated easily from the experimental sorption rate curves of the penetration period, were correlated with the surface concentrations using the power value of the concentration dependence as the parameter. Using this correlation, the relation between the diffusion coefficient and the concentration was obtained easily by trial calculation.

【 授权许可】

Unknown