| Diffusion Characteristics in Microcapsules |
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| 作者姓名： | 姚善泾 赵万纪 |
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| 作者单位： | College of Chemical Engineering Zhejiang University，Department of Food Engineering，Dong-Seo University Hangzhou 310027，China，69-1 Jurea-dong Sasanggu Pusan，616-010 Korea |
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| 基金项目： | Supported by the National Natural Science Foundation of China(No.29676069),the Foundation of the National Education committee of China and Mr.Chao Guangbiao advanced Technology Foundation of Zhejiang University. |
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| 摘 要： | An equation of diffusion for microcapsules(hollow sphere)was developed,employing the mathematicalmodel for the diffusion characteristics of solid sphere.In the proposed equation,a combination diffusion coeffi-cient was introduced as a substitute for the diffusion coefficient in the solid sphere mathematical model and ex-pressed as a function of the diffusion coefficient inside solution of hollow sphere,as well as in the polymer mem-brane.With this modified model,the diffusion coefficients of glucose in NaCS(sodium cellulose sulfate)-PDADMAC(Poly-diallyl-dimethyl-ammonium chloride)membrane and in Ca-alginate gel membrane were deter-mined.The diffusion coefficient in NaCS-PDADMAC membrane was found to be 2.12×10~(-11)m~2·s~(-1)and thatin Ca-alginate membrane 2.62×10~(-10)m~2·s~(-1).
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| 关 键 词： | diffusion coefficient glucose NaSC-PDADMAC membrane Ca-alginate membrane microcapsule hollow sphere immobilization |
| 收稿时间： | 1997-6-2 |
| 修稿时间： | |
Diffusion Characteristics in Microcapsules |
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| YAO Shanjing,Cho Man-Gi.Diffusion Characteristics in Microcapsules[J].Chinese Journal of Chemical Engineering,1998,6(2):116-123. |
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| Authors: | YAO Shanjing Cho Man-Gi |
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| Affiliation: | College of Chemical Engineering, Zhejiang University, Hangzhou 310027, China Department of Food Engineering, Dong-Seo University, 69-1 Jurea-dong Sasanggu Pusan, 616-010 Korea |
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| Abstract: | An equation of diffusion for microcapsules (hollow sphere) was developed, employing the mathematical model for the diffusion characteristics of solid sphere. In the proposed equation, a combination diffusion coefficient was introduced as a substitute for the diffusion coefficient in the solid sphere mathematical model and expressed as a function of the diffusion coefficient inside solution of hollow sphere, as well as in the polymer membrane. With this modified model, the diffusion coefficients of glucose in NaCS (sodium cellulose sulfate)- PDADMAC (Poly-diallyl-dimethyl-ammonium chloride) membrane and in Ca-alginate gel membrane were determined. The diffusion coefficient in NaCS-PDADMAC membrane was found to be 2.12×10-11 m2·s-1 and that in Ca-alginate membrane 2.62×10-10m2·s-1. |
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| Keywords: | diffusion coefficient glucose NaSC-PDADMAC membrane Ca-alginate membrane microcapsule hollow sphere immobilization |
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