在膜分离过程中,渗透物分子在聚合物膜内的扩散过程,是影响聚合物膜分离性能的关键因素.详细考察了目前被广泛使用的Vrentas-Duda扩散模型,对其进行改进,提出了新的计算ζ的公式.根据新提出的公式,对聚苯乙烯/甲苯(PS/toluene)、聚苯乙烯/乙苯(PS/ethylbenzene)、聚乙酸乙烯酯/甲苯(PVAc/toluene)3种体系中弱极性渗透物分子的扩散系数进行了预测,其较之原Vrentas-Duda扩散模型、Ju改进的Vrentas-Duda扩散模型有更好的预测结果.
参考文献
| [1] | 王保国,山口猛央,中尾真一.基于物性推算法的膜分离材料设计[J].膜科学与技术,2001(05):7-13. |
| [2] | Feng X;Huang R Y M .Liquid separation by membrane pervaporation[J].Industrial and Engineering Chemistry Research,1997,36:1048-1066. |
| [3] | Wijmans J G;Baker R W .The solution-diffusion model:[J].Journal of Membrane Science,1995,107:1-21. |
| [4] | 陈翠仙;李继定.渗透汽化膜传递理论研究的进展[A].北京,1999:2-6. |
| [5] | Ho W S;Sirkar K K.Membrane Handbook[M].New York: Van Nostrand Reihold Press,1992 |
| [6] | Mulder M.Basic Principles of Membrane Technology[M].Dordrecht:Kluwer Academic Publishers,1991 |
| [7] | Fircke H .A mathematical treatment of the electric conductivity and capacity of disperse systems[J].Physical Review,1984,24:575-582. |
| [8] | Cukier R I .Diffusion of brownian spheres in semidilute polymer solutions[J].Macromolecules,1984,17:252-255. |
| [9] | Yasuda H;Lamaze C E;Ikenberry L D .Permeability of solutes through hydrated polymer membranes.Patr I.Diffusion of sodium chloride[J].Die Makromolekulare Chemie,1968,118:19-27. |
| [10] | Vrentas J S;Duda J L .Diffusion in polymer-solvent systems (Ⅰ) Reexamination of the free-volume theory[J].Journal of Polymer Science Part B:Polymer Physics,1977(15):403-416. |
| [11] | Vrentas J S;Duda J L .Diffusion in polymer-solvent systems (Ⅱ) Predictive theory for the dependence of diffusion coefficients on temperature,concentration[J].Journal of Polymer Science Part B:Polymer Physics,1977(15):417-439. |
| [12] | Vrentas JS.;Vrentas CM. .Predictive methods for self-diffusion and mutual diffusion coefficients in polymer-solvent systems[J].European Polymer Journal,1998(5/6):797-803. |
| [13] | Seong-Uk Hong .Prediction of Polymer/Solvent Diffusion Behavior Using Free-Volume Theory[J].Industrial & Engineering Chemistry Research,1995(7):2536-2544. |
| [14] | Fredenslund A;Gmehling J;Resmussen P.Vapor-liquid equilibria using UNIFAN[M].New York:Elsevier Scientific,1977 |
| [15] | Ju S T;Duda J L;Vrentas J S .Influence of temperature on the diffusion of solvents in polymers above the glass transition temperature[J].Industrial & Engineering Chemistry Process Design and Development,1981,20:330-335. |
| [16] | Vrentas JS.;Faridi N.;Vrentas CM. .EFFECT OF SOLVENT SIZE ON SOLVENT SELF-DIFFUSION IN POLYMER-SOLVENT SYSTEMS[J].Macromolecules,1996(9):3272-3276. |
| [17] | Vrentas J S;Duda J L;Ling H C .Free-volume theories for self-diffusion in polymer-solvent systems[J].Journal of Polymer Science,1985,23:275-288. |
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