Transport through Nafion

Ren, X., Springer, T. E., Zawodzinski, T. A. and Gottesfeld, S. 2000. Methanol transport through Nafion membranes— Electro-osmotic drag effects on potential step measurements. Journal of the Electrochemical Society 147 466-474. 

T.A. Zawodzinski, C. Derouin, S. Radzinski, R.J. Sherman, V.T. Smith, T.E. Springer, and S. Gottesfeld. Water-uptake by and transport through Nafion(R) 117 membranes. Journal of the Electrochemical Society 140, 1041-1047 1993. 

In a later chapter we will propose a model of ionic clustering which we believe is an essential agreement with these results (20). The real strength of the model, however, is that it can be used to understand and describe ion transport through "Nafion" perfluor inated membranes 03, 25, 26). 

A general formalism is presented to describe the structural organization of ionomers under different physicochemical conditions. The theory is applied specifically to Nafion. Resultant predicted properties are compared with experimental findings. Preliminary application of the predicted ionomeric molecular structure of Nafion to modeling ion transport through Nafion chlor-alkali separators is discussed and evaluated. 

For example, a pyrolytic graphite electrode was coated with NAFION (71). After electrostatically attaching metal complexes Into the membranes, chemical reactions were carried out In the membrane or at the membrane Interface with the solution. Other studies have focused on the mechanism of charge transport through NAFION coated on glassy carbon electrodes and containing Cp-FeXMA, Ru(bpy), and Os(bpy) where Cp FeTMA Is [(trlethylammonlo)methyl)ferrocene (72). 

T. E. Springer, S. Gottesfeld, Water nptake by and transport through NAFION 117 membranes, J. Electrochem. Soc. 140 (1993) 1401—1407. 

G. Q. Lu, F. Q. Liu, and C.-Y. Wang. Water transport through Nafion 112 membrane in DMFC s. Electrochem. Solid State Lett., 8 A1-A4, 2005. 

Zawodzinski TA Jr, Derouin C, Radzinski S, Sherman RJ, Smith VT, Springer TE, Gottesfeld S (1993) Water uptake by and transport through Nafion 117 membranes. J Electrochem Soc 140 1041-1047... 

Table HI. Summary of Parameters Calculated for Facilitated Transport Through Nafion Hollow Fibers.

Zawodzinski, Jr., T. A., C. Deroiun, S. Radzinski, R. J. Sherman, T. Springer, and S. Gottesfeld, Water Uptake By and Transport Through Nafion 117 Membranes, Journal of the Electrochemical Society, Vol. 140, 1993, p. 1041. Zawodzinski, Jr., T. A., C. Lopez, R. Jestel, J. Valerio, and S. Gottesfeld, A Comparative Study of Water Uptake By and Transport Through lonomeric Fuel Cell Membranes, Journal of the Electrochemical Society, Vol. 140, 1993, p. 1981. Naflon product sheet, Dupont NAElOl, February 2004. 

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