Stereocomplex permeability

The permeabilities of the stereocomplex membranes to water and NaCl are shown in Fig. 38 as a function of the water content or the composition (isotactic mol%). The permeability ratios of urea to NaCl are summarized in Table 20315). The dependence of water permeability on the water content is very strong whereas that of the permeability to solutes (in this case NaCl) is weak. The water permeability of the PMMA membrane is extremely high compared to that of cuprophan whereas its permeability to solute is almost the same. This characteristic permeability accounts for the effect of the hyd-... 

Table 20. Ratios of urea permeability to NaCl permeability of stereocomplex membranes3155...

Fig. 38 a, b. Permeabilities of stereocomplex membranes to water and NaCl315). (a) Effect of water content, (b) effect of isotactic polyfmethyl methacrylate) content... 

T. Kobayashi, M. Todoki, M. Fujii, T. Takeyama and H. Tanzawa, Permeability and structure of PMMA stereocomplex hollow fiber membrane for hemodialysis, in E. Drioli and M. Nakagaki (Eds.), Proc. Eur.-fpn Cong. Membr. Membr. Processes, Plenum, New York, NY, 1986, pp. 507-513. 

Tsuji, H. and Tsuruno, T. (2010) Water vapor permeability of poly(L-lactide)/poly(D-lactide) stereocomplexes. Macromolecular Materials and Engineering, 295, 709-715. 

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