Abstract
Polypropylene dialysis membranes were prepared by direct grafting by means of cobalt-60 gamma radiation of 2-hydroxyethyl methacrylate onto polypropylene membranes. The influence of dose, dose rate, and concentration of monomer on the degree of grafting was investigated. The structure and the morphology of both the grafted membrane and the polypropylene membrane were observed by scanning electron microcospy and IR spectroscopy, respectively. The mechanical properties of the membranes were also determined. The permeability of the grafted membranes and polypropylene membranes toward urea and uric acid was studied in a dialyzer. In all cases, the grafted membranes showed improved permeability toward those solutes in comparison with the polypropylene membranes. The permeation coefficients of urea and uric acid through the grafted membranes were about 4.6 and 19 times larger than that of polypropylene membranes. The urea permeation coefficient of the grafted membranes was close to that of cuprophan.
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