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The transport of urea and other biologically interesting solutes in aqueous solution across poly(2‐hydroxyethyl methacrylate) (p‐HEMA) hydrogel membranes has been studied. The results show that p‐HEMA membranes have a high permeability to urea due to a strong interaction between the polymer and urea, and, in addition, they are consistent with a pore flow model in which solute transport takes place through water‐filled regions essentially unaffected by the surrounding polymer matrix. The results indicate that such p‐HEMA membranes might be suitable for hemodialysis applications.
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Ratner et al. (1973) studied this question.
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