PERMEABILITY PROPERTIES OF CHARGED HYDROGEL-CARRYING MEMBRANES

Poly(2-vinylpyridine) is known to be hydrophobic, and a membrane prepared from it would not permeate water-soluble substances in aqueous media. By introducing hydrophilic poly(2-vinyl-N-methylpyridinium iodide) particles into the membrane, it would be possible to control permeation. This type of membrane was prepared and an increase in permeability was observed on increasing the amount of hydrophilic component in the membrane and decreasing the crosslink density of the hydrogel part. The size of the hydrogel particles did not have a significant effect on permeability. Scanning electron microscopy and microscopic examinations showed a homogeneous distribution of hydrogel particles in the membrane matrix. © 1990.