WATER-FLOW THROUGH POLYPROPYLENE TRACK MEMBRANES MODIFIED BY RADIATION-INDUCED GRAFTING

Modified membranes have been prepared by radiation-induced grafting of hydrophilic polymer onto polypropylene track membranes (PPTMs). The change in morphology and surface properties of graft membrane were investigated. The thickness of PPTMs grows linearly with grafting yield. Water contact angle on the original and modified membranes has been measured and it was shown that it decreases with grafting yield until the last will be equal to 5-7%. It is noteworthy that properties of graft membranes were unchanged during their storage under ambient conditions more than half a year.