MODIFIED POLYACRYLONITRILE MEMBRANES

摘要

According to the invention, a modified polyacrylonitrile (PAN) membrane is produced using a polymer blend. The polymer blend in question consists of (a) a PAN-homopolymer or an acrylonitrile-containing copolymer, and (b) a polymer which is at least largely resistant to hydroxylamine. The unmodified membrane produced from this polymer blend is subsequently treated, and thereby modified, with hydroxylamine. The modified PAN membrane according to the invention can be used in particular for the extraction of heavy metals in low-pressure reverse osmosis or nanofiltration processes carried out at high flow-through rates.