摘要 |
This membrane comprises asymmetric hollow fibre of poiyethersulphide for the purpose of pervaporation, treated with mixtures of liquids (C2H50H+X) in which X=toluene, acetone, dimethylformamide with a content of between 7 - 12% by volume of the mixture, subsequently treated with a solution at 2.5% by volume of urethanosiloxane in isopropylic alcohol. |