Stability studies of poly(vinyl chloride)-based polymer inclusion membranes containing Aliquat 336 as a carrier

Abstract

The stability of poly(vinyl chloride)-based polymer inclusion embranes (PIMs) containing 40(w/w)Aliquat 336 (R3MeNPCl-) and 60(w/w) PVC is studied in detail when these membranes are immersed in deionized water and in aqueous solutions containing various salts or hydrochloric acid. It is shown that the mass loss is suppressed in the salt solutions and that the effectiveness of the suppression follows the order: NaClO4 NaNO3 NaSCN NaCl - LiCl - HCl a2SO4 CH3COONa. It is also demonstrated that the distribution ratio of R3MeNPX- (where X- is Cl- or NO-3 ) between the PIM and the aqueous solution depends on the concentration of the "common anion" X- in the solution. However, in every case, the PI..