E. Oikawa et al., SEPARATION PERFORMANCES OF THE MEMBRANES PREPARED FROM SCHIFF-BASES OF POLY(ALLYLAMINE) FOR ORGANIC SOLUTES, Polymer, 35(10), 1994, pp. 2153-2159
Permselective separation between water and water-soluble organics was
investigated up to high concentration levels through crosslinked and m
etal complexed membranes of hybrid Schiff-base derivatives of poly(all
ylamine), which were prepared by the reaction between pyridine-2-carbo
xaldehyde (P) and salicyl aldehyde (S) with varying ratios of P/S. The
complexed membranes had strong hydrophilic character and showed an in
creased flux and high permselective separation for t-butanol and tetra
hydrofuran at high concentrations. Correlations between the performanc
e of the complexed membranes and the physicochemical parameters, espec
ially the solubility parameters, of alcohols and aprotic solutes were
studied and discussed. It was found that a membrane with a higher P/S
value tended to reject the aprotic solute with a smaller solubility pa
rameter, while other physical properties of the alcohols also effected
the alcohol separation.