Novel polyphenylsulfone membrane for potential use in solvent nanofiltration

► Synthesis, characterization and performance of novel polyphenylsulfone (PPSU) nanofiltration membranes for the first time. ► Ternary phase diagram of polyphenylsulfone polymer solution in aprotic solvent. ► Measuring membrane pore size, porosity and mechanical stability of flat sheet membrane. ► Investigation of permeability of methanol through prepared PPSU membrane. ► Investigation of the effect of different solvent on performance of membrane before and after of solvent treatment.