The paper reports the performances of the polysulfone-polyaniline (PSf-PANI) porous composite membranes
for various ratios PSf / PANI in membranes. Polysulfone-polyaniline porous composite membranes are
obtained by phase inversion with chemical reaction. PANI is obtained in-situ by oxidative aniline
polymerization. Composite membranes are morphologically studied by electron microscopy and characterized by thermal analysis and water solutions permeation at different pH and pressures. Polysulfone-polyaniline porous composite membranes UF processes performances to BSA separation are also reported.