Reverse osmosis composite membrane was prepared by interfacial polymerization (IP) of metaphenylene diamine (MPD) with trimesoyl chloride (TMC) on the surface of polysulfone (PS) support.The effects of monomers concentration

reaction time of IP

time and temperature of heat treatment on the separation performance of composite membranes were investigated.The influences of phase-transfer catalyst (PTC) on the separation performance of composite membrane were also studied

and the mechanism of reaction process was discussed.From the orthogonal experiment results

the optimum conditions were the concentration of TMC and PMD 3 g8226;L-1

20 g8226;L-1 respectively

and the temperature and time of heat treatment 90 ℃ and 15 min

and the flux of 14.91 L8226;m-28226;h-1 as well as rejection of 0.951 (pressure 1.6 MPa

temperature 25℃

concentration of NaCl 20000 mg8226;L-1) were obtained under these conditions.In addition

it was found that at a low concentration of MPD

the separation performance of composite membrane could be remarkably improved by adding PTC into the water phase.