Research of polypiperazine amide composite Nanofiltration membrane

By fabricating an functional layer on the polysulfone substrate through interfacial polymerization taking piperazine as the monomer in aqueous phase,trimesoyl chloride as the monomer in organic phase and Na3PO4 as the acid acceptor,high performance nanofiltration composite membranes are prepared.The influences of Na3PO4,TMC content,PIP content and polymerizing time on the separating performance of hollow fiber composite Nanofiltration membrane are initially investigated.The membranes prouduced are evaluated on operation pressure of 0.4 MPa and room temperature by using 0.1% MgSO4 aqueous solution.The results show that the composite membrane obtained herewith has good dessalination(97.2%) and high water permeate flux(36.64 L·m-2·h-1).