FORMATION AND CHARACTERISTICS OF ZIRCONIUM ULTRAFILTRATION DYNAMIC MEMBRANES OF VARIOUS PORE SIZES

A dynamic membrane was formed by deposition of colloid particles on a ceramic support. The ZrOCl2 and H2SO4 mixing method was found to be th e best method for obtaining regular size particles. The size of the co lloid particles increased Linearly with the increases of the [H2SO4]/[ ZrOCl2] ratio, and ranged from 20 to 200 nm. The dynamic membrane was prepared under a pressure of 0.8 MPa and the particles remained intact and were homogeneously deposited on the ceramic support surface. It i s possible to prepare dynamic membranes of molecular weight cut-off gr eater than 100,000 dalton, and the cut-off increases linearly with the colloid particle size. The dynamic membrane separated BSA from glucos e solution effectively. (C) 1998 Elsevier Science B.V.