Nanoporous MgAl<sub>2</sub>O<sub>4</sub> coating on porous Al<sub>2</sub>O<sub>3</sub> support by aerosol deposition method for organic polymer filtration membrane

Ultra- and nanofiltrations are utilized for the separation of polymers and proteins. In this study, we have investigated the application of the MgAl2O4 membrane produced by the aerosol deposition (AD) method for the separation of a polymer. A MgAl2O4 ultrafiltration membrane on the porous Al2O3 support layer was produced with intentionally leaving nano-sized pores instead of a completely dense membrane. The filtration performance was investigated by removing 1 million molecular-weight polyethylene oxide (PEO) from water, and the rejection rate with the AD MgAl2O4 on Al2O3 support to PEO was ∼44 % at the differential pressure of only ∼0.1 MPa, which was three times higher than our previous report by the dip-coating MgAl2O4 on Al2O3 of ∼14 %.