Development and permeation properties of SiO2-ZrO2 nanofiltration membranes with a MWCO of <200

SiO2-ZrO2 membranes with a low MWCO showed hydrothermal stability and high nanofiltration performance in water at 90 °C. The water permeabilities of membranes increased from 2.5×10-12 to 11.9×10-12 m3/(m2 s Pa) in operating temperatures from 25 to 90 °C, while the MWCO increased slightly from 150 to 210. This indicates that SiO2-ZrO2 membranes with a low MWCO showed excellent nanofiltration performance at high temperatures. The permeation properties for nanofiltration membranes were analyzed using the Spiegler-Kedem equation.