High-Performance γ-AlO Multichannel Tube-Type Tight Ultrafiltration Membrane Using a Modified Sol-Gel Method.

We introduced a modified sol-gel method using polyvinyl alcohol (PVA) as an additive to improve the permeability of γ-AlO membranes by minimizing the thickness of the selective layer and maximizing the porosity. First, the analysis revealed that the thickness of γ-AlO decreased as the concentration of PVA increased in the boehmite sol. Second, the properties of the γ-AlO mesoporous membranes were greatly influenced by the modified route (method B) compared to the conventional route (method A).

Effect of the Peptization Process and Thermal Treatment on the Sol-Gel Preparation of Mesoporous α-Alumina Membranes.

Compared to traditional membrane materials, alumina membranes are particularly beneficial for industrial wastewater treatment. However, the development of mesoporous α-alumina membranes for ultrafiltration applications is still a challenge due to uncontrolled pore size. In this study, we optimized the sol-gel method for the fabrication of a high-performance mesoporous α-alumina membrane.