Preparation and Performance of Organically Modified Montmorillonite Composite Separation Membrane.

A new composite separation membrane was developed by using organically modified montmorillonite (OMMT) as an additive. The effects of OMMT on the modification and properties of PVDF composite membranes were investigated. It is found that different kinds and amounts of OMMT into the casting solution can obviously change the pure water flux, separation performance and hydrophilicity of composite membrane in varying degrees. When the TA/PDA-MMT was 0.5 wt%, the pure water flux of the membrane reached the maximum, which was 584.7 L/(m²·h), about 6 times that of the original membrane. The OMMT/PVDF composite membrane had good hydrophilicity and stability in the treatment of oily wastewater. The development of novel OMMT/PVDF composite membrane will provide a new idea for solving the problem of oily wastewater treatment. [ABSTRACT FROM AUTHOR]