Metal Organic Frameworks UiO-66 improve the performance of PIM-1 gas separation membranes.
The separation performance of the MMMs exceeds the 2008 Robeson upper bound for various gas pairs.
The effect of UiO-66 on PIM-1 can be described by the Maxwell model.
Methanol treatment greatly enhances the permeability.
Mixed gas permeation experiments confirm an excellent separation performance.