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Mixed Matrix Membranes with Improved Gas Separation Properties

National Energy Technology Laboratory

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Technology Marketing Summary

Research is active on the patent pending technology titled, "Surface Functionalization of Metal Organic Frameworks for Mixed Matrix Membranes." This technology is available for licensing and/or further collaborative research from the U.S. Department of Energy’s National Energy Technology Laboratory.


Mixed matrix membranes are a type of membrane that consists of filler particles dispersed in a polymer matrix. In theory, these membranes should have excellent gas separation properties. However, the adhesion between the filler and polymer is often defective, resulting in non-selective voids, pore blockage, or even densification of the polymer in the region near the filler. Defects near the filler/polymer interface can have a negative effect on transport properties of the membrane resulting in decreased permeability and selectivity.

The current invention describes a method for surface modification of metal-organic framework filler particles to improve their compatibility with the polymer matrix resulting in increased interface interaction. The surface modified membranes contain fewer defects at the filler/polymer interface resulting in improved gas separation properties.



  • Method produces defect free mixed matrix membranes with enhanced gas separation properties
Applications and Industries
  • Post combustion carbon dioxide capture
  • Carbon dioxide and methane separation for natural gas sweetening
  • Oxygen and nitrogen separation for oxy-combustion processes
More Information

U.S. Non-Provisional Patent Application number 14/519,743, filed October 21, 2014, titled "Surface Modification of Metal Organic Frameworks for Mixed Matrix Membranes."

Inventors: David Luebke, Erik Albenze, Hunaid Nulwala, Michael Lartey, Nathaniel Rosi, Surendar Reddy Venna, and Tao Li



Technology Status
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