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Mixed Matrix Membranes with Improved Gas Separation Properties

Date Posted
USPN 9,597,643

Opportunity

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.

Overview

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.

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

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