Rational Design of Halloysite Surface Chemistry for High Performance Nanotube−Thin Film Nanocomposite Gas Separation Membranes

The effects of surface chemistry of nanofillers on gas separation performance of thin film nanocomposite (TFN) membranes were studied. Ehsan Chehrazi and coworkers developed pristine and three differently surface-modified halloysite nanotubes (HNTs), by non- (SHNT), moderately (ASHNT), or highly CO2-philic (SFHNT) agents. 

Nanomaterials are embedded in the polyamide top layer of thin film nanocomposite (TFN) membranes for CO2/N2 and CO2/CH4 separations. Authors demonstrated that the thickness of the interfacial layer between the filler and polymer matrix is a function of gas pressure applied on the membrane.