Permeation and sorption of gases in mixed matrix membranes based on hyperbranched polyimides and hollow silica microspheres

摘要

Further progress in field of membrane separations requires new ideas and approaches to substantially overcome well-known limitations of permeability-selectivity trade-off, known as the Robeson plot [1]. New successful separation membranes require increasingly sophisticated membrane materials with improved performance. The preparation and characterization of mixed matrix materials (MMM) based on a polymer matrix and organic or inorganic additive is a rapidly developing field of investigation that has made possible the tailoring of new materials combining the properties of both components. The success of matrix mixed materials depends greatly on a proper balance between properties of the polymer matrix and that of the additives (chemical composition, morphology, weight (volume) ratio, compatibility [2].