Abstract
The recent developments of organic-inorganic materials applied for gas separation membranes are reviewed. The fundamentals of permeation in mixed matrix membranes are summarized, extending the examples to systems that do not follow the Maxwell equation. The advantages of organic-inorganic polymer networks for membranes are discussed. Some new promising systems including nanocomposites with block copolymers, metal-organic frameworks and carbon fillers with different geometries are presented.