Membrane Science and Technology

Polymeric Membranes

Porous and polymeric membranes have a thin layer of semi-permeable material that is used for solute separation as transmembrane pressure is applied across the membrane. Polymeric membrane materials are intrinsically limited by a tradeoff between their permeability and their selectivity, yet they have been the basis for high-performance gas-separation applications. Virtually, all gas separations in polymeric membranes are limited by an upper boundary in a log–log plot of gas selectivity and permeability.