Preparation of Synthetic Membranes

In chapter II it was shown that a large number of materials can be used as the basis for membrane preparation. A number of preparation techniques exist which enable a membrane to be constructed from a given material. The kind of technique employed depends mainly on the material used and on the desired membrane structure (which in turn is dependent on the separation problem). Three basic types of membrane can be distinguished based on structure and separation principles:porous membranes (microfiltration, ultrafiltration)nonporous membranes (gas separation, pervaporation)liquid membranes (carrier-mediated transport)