Poly(urethane-imides) as perspective materials for the development of gas separation, pervaporation and filtration membranes

Abstract

This review presents the separation properties of membranes based on poly(urethane-imides), polymers that are modern products of the chemical modification of polyimides and polyurethanes. An overview of the membrane properties of poly(urethane-imides) is based on the principles of their chemical design. The following membranes are considered: multiblock (segment) polymers, polyimides crosslinked with polyurethanes, hybrid poly(urethane-imide) materials, poly(urethane-imides) subjected to selective destruction of urethane blocks. In the cases under consideration, ideas are given about the main directions in the synthesis of membrane poly(urethane-imides), reagents and reaction conditions are given. The transport and separation properties of poly(urethane-imide) membranes in the processes of gas separation, pervaporation and ultrafiltration are given in detail. Applications for which poly(urethaneimide) membranes have been developed are described. In general, an idea is given about the importance of poly(urethane-imide) gas separation, pervaporation and filtration membranes for separation processes.