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The Use of Conducting Polymers in Membrane-Based Separations

A Review and Recent Developments


Address for correspondence: John Pellegrino, Santa Fe Science and Technology, Inc., 3216 Richards Lane, Santa Fe, NM 87507, USA. Voice: 505-474-6656; fax: 505-474-9489.


Abstract: As a material family, π-conjugated polymers (also known as intrinsically conductive polymers) elicit the possibility of both exploiting the chemical and physical attributes of the polymer for membrane-based separations and incorporating its electronic and electrochemical properties to enhance the separation figures-of-merit. This review article, although by no means comprehensive, provides a current snapshot of the investigations from many research laboratories in the use of conducting polymers for membrane-based separations. The review focuses primarily on polyaniline, polypyrrole, and substituted-polythiophene and includes applications in gas separations, liquid (and/or vapor) separations, and ion separations. Additionally, we discuss the broad challenges and accomplishments in membrane formation from conducting polymers.