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Compatibilized Immiscible Polymer Blends for Gas Separations

Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd, Richardson, TX 75080-3021, USA
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Academic Editor: Volker Altstadt
Materials 2016, 9(8), 643; https://doi.org/10.3390/ma9080643
Received: 14 June 2016 / Revised: 11 July 2016 / Accepted: 26 July 2016 / Published: 30 July 2016
(This article belongs to the Special Issue Polymer Blends and Compatibilization)
Membrane-based gas separation has attracted a great deal of attention recently due to the requirement for high purity gasses in industrial applications like fuel cells, and because of environment concerns, such as global warming. The current methods of cryogenic distillation and pressure swing adsorption are energy intensive and costly. Therefore, polymer membranes have emerged as a less energy intensive and cost effective candidate to separate gas mixtures. However, the use of polymeric membranes has a drawback known as the permeability-selectivity tradeoff. Many approaches have been used to overcome this limitation including the use of polymer blends. Polymer blending technology synergistically combines the favorable properties of different polymers like high gas permeability and high selectivity, which are difficult to attain with a single polymer. During polymer mixing, polymers tend to uncontrollably phase separate due to unfavorable thermodynamics, which limits the number of completely miscible polymer combinations for gas separations. Therefore, compatibilizers are used to control the phase separation and to obtain stable membrane morphologies, while improving the mechanical properties. In this review, we focus on immiscible polymer blends and the use of compatibilizers for gas separation applications. View Full-Text
Keywords: immiscible polymer blends; compatibilizers; gas separation membranes immiscible polymer blends; compatibilizers; gas separation membranes
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Panapitiya, N.; Wijenayake, S.; Nguyen, D.; Karunaweera, C.; Huang, Y.; Balkus, K.; Musselman, I.; Ferraris, J. Compatibilized Immiscible Polymer Blends for Gas Separations. Materials 2016, 9, 643.

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