Polybenzimidazole membrane fabrication

Casting by solvent evaporation is a commonly used procedure for fabrication of membranes based on organic polymers. It is probably the most widely used technique for polybenzimidazole membrane preparation for high-temperature polymer electrolyte membrane fuel cells. After casting, doping with phosphoric acid provides proton conductivity to the membrane. 

Wang, K.Y. and Chung, T.S. 2006. Fabrication of polybenzimidazole (PBI) nanofiltration hollow fiber membranes for removal of chromate. 281 307-315. 

Choi S, Coronas J, Lai Z et al (2008) Fabrication and gas separation properties of polybenzimidazole (PBI)/ nanoporous silicates hybrid membranes. J Membr Sci 316 145-152... 

Lee JW, Khan SB, Akhtar K et al (2012) Fabrication of composite membrane based on silicotungstic heteropolyacid doped polybenzimidazole for high temperature PEMFC. Int J Electrochem Sci... 

One of the primary rationales for producing blends of polysulfone with other polymers is to use the polysulfone to impart separation and membrane capabilities to the material and for the second polymer to provide higher temperature performance than is possible with the use of the polysulfone alone. For example, in the next section of this chapter, blends of polysulfone with other high temperature polymers such as polyimides (Pis) and polybenzimidazole (PBl) will be discussed. Much of that effort is focused on the production of miscible blends that can be fabricated into both symmetric and asymmetric membranes. Later sections of this chapter will focus on the use of polysulfone in mixtures to modify other properties of polymers, particularly the fracture and impact behaviors. 

G. Krishnan, I. S. Jayaweera, Fabrication and scale-up of polybenzimidazole (PBI) membrane based system for precombustion based capture of carbon dioxide , 2011 NETL C02 Capture Technology Meeting, August 2011. 

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