Fixed (site) carrier membranes (FSC) combine the durability of a dense membrane with the selectivity of a supported liquid membrane (SLM) overcoming the limitation of SLM, degradation due to the wash out of the carrier solution over time. The carrier is either covalently bonded to the polymer chain (chained carrier) or immobilized in the polymer matrix by physical constraints or weaker ionic bonding. A fixed carrier membrane will separate mainly via facilitated transport mechanism, implying that the carrier will react specifically with one of the components to be separated.
Noble (1990, 1991) and Cussler (Cussler et al. 1989) developed two different models to describe the transport across fixed carrier membranes. E. L. Cussler explained the transport by “chained carrier” theory, when carriers are covalently bonded, requiring a certain mobility of polymeric chains and that a percolation threshold appears when two chained carriers are too far apart.
R. Noble described the transport of...
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References
Barrer RM (1984) Diffusivities in glassy polymers for the dual mode sorption model. J Membr Sci 18:25
Cussler EL, Aris R, Bhown A (1989) On the limits of facilitated diffusion. J Membr Sci 43:149–164
Noble RD (1990) Analysis of facilitated transport with fixed site carrier membranes. J Membr Sci 50:207–214
Noble RD (1991) Analysis of ion transport with fixed site carrier membranes. J Membr Sci 56:229–234
Further Reading
Baker RW (2004) Membrane technology and applications. McGraw- Hill, New York
Mulder M (2003) Basic principle of membrane technology. Kluwer, London
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Sandru, M. (2016). Fixed Carrier Membrane. In: Drioli, E., Giorno, L. (eds) Encyclopedia of Membranes. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-44324-8_229
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