A predictive model for mass transfer has been formulated based on the multicomponent generalization of the Flory-Rehner theory using the generalized Onsager formalism. Experiments on benzene/cyclohexane permeation through peroxide crosslinked NBR show that the relative permeation of the components can be predicted in a completely a priori manner given data on the network modulus and pure component swelling ratios. A single parameter sets the absolute permeation rates. The formalism is capable of being used for materials design and its application has led to a world record in selectivity for the separation of isobutanol from water. Accordingly, experiments confirm the applicability of the theory to practical problems in multicomponent mass transfer through cross-linked rubbery polymer materials.

Predictive model for multicomponent mass transfer in polymeric networks

248th National Meeting (2014)

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