Membranes: A Variety of Energy Landscapes for Many Transfer Opportunities
AbstractA membrane can be represented by an energy landscape that solutes or colloids must cross. A model accounting for the momentum and the mass balances in the membrane energy landscape establishes a new way of writing for the Darcy law. The counter-pressure in the Darcy law is no longer written as the result of an osmotic pressure difference but rather as a function of colloid-membrane interactions. The ability of the model to describe the physics of the filtration is discussed in detail. This model is solved in a simplified energy landscape to derive analytical relationships that describe the selectivity and the counter-pressure from ab initio operating conditions. The model shows that the stiffness of the energy landscape has an impact on the process efficiency: a gradual increase in interactions (such as with hourglass pore shape) can reduce the separation energetic cost. It allows the introduction of a new paradigm to increase membrane efficiency: the accumulation that is inherent to the separation must be distributed across the membrane. Asymmetric interactions thus lead to direction-dependent transfer properties and the membrane exhibits diode behavior. These new transfer opportunities are discussed. View Full-Text
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Bacchin, P. Membranes: A Variety of Energy Landscapes for Many Transfer Opportunities. Membranes 2018, 8, 10.
Bacchin P. Membranes: A Variety of Energy Landscapes for Many Transfer Opportunities. Membranes. 2018; 8(1):10.Chicago/Turabian Style
Bacchin, Patrice. 2018. "Membranes: A Variety of Energy Landscapes for Many Transfer Opportunities." Membranes 8, no. 1: 10.
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