Modeling the interplay between solvent evaporation and phase separation dynamics during membrane

Herein, the numerical simulation of polymeric membrane formation is investigated when a coupling between phase separation and solvent evaporation occurs. A binary polymer/solvent system considered simulations were performed in 2D geometries, first horizontal plan, then vertical cross-section plan. The was simulated using Cahn-Hilliard equations Flory-Huggins theory used to describe thermodynamics system. coupled continuous mass flux at upper interface system, whose magnitude controlled by transfer driving force. patterns analyzed Minkowski descriptors Fourier analysis. results exhibit strong influence vicinity interface, leading dense skin, kinetics concentration thickness shown depend on initial polymer coefficient. Beneath layer, tends relax minimize its free energy so that bulk solution found homogeneous weakly affected evaporation.