Abstract
It has been established that vaporization of binary solutions of low-molecular surfactants through asymmetric polymer membranes causes pronounced auto-oscillations of the permeability and selectivity of the membranes. This effect is accounted for by the periodic formation and collapse of micropores in the active layer of membranes; the corresponding mechanism is proposed. The validity of the physical pattern suggested is proved experimentally. A general approach to the mathematical description of substance transfer through structurally unstable solids is developed, which suggests some characteristic features of the differential equations that describe the process.
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