Process for preparing reverse-osmosis membranes.

摘要

The present invention relates to a process for preparing polypiperazinamide-based reverse-osmosis membranes comprising the following succession of steps: a) preparing a solution of polypiperazinamide in a polar organic solvent; b) applying the solution on a planar support so as to form a planar body; c) evaporating the solvent under the action of a flow of air; d) gelifying the planar body by phase reversal by passing through a coagulation bath; e) washing the membrane to extract the solvent contained therein. The invention allows to obtain reverse-osmosis membranes with high flow and high mechanical characteristics.