A study of composite membranes consisting of hydrargillite immobilized in a porous glass

Hydrargillite crystals were synthesized within the pores of a porous membrane (porous glass) from alumosilicate gel prepared by mixing solutions of sodium aluminate and sodium silicate diffusing from opposite sides. A study of the permeability of the composite membrane showed that virtually all the pores are sealed by the crystals grown within them. Dehydration above 200°C increases the permeability of the membrane by two orders of magnitude and subsequent rehydration does not restore the starting properties of the membrane.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2842–2845, December, 1990.