PURPOSE: To impart selective permeability againt a fluid, by further providing a thin layer of a metal or a metal compound to a polymer membrane.
CONSTITUTION: A membrane obtained by depositing metal and a metal alloy ionized by inert gas ion on a polymer membrane or a hollow fiber membrane comprising polysulfone, polyacrylonitrile, polystyrene or an acrylonitrile copolymer has good adhesiveness with the polymer membrane and can be formed into a thin film. Therefore, hydrogen permeation per unit membrane area can be increased. In addition, even if a polymer which is the same as or different from support membrane is applied further on the obtained metal and the metal alloy, fine pulverization of a thin film can be prevented because of good adhesiveness. As the metal or the metal alloy, a mixture of rare earth metals, an alloy with other metals based on nickel or an alloy based on titanium are pref. used. When a silver thin layer is formed on a surface, oxygen permeability is improved.
TAKEGAMI SHINSUKE
HAMADA KAZUTO
| JPS55127124A | 1980-10-01 |