| 摘要 |
PURPOSE:To obtain a cation exchange membrane having a metal uniformly and fixedly deposited on the surface thereof, by a method wherein the metal is deposited on the surface of a perfluorocarbon polymer membrane having a group convertible to a cation exchange group under pressure prior to embedding a reinforcing material and the aforementioned group is converted to the cation exchange group at last. CONSTITUTION:In electrolysis of an aqueous solution, especially an alkali metal halide aqueous solution due to an ion exchange membrane method, an ion exchange membrane used in dividing an electrolytic means into an anode and a cathode chambers is constituted from a perfluorocarbon polymer membrane having a group convertible to a cation exchange group and a metal is fixedly deposited on the single surface of this membrane under pressure, for example, by a method wherein the membrane and a metal powder are simultaneously passed between two rolls. In the next step, a reinforcing material such as a net made of a polytetrafluoroethylene fiber is embedded in the membrane from the surface opposite to the metal fixedly deposited surface. Subsequently, the group convertible to the cation exchange group possessed by the membrane is converted to the cation exchange group to obtain an objective cation exchange membrane. This membrane can be used in the electrolysis of an alkali halide aqueous solution for a long period of time without peeling the metal layer. |
