Process of wetting hydrophobic fluoropolymer separators

Details Process of wetting hydrophobic fluoropolymer separators Process of wetting hydrophobic fluoropolymer separators

C - Chemistry, Metallurgy

25

B

204/202, 18/32,

C25B 1/46 (2006.01) C25B 13/08 (2006.01) H01M 2/14 (2006.01)

Patent

CA 1192861

ABSTRACT Hydrophobic polymeric separators are made wett- able to electrolytic cell fluids by a post-manufacturing process of treating with fluorinated surface-active agents' the application of a hydrophilic film of fluoro- surfactant onto separator surfaces followed by drying renders the separator permanently wettable; the hydro- philic surfaces rendered inert by drying are reactivated in-situ after installation of the separator by contacting the separator surfaces with heated aqueous solution, the pre-installation process provides a convenient means for shipping fully manufactured separators and makes possible their storage by users until actually needed: from an operational standpoint, the pre-installation process eliminates fouling of the cell with foam occurring with conventional in-situ wetting procedures.

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