Porous separatory member entirely made of polyphenylene sulfide

Details Porous separatory member entirely made of polyphenylene sulfide Porous separatory member entirely made of polyphenylene sulfide

1988-06-14

1990-01-23

Niebling, John F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204129, 521 27, 521 30, 521 33, 521 38, 528373, C25B 1308

Patent

active

048956341

ABSTRACT:
A porous separator, to be used in electrolyzers for producing hydrogen and oxygen by water electrolysis, consists of a fabric or felt entirely made of polyphenylene sulfide (PPS). In order to reduce the voltage drop caused by the separator, the PPS polymeric chain can be made ionically active by the presence thereon of polar groups, such as sulfonic, carboxylic or phosphonic groups.
The method for producing the separator comprises the preparation, according to conventional weaving or felt manufacturing techniques, of a fabric or felt entirely made of PPS and the subsequent functionalization for introducing polar groups in the polymeric chain. The functionalization can be carried out either on the starting material, such as PPS polymer powder or flakes, or in any other step of the production of fabric or felt.

REFERENCES:
patent: 4110265 (1978-08-01), Hodgdon
patent: 4707228 (1987-11-01), Rubak

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