Preparation of high performance polyelectrolyte membrane

Details Preparation of high performance polyelectrolyte membrane Preparation of high performance polyelectrolyte membrane

1976-05-24

1978-04-11

Edmundson, F.C.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C25B 1308

Patent

active

040837688

ABSTRACT:
Novel polyelectrolyte membranes of substantially improved efficiency and durability are prepared from a preswollen film containing a relatively high amount of an insoluble cross-linked aromatic polymer. By preswelling the insoluble matrix under controlled conditions preferably to an equilibrium stage, the dissociable ion-exchange groups may be introduced more uniformly onto the aromatic nuclei of the matrix to a desired depth of the film. Controlled penetration of functional groups is important in preparing high performance cationic, anionic membranes as well as bipolar membranes. The membranes so prepared have low electrical resistance, improved current efficiency, undergo negligible degradation and with excellent durability.

REFERENCES:
patent: 3388080 (1968-06-01), de Korosy et al.
patent: 3562139 (1971-02-01), Leitz
patent: 3868314 (1975-02-01), Mizutani et al.
patent: 3887499 (1975-06-01), Hodgdon

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