Ion-exchange membranes structured in the thickness and...

Details Ion-exchange membranes structured in the thickness and... Ion-exchange membranes structured in the thickness and...

2011-03-08

2011-03-08

Yuan, Dah-Wei D (Department: 1727)

Chemistry: electrical current producing apparatus, product, and

Fuel cell, subcombination thereof, or method of making or...

Fuel cell with solid electrolyte

C429S493000

Reexamination Certificate

active

07901831

ABSTRACT:
Monolayer ion-exchange membrane structured in the thickness comprising ion-exchange sites covalently bonded to a support polymer, the membrane comprising two surface zones located on either side of a mid-zone, each surface zone having a thickness of not more than 15% of the total thickness of the membrane, in which the surface zones have a mean ion-exchange site density Dsurfacecalculated on the thickness of the surface zones of at least Dtotal.

REFERENCES:
patent: 5994426 (1999-11-01), Nezu et al.
patent: 6242123 (2001-06-01), Nezu et al.
patent: 2004 59752 (2004-02-01), None
Gupta, Bhuvanesh, Felix N. Buchi, Gunther G. Scherer, and Adolphe Chapiro. “Crosslinked Ion Exchange Membranes by Radiation Grafting of Styrene/divinylbenzene into FEP Films.” Journal of Membrane Science 118 (1996): 231-38.
Gupa, et al.,“Crosslinked Ion Exchange Membranes by Radiation Grafting of Styrene / Divinylbenzene into FEP Films”, Journal of Membrane Science, vol. 118, No. 2, pp. 231-238, 1996.

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