Composite membrane

Details Composite membrane Composite membrane

1988-06-15

1990-02-20

Spear, Frank

Gas separation

Means within gas stream for conducting concentrate to collector

210638, 21050036, B01D 5322

Patent

active

049023080

ABSTRACT:
A porous composite membrane is provided comprising a film of porous, expanded polytetrafluoroethylene whose surfaces, both exterior and within its pores, are coated with a metal salt of a perfluoro-cation exchange polymer. Also provided is the method of avoiding false-positive detection of the presence of organic nerve gas agents by a sensor adapted to detect such presence by employing in the sensor a porous composite membrane comprising a film of porous, expanded polytetrafluoroethylene whose surfaces, both exterior and within its pores, are coated with a metal salt of a perfluoro-cation exchange polymer, the composite acting as a scavenger of unwanted gas components which cause the false-positive signals.

REFERENCES:
patent: 4423157 (1983-12-01), Masuda
patent: 4490484 (1984-12-01), Bissut et al.
patent: 4666468 (1987-05-01), Wu

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