Vapor sensor and materials therefor

Details Vapor sensor and materials therefor Vapor sensor and materials therefor

2006-11-21

2006-11-21

Warden, Jill (Department: 1743)

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing liquid or solid sample

C422S050000, C422S051000, C422S051000, C422S068100, C422S082020, C422S082030, C436S149000

Reexamination Certificate

active

07138090

ABSTRACT:
The present invention relates to a composition for sensor films used for detecting chemical analytes within sensors, such as polymer-absorption chemiresistors (i.e. conductometric sensors). The present invention provides sensor film compositions that have greater temperature stability and sensitivity to chemical analytes, as well as methods of making these sensor films. Sensor film compositions according to the present invention include a crosslinked siloxane polymer comprising a monomer having a hydrocarbon side group with greater than or equal to two carbon atoms and a plurality of conductive particles distributed within the polymer. Alternate preferred embodiments distribute an oil comprising siloxane having at least one side group with greater than or equal to two carbons through a crosslinked siloxane polymer, wherein the oil is distributed through a crosslinked polysiloxane copolymer. Further, conductive particles having a N2adsorption of between about 8 to about 25 m2/g provide enhanced sensor film performance.

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