G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 27/12 (2006.01)
Patent
CA 2464037
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 welt 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 N2 adsorption of between about 8 to about 25 m2/g provide enhanced sensor film performance.
Gowling Lafleur Henderson Llp
Therm-O-Disc Incorporated
LandOfFree
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