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    • 5. 发明授权
    • Vapor sensor and materials therefor
    • 蒸汽传感器及其材料
    • US07138090B2
    • 2006-11-21
    • US10411805
    • 2003-04-11
    • Edward J Blok
    • Edward J Blok
    • G01N31/00
    • G01N27/126Y10T428/25Y10T428/252Y10T428/31663
    • 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 N2 adsorption of between about 8 to about 25 m2/g provide enhanced sensor film performance.
    • 本发明涉及用于检测传感器内的化学分析物的传感器膜的组合物,例如聚合物吸收化学电阻(即电导率传感器)。 本发明提供了具有较高温度稳定性和对化学分析物的敏感性的传感器膜组合物,以及制备这些传感器膜的方法。 根据本发明的传感器膜组合物包括交联硅氧烷聚合物,其包含具有大于或等于2个碳原子的烃侧基的单体和分布在聚合物内的多个导电颗粒。 替代的优选实施方案通过交联的硅氧烷聚合物分配包含具有至少一个具有大于或等于两个碳的侧基的硅氧烷的油,其中所述油通过交联的聚硅氧烷共聚物分布。 此外,具有约8至约25m 2 / g的N 2 N 2吸附的导电颗粒提供增强的传感器膜性能。