有机磷毒剂压电传感器敏感材料的制备及性能研究

Synthesis and Properties Research of a New Sensing Membrane of Piezoelectric Crystal Sensor of Organophosphorous Toxicant

以邻氟苯酚、3-溴丙烯与含氢硅油为原料,合成有机磷毒剂压电传感器敏感材料聚甲基[3-(2-羟基-3-氟)苯基]丙基硅氧烷。将聚甲基[3-(2-羟基-3-氟)苯基]丙基硅氧烷料涂覆在QCM传感器上,研究其对有机磷毒剂模拟剂甲基膦酸二甲酯(DMMP)和其它干扰气体的响应。结果表明,在13.2×10-6～65.8×10-6范围内,传感器对DMMP的响应成呈好的线性关系,灵敏度为9.369×106Hz,最低检测极限为0.323×10-6(S/N=3),对DMMP的响应远高于其它干扰气体。

A new material,poly{methyl[3-（2-hydroxy-3-fluoro）phenyl]propyl siloxane}, which is sensitive to toxic organophosphate vapor, is synthesized with 2-fluorophenol, allyl bromide and poly methyl hydrosiloxane as raw materials. The poly{methyl[-3-（2-hydroxy-3-fluoro）phenyl]propyl siloxane} is coated on quartz crystal microbalance （QCM） to investigate its gas sensitive properties to dimethyl methylphosphonate （DMMP） vapor, a stimulant of nerve agents, and other interfering vapors. The poly{methyl[3-（2-hydroxy-3-fluoro） phenyl]propyl siloxane}-QCM sensor responds linearly to DMMP vapor with a slope of 9.369×10^6 Hz in the 13.2×10^-6-65.8×10^-6 range and the limit of detection of 0.323×10^-6. When tested with saturated vapors, the sensor is more sensitive to DMMP than to other interfering vapors.