Yang Wang, Xiaosong Du, Yin Long, Yi Li, Yadong Jiang
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Detection of styrene by SAW sensor based on hydrogen-bond acidic polymer
In this paper, a surface acoustic wave (SAW) sensor coated with a hydrogen-bond acidic (HBA) polymer was introduced to detect styrene vapor. The polymer, PLF, a polysiloxane with a hexafluoroisopropanol functional group was synthesized by hydrosilylation reaction. And subsequently, PLF was dissolved in chloroform, and spray-coated on a 433.92 MHz two-port oscillator SAW device by an airbrush apparatus. Realtime responses of the obtained sensor to styrene vapor and some common interference vapors were studied. High sensitivity and selectivity of the sensor to styrene were demonstrated. The sensitivity was attributed to the OH/π hydrogen bond interaction between PLF and styrene.
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