Detection of Explosive Vapors by Surface Acoustic Wave Sensors Containing Novel Siloxane Based Coatings

作者：Liu Sai; Ponrathnam Timothy; Sun Hongwei^*; Nagarajan Ramaswamy; Kumar Jayant; Gu Zhiyong; Kurup Pradeep

来源：Journal of Macromolecular Science Part A-Pure and Applied Chemistry, 2010, 47(12): 1172-1175.

DOI：10.1080/10601325.2010.518831

• Explosive vapors
• siloxane based coatings
• acoustic wave sensors

Surface acoustic wave (SAW) sensor was coated with a new chemoselective polymer to detect nitroaromatic explosives. Adsorption of the analyte influences the propagation of SAW and thus causes a shift in the resonant frequency of the SAW device. A novel azobenzene functionalized siloxane polymer was developed and applied to a surface acoustic wave (SAW) sensing device for the detection of explosive vapors such as 2,4-dinitrotoluene (DNT) and 2,4,6-trinitrotoluene (TNT). The experimental setup used for evaluating the response of this polymers-coatings is described in the paper. Experimental results indicate that the viscoelastic properties of the polymer coating is fairly insensitive to the temperature changes occurring in our experiments, which is ideal for SAW sensing device. The PDMS coating is able to detect DNT and TNT vapors.

• 出版日期2010