Synthesis and evaluation of a new polysiloxane as SAW sensor coatings for DMMP detection

A new polysiloxane material, polymethyl[3-(2-hydroxy)phenyl] siloxane (PMPS), was synthesized. The PMPS is a linear polysiloxane polymer functionalized with o-allyl phenol group. The chemoselective polymer was spin-coated on a 434 MHz surface acoustic wave (SAW) device for detection of dimethyl meth...

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Published inSensors and actuators. B, Chemical Vol. 134; no. 2; pp. 409 - 413
Main Authors Du, Xiaosong, Ying, Zhihua, Jiang, Yadong, Liu, Zhongxiang, Yang, Taojun, Xie, Guangzhong
Format Journal Article
LanguageEnglish
Published Elsevier B.V 25.09.2008
Subjects
Chemoselective polymer
CWA
Humidity
SAW sensor
Chemoselective polymer
SAW sensor
CWA
Humidity
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Summary:A new polysiloxane material, polymethyl[3-(2-hydroxy)phenyl] siloxane (PMPS), was synthesized. The PMPS is a linear polysiloxane polymer functionalized with o-allyl phenol group. The chemoselective polymer was spin-coated on a 434 MHz surface acoustic wave (SAW) device for detection of dimethyl methylphosphonate (DMMP) vapor ranging from 5 to 40 ppm. It was found that the frequency shifts were linear to the vapor concentrations with a high sensitivity of 3 kHz/ppm. Fast response of 30 s and good reproducibility were achieved as well. The influence of humidity on the sensor response was also examined. The results showed that the sensitivity decreased about 1/2 when tested in 70% RH wet air than in dry nitrogen.
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content type line 23
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2008.05.016