Acoustic wave h2s sensor comprising a polymer film comprising carboxylate functional groups and lead or zinc cations and manufacturing process

Patent metadata

Field	Value
Publication number	US-2018071780-A1
Application number	US-201715702652-A
Country	US
Kind code	A1
Filing date	Sep 12, 2017
Priority date	Sep 13, 2016
Publication date	Mar 15, 2018
Grant date	—

Abstract

An H 2 S sensor comprising at least one acoustic wave transducer and a film comprising a polymer matrix comprises carboxylate functional groups and lead or zinc cations. Processes for the manufacture of the sensor are also provided.

First claim

1 . An H 2 S sensor, comprising at least one acoustic wave transducer and a film comprising a polymer matrix comprising carboxylate functional groups and lead or zinc cations.

2 . The sensor according to claim 1 , comprising an antenna which makes it possible to remotely interrogate the said sensor.

3 . The sensor according to claim 1 , wherein the film exhibits a thickness of between about a hundred nanometres and a few microns.

4 . The sensor according to claim 1 , wherein the polymer corresponds to the following chemical formula:

with n, m and p integers.

5 . The sensor according to claim 1 , wherein the polymer corresponds to the following chemical formula:

with n, m and p integers.

6 . The sensor according to claim 1 , wherein the polymer corresponds to the following chemical formula:

with n, m and p integers.

7 . The sensor according to claim 1 , wherein the film exhibits a thickness of between 1 and 5% of the acoustic wavelength.

8 . The sensor according to claim 7 , wherein the film exhibits a thickness of between 250 nm and 5 μm.

9 . The sensor according to claim 1 , wherein the transducer is a surface acoustic wave transducer.

10 . The sensor according to claim 9 , comprising a delay line comprising at least one surface acoustic wave transducer and a mirror.

11 . The sensor according to claim 9 , comprising a transducer positioned between two mirrors, the said sensitive layer being positioned between the said transducer and one of the said mirrors.

12 . The sensor according to claim 1 , wherein the transducer is a volume acoustic wave or Lamb acoustic wave transducer.

13 . The sensor according to claim 1 , wherein the transducer comprises a substrate made of lithium niobate or made of lithium tantalate.

14 . A process for the manufacture of a sensor according to claim 1 , comprising the preparation of the said polymer film which comprises the following steps:
the deposition at the surface of a substrate of monomer formed of a lead or zinc carboxylate complex and a polymerizable functional group, which can be of chemical formula:

the polymerization of the said monomer.

15 . The process for the manufacture of a sensor according to claim 1 , comprising:
the synthesis of a polymer of chemical formula:

with n, m and p integers;
the deposition on a substrate of a film of the said polymer synthesized beforehand.

16 . The process for the manufacture of a sensor according to claim 1 , comprising:
the synthesis of a polymer of chemical formula:

with n, m and p integers;
the said synthesis being carried out by polycondensation or polyaddition or polyelimination of a monomer containing a lead or zinc carboxylate complex and a difunctional molecule;
the deposition on a substrate of a film of the said polymer synthesized beforehand.

17 . An H 2 S detection device comprising:
a sensor according to claim 1 ; radiofrequency interrogation means; means for detecting the response of the said sensor.

18 . The device according to claim 17 , comprising means for analysis of the speed or of the insertion losses of the acoustic wave in order to identify the presence of the compound H 2 S.

Assignees

• Senseor
• Centre Nat Rech Scient
• Total Sa
• Univ Franche Comte

Inventors

• Friedt Jean-Michel
• CHERIOUX Frédéric
• Lamare Simon
• Gegot François

Classifications

• B32B27/40

  comprising polyurethanes · CPC title

• G01N29/2412

  using the magnetostrictive properties of the material to be examined, e.g. electromagnetic acoustic transducers [EMAT]; (investigating the presence of flaws using eddy currents G01N27/90, magnetostrictive transducers B06B1/08, measuring magnetostrictive properties G01R33/18) · CPC title

• B06B1/0261

  taken from a transducer or electrode connected to the driving transducer · CPC title

• B32B27/34

  comprising polyamides · CPC title

• C01G21/00

  Compounds of lead · CPC title