Gas sensors and methods of sensing a gas-phase analyte

A gas sensor and phase analysis technology, applied in the field of gas sensors, which can solve problems such as sensor drift and loss of sensing performance

Pending Publication Date: 2021-01-08
ROHM & HAAS ELECTRONICS MATERIALS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, it has been found that during long-term operation, analyte binding can lead to sensor drift and loss of sensing performance by reducing the response signal and / or prolonging the response time

Method used

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  • Gas sensors and methods of sensing a gas-phase analyte
  • Gas sensors and methods of sensing a gas-phase analyte
  • Gas sensors and methods of sensing a gas-phase analyte

Examples

Experimental program
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Effect test

example

[0068] Sensing polymer synthesis

[0069] The following polymers A-E were synthesized using the procedure described below. Number average molecular weight (M n ), weight average molecular weight (M w ) and polydispersity (PDI=M w / M n ) are reported as determined by gel permeation chromatography (GPC) based on polystyrene standards. Polymer F is produced by Dupont Electronics & Imaging as SiLK TM J Polyarylene Resins Sales of Commercial Materials.

[0070] Polymer A

[0071]

[0072] Polymer B

[0073]

[0074] Polymer C

[0075]

[0076] Polymer D

[0077]

[0078] Polymer E

[0079]

[0080] Polymer F

[0081]

Synthetic example 1

[0083] At room temperature, a 4-liter cylindrical reactor was charged with 485.010 g of dibenzofuranbis(triphenylcyclopentadienone) (DPO-CPD), 27.370 g of 3,5-diethynylbenzoic acid (DEBzOH) and 2422g gamma-butyrolactone (GBL). Then a dry ice condenser, a thermocouple with a temperature controller, N 2 Inlet and stirring system. Place the reactor in a suitable heating mantle. Evacuate the system and use N 2 Purge three times to remove air from the vessel, followed by a constant flow of N 2 to override it. The reaction system was then heated to an internal temperature of 135°C. After 1 hour, the system was cooled to 90°C, then a second aliquot (27.780 g) of DEBzOH was added to the flask, along with an additional 300 g of GBL. The reaction mixture was reheated to 135°C and maintained at this temperature for 1 hour. The system was allowed to cool again to 90°C, then a third aliquot (27.110 g, 0.25 equiv) of DEBzOH was added to the flask, along with an additional 330 g of GB...

Synthetic example 2

[0085] DPO-CPD (109.42 g) and 1,3-diethynylbenzene (18.34 g) were added to a 1 L OptiMax reactor (glass lined with Teflon TM Fluoropolymer drain plug). Ethoxybenzene solvent (309 g) was added to form a dark maroon heterogeneous mixture. The reactor was transferred to an OptiMax synthesis workstation and sealed under a nitrogen atmosphere. A stirrer with 4-blade stirrer (raised to 1 cm from the bottom of the reactor), a water-cooled reflux condenser, an internal thermocouple (placed at the middle depth of the mixture, radially placed between the stirrer shaft and the reaction middle of the vessel wall) and a 1 cm baffle (placed vertically and adjacent to the outer wall of the reactor). The internal temperature of the reactor was set to 25°C and stirring was started at 100 rpm to mix the heterogeneous contents. After equilibrating at 25°C for 30 minutes, the reactor was heated at a rate of 1°C / min until the internal temperature reached 115°C to 135°C. The reactor was maintai...

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Abstract

Gas sensors are provided. The gas sensor comprises: a substrate; a plurality of electrodes on the substrate; and a polymeric sensing layer on the substrate for adsorbing a gas-phase analyte. The adsorption of the analyte is effective to change a property of the gas sensor that results in a change in an output signal from the gas sensor. The polymeric sensing layer comprises a polymer chosen from substituted or unsubstituted polyarylenes comprising the reaction product of monomers comprising a first monomer comprising an aromatic acetylene group and a second monomer comprising two or more cyclopentadienone groups, or a cured product of the reaction product. The gas sensors and methods of using such sensors find particular applicability in the sensing of gas-phase organic analytes.

Description

technical field [0001] The present invention relates generally to gas sensors for sensing gas phase analytes. More specifically, the present invention relates to gas sensors comprising polymeric sensing layers, and to methods of sensing analytes using such sensors. The gas sensors and sensing methods are particularly useful for the sensing of gas phase analytes such as organic gas phase analytes. Background technique [0002] The detection of gas phase analytes is important for a variety of applications in both industrial and consumer market sectors. Gas sensors have been used, for example, for the detection of toxic and flammable gases and vapors (collectively referred to as gases), for the monitoring and control of coating thickness measurements during vacuum deposition, and for humidity monitoring. Recently, the focus on gas sensors has extended to the consumer electronics market, such as mobile phones, Internet of Things (IoT), and wearable device applications. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/02G01N27/22G01N27/12G01N29/036
CPCG01N29/022G01N29/036G01N27/227G01N27/126G01N2291/0255G01N2291/0256G01N2291/0422G01N2291/0426G01N2291/0423G01N2291/021G01N2291/014G01N29/2443C08G61/12C08G2261/124C08G2261/1414C08G2261/1426C08G2261/146C08G2261/1642C08G2261/312C08G2261/344C08G2261/76C08G2261/94C09D165/00C08G2261/148C08G2261/316G01N21/359G01N21/3504G01N27/04G01N27/22G01N29/02C08G61/02G01N2021/3595G01N31/223G01N21/77C08G65/34G01N21/65G01N23/2273G01N27/12G01N2223/07
Inventor C·穆尔泽C·D·吉尔莫H·J·尹J·墨菲B·利奇菲尔德
Owner ROHM & HAAS ELECTRONICS MATERIALS LLC
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