Deliquescent-polyelectrolyte-based full-solid-state ethanol gas sensor enzyme electrode and manufacturing method thereof

A gas sensor and polyelectrolyte technology, which is applied in the direction of instruments, scientific instruments, and electrochemical variables of materials, can solve problems such as unfavorable miniaturization, intelligence and integration, electrolyte evaporation or leakage, and sensor signal attenuation to improve response Selectivity, low cost, and stability-enhancing effects

Active Publication Date: 2013-02-27
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the study of biogas sensors, at present, it mainly relies on the enzyme-catalyzed reaction on the gas / liquid interface to carry out (Anal.Chem, (1994), 66, 3297-3302; Sens.Actuators B, (2002), 83, ( 1-3), 35-40; Sens. Actuators B, (2005), 108, (1-2), 639-645; Sens. Actuators B, (2000), 70, (1-3), 182-187 ; Biosens. & Bioelectron., (2002), 17, (5), 389-394; Biosens. Bioelectron., (2002), 17, (5), 427-432; Sens. Actuators B, (2001), 81, (1), 107-114; Biosens.Bioelectron., (2002), 17, (9), 789-796), has not really realized the detection of gas samples in the gas phase, and these methods will inevitably cause electrolyte evaporation or leakage , leading to the attenuation of the sensor signal (Sens.Actuators B, (2005), 107, 812-817), and the device preparation is complicated, which is not conducive to miniaturization, intelligence and integration

Method used

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  • Deliquescent-polyelectrolyte-based full-solid-state ethanol gas sensor enzyme electrode and manufacturing method thereof
  • Deliquescent-polyelectrolyte-based full-solid-state ethanol gas sensor enzyme electrode and manufacturing method thereof
  • Deliquescent-polyelectrolyte-based full-solid-state ethanol gas sensor enzyme electrode and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Preparation of deliquescent polyelectrolyte

[0031] a. In a 100mL three-necked flask, add 0.2mol of diethylenetriamine and 0.2mol of methyl acrylate into 25mL of methanol and react for 12h; React for 1 hour, react for 2 hours at 100°C, react for 3 hours at 120°C, and react for 2 hours under reduced pressure at 140°C. Polyamide;

[0032] b. In a 100mL three-necked flask, mix 5g of hyperbranched polyamide with 50mL of deionized water, 35g of formic acid and 35g of formaldehyde, reflux at 75°C for a certain period of time, then wash with ether for several times, precipitate and dry in vacuum;

[0033] c. Dissolve the product in b above in 50 mL of methanol, then add 10.32 g of n-bromobutane, and react at 50°C for 48 hours. The product is dissolved in methanol, purified by ether precipitation, and vacuum-dried to obtain a deliquescent polyelectrolyte.

[0034] 2) Clean the ceramic substrate with working electrode (diameter 4mm), silver / silver chloride reference electr...

Embodiment 2

[0038] 1) Preparation of deliquescent polyelectrolyte

[0039] a. In a three-necked flask, add 0.4mol of diethylenetriamine and 0.4mol of methyl acrylate into 50mL of methanol and react for 12h; then raise the temperature to 30°C for 1h under reduced pressure and react at 60°C 1h, react at 100°C for 2h, react at 120°C for 3h, and react at 140°C for 2h under reduced pressure. amides;

[0040] b. In a three-necked flask, mix 10g of hyperbranched polyamide with 100mL of deionized water, 70g of formic acid and 70g of formaldehyde, reflux at 75°C for a certain period of time, then wash and precipitate with ether several times, and dry in vacuo;

[0041] c. Dissolve the product in b above in 100mL of methanol, then add 24.86g of n-bromohexane, react at 50°C for 24h, dissolve the product in methanol, purify it by diethyl ether precipitation for several times, and dry it in vacuum to obtain a deliquescent polyelectrolyte.

[0042] 2) Clean the ceramic substrate with working electrode ...

Embodiment 3

[0046] 1) Preparation of deliquescent polyelectrolyte

[0047] a. In a three-necked flask, add 0.2 mol of diethylenetriamine and 0.2 mol of methyl acrylate to 25 mL of methanol, slowly add 0.2 mol of methyl acrylate dropwise under stirring, and react for 12 hours; then under reduced pressure , heated up to 30°C for 1h, reacted at 60°C for 1h, reacted at 100°C for 2h, reacted at 120°C for 3h, and reacted at 140°C for 2h under reduced pressure. washing in ether, precipitation, and vacuum drying to obtain hyperbranched polyamide;

[0048] b. In a three-necked flask, mix 5g of hyperbranched polyamide with 50mL of deionized water, 35g of formic acid and 35g of formaldehyde, reflux at 75°C for a certain period of time, then wash and precipitate with ether several times, and dry in vacuum;

[0049] c. Dissolve the product in b above in 50 mL of methanol, then add 10.32 g of n-bromobutane, and react at 50°C for 72 hours. The product is dissolved in methanol, purified by ether precipi...

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Abstract

The invention relates to a deliquescent-polyelectrolyte-based full-solid-state ethanol gas sensor enzyme electrode and a manufacturing method thereof. The manufacturing method comprises the following steps: on a matrix made of an insulating material, preparing a printed electrode composed of a working electrode, a reference electrode and a counter electrode by screen printing technology; coating a polycarbonate insulator on the surfaces in the middle; coating a reaction layer composed of graphene, deliquescent polyelectrolyte and alcohol oxidase on the working electrode; and coating a deliquescent solid polymer film among the working electrode, counter electrode and reference electrode to obtain the biological enzyme electrode. The invention provides an enzyme electrode for gas-state ethanol detection; and the enzyme electrode can implement high-selectivity detection of ethanol gas without using any liquid electrolyte in the use process, thereby integrally enhancing the properties and practicality of the ethanol gas biosensor.

Description

technical field [0001] The invention relates to an all-solid ethanol gas sensor enzyme electrode based on deliquescent polyelectrolyte and a manufacturing method thereof. Background technique [0002] As human beings pay more and more attention to their own health and the ecological environment, higher requirements are put forward for the monitoring and control of gases, which provides opportunities and challenges for the research, development and production of gas sensors, and also brings great challenges to gas sensors. New research topics are proposed. In order to meet these requirements, the gas sensor must have high sensitivity and selectivity, good repeatability and stability, can be mass-produced, and cost-effective. However, due to the limitations of the traditional gas sensor materials, the specific selectivity of a single gas sensor is relatively poor. The selective recognition of gases, even so, its overall performance still depends on the performance of a singl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/327
Inventor 王会才于璐洋王楠
Owner TIANJIN POLYTECHNIC UNIV
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