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A colloidal electrolyte and amperometric hydrazine gas sensor for hydrazine gas detection

A technology of colloidal electrolyte and gas sensor, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems that the sensitivity and detection limit are not as good as water, it is difficult to overcome the volatilization speed of water, and the sensor life is short. Application prospect, high detection sensitivity effect

Active Publication Date: 2021-03-30
BEIJING INST OF AEROSPACE TESTING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current-type gas sensor in the gas sensor mainly uses the electrolyte of the water system. Due to the high saturated vapor pressure of water, the water in the sensor volatilizes quickly. Therefore, the sensor using the electrolyte of the water system usually has a short life. Electrolyte is also difficult to overcome the defect of fast water volatilization
In order to solve this technical defect, Cao Ye and others proposed an organic system using N-methyl-2 pyrrolidone as a solvent and tetraethylammonium tetrafluoroborate as an electrolyte. Solvent volatilization is relieved to a certain extent, but there is a new problem that the sensitivity and detection limit are not as good as those of the water system

Method used

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  • A colloidal electrolyte and amperometric hydrazine gas sensor for hydrazine gas detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Take 25g of newly distilled methyl methacrylate monomer and put it into a clean dry Erlenmeyer flask, add 25mg of thermal initiator benzoyl peroxide, heat in a water bath at 60°C, and shake the Erlenmeyer flask intermittently to carry out prepolymerization reaction After 1h, high molecular prepolymer was obtained;

[0060] Cool the reaction system to room temperature, add 75g of propylene carbonate (PC) and 100mg of lithium perchlorate, 0.5g of dibutyl phthalate, add 2.5g of newly distilled methyl methacrylate monomer, and stir until After complete dissolution, 55 mg of benzoyl peroxide was added and heated in a water bath at 60° C. for 10 h to obtain a colloidal electrolyte.

[0061] The ionic conductivity of the colloidal electrolyte is 1×10 -3 S cm -1 .

Embodiment 2

[0063] Take 25g of newly distilled methyl methacrylate monomer and put it into a clean dry conical flask, add 25 mg of thermal initiator benzoyl peroxide, heat in a water bath at 60°C, and shake the conical flask intermittently for 1 hour of prepolymerization Afterwards, high molecular prepolymer is obtained;

[0064] Cool the reaction system to room temperature, add 75g propylene carbonate (PC) and 10mg lithium perchlorate, 0.5g dibutyl phthalate, then add 2.5g newly distilled methyl methacrylate monomer, and stir until After complete dissolution, 55 mg of benzoyl peroxide was added and heated in a water bath at 60° C. for 10 h to obtain a colloidal electrolyte.

[0065] The ionic conductivity of the colloidal electrolyte is 5×10 -5 S cm -1 .

Embodiment 3

[0067] Take 25g of newly distilled methyl methacrylate monomer into a clean dry Erlenmeyer flask, add 25mg of thermal initiator azobisisobutyronitrile, heat in a water bath at 60°C, and intermittently shake the Erlenmeyer flask for prepolymerization After 1h, high molecular prepolymer was obtained;

[0068] Cool the reaction system to room temperature, add 75g of propylene carbonate (PC) and 50mg of lithium perchlorate, 0.5g of dibutyl phthalate, add 2.5g of newly distilled methyl methacrylate monomer, and stir until After complete dissolution, 55 mg of azobisisobutyronitrile was added and heated in a water bath at 60° C. for 10 h to obtain a colloidal electrolyte.

[0069] The ionic conductivity of the system is 4×10 -4 S cm -1 .

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Abstract

The invention belongs to the technical field of electrochemical sensors, in particular to a colloidal electrolyte for helium gas detection. The preparation raw material of the colloidal electrolyte for helium gas detection comprises an electrolyte, a polymer monomer, an organic solvent and a thermal initiator, and the preparation raw materials are mixed and subjected to thermal polymerization to obtain the colloidal electrolyte. The performance of the colloidal electrolyte provided by the invention is particularly suitable for preparing a current-type helium gas sensor with good stability, high detection sensitivity and excellent detection limit, and having good application prospect. The invention further relates to a current-type helium gas sensor provided with the colloidal electrolyte.

Description

technical field [0001] The invention belongs to the technical field of electrochemical sensors, and in particular relates to a colloidal electrolyte and an amperometric hydrazine gas sensor for hydrazine gas detection. Background technique [0002] Gas sensors have the advantages of fast response and low manufacturing cost. They have been developed rapidly in recent decades and have been widely used in the fields of chemistry, biology, environment and medicine. In addition, in the field of aerospace science and technology, gas sensors also show their unique characteristics in the detection of hydrazine rocket propellants. The current-type gas sensor in the gas sensor mainly uses the electrolyte of the water system. Due to the high saturated vapor pressure of water, the water in the sensor volatilizes quickly. Therefore, the sensor using the electrolyte of the water system usually has a short life. Electrolyte is also difficult to overcome the defect of fast water volatiliza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/407
CPCG01N27/4074
Inventor 郝龙方涛李弥异徐光赵全郑雪玲许宏韩卫济金朝旭李瑶张瑜吕立强
Owner BEIJING INST OF AEROSPACE TESTING TECH