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Preparation method of molecular imprinting electrochemical sensor for nitrocellulose

A technology of nitrocellulose and molecular imprinting, applied in the direction of material electrochemical variables, scientific instruments, instruments, etc., can solve the problems that X-rays cannot detect nitrocellulose, follow-up processing is cumbersome, and the instrument is bulky, etc., to achieve mild conditions, The effect of simple preparation method and low detection cost

Active Publication Date: 2016-06-22
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The instruments used in the above method are large in size, complex in structure, expensive in cost, and the follow-up processing is cumbersome, so it is not easy to popularize
At present, the security inspection department mainly uses X-ray equipment to conduct safety inspections on items, but X-rays cannot detect nitrocellulose

Method used

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  • Preparation method of molecular imprinting electrochemical sensor for nitrocellulose
  • Preparation method of molecular imprinting electrochemical sensor for nitrocellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of nitrocellulose molecularly imprinted polymers:

[0021] Accurately weigh NC0.3107g, add 30mL acetone to dissolve. After the NC was completely dissolved, 0.28mL (3.33mmol) of MAA and 1mL (5.31mmol) of EGDMA were added, and the mixture was ultrasonically oscillated for 10min at room temperature to fully contact the template NC with the monomer MAA and the cross-linking agent EGDMA.

[0022] Pour the ultrasonically oscillated liquid into a 4-neck flask, add 0.2189 g (1.33 mmol) of initiator AIBN, and fix it on the iron stand supporting the constant temperature water tank. Install the condenser tube and the stirring paddle, turn on the power of the agitator, change the speed, and adjust the stirring paddle to make it in a suitable position. Vacuum the polymerization system, wait for the vacuum degree to exceed 0.1Mpa and last for one minute, indicating that the system has basically reached the vacuum condition, connect the nitrogen pipe, and fill the polymer...

Embodiment 2

[0028] Preparation of nitrocellulose molecularly imprinted polymers:

[0029] Accurately weigh NC0.3115g, add 30mL acetone to dissolve. After the NC was completely dissolved, 0.28mL (3.33mmol) of MAA and 2mL (10.61mmol) of EGDMA were added, and the mixture was ultrasonically oscillated for 10min at room temperature to fully contact the template NC with the monomer MAA and the cross-linking agent EGDMA.

[0030] Pour the ultrasonically oscillated liquid into a 4-necked flask, add 0.2187 g (1.33 mmol) of initiator AIBN, and fix it on the iron frame supporting the constant temperature water tank. Install the condenser tube and the stirring paddle, turn on the power of the agitator, change the speed, and adjust the stirring paddle to make it in a suitable position. Vacuum the polymerization system, wait for the vacuum degree to exceed 0.1Mpa and last for one minute, indicating that the system has basically reached the vacuum condition, connect the nitrogen pipe, and fill the poly...

Embodiment 3

[0034] Preparation of nitrocellulose molecularly imprinted polymers:

[0035] Accurately weigh NC0.3115g, add 30mL acetone to dissolve. After the NC was completely dissolved, 0.28mL (3.33mmol) of MAA and 4mL (21.24mmol) of EGDMA were added, and the mixture was ultrasonically oscillated for 10min at room temperature to fully contact the template NC with the monomer MAA and the cross-linking agent EGDMA.

[0036] Pour the ultrasonically oscillated liquid into a 4-necked flask, add 0.2187 g (1.33 mmol) of initiator AIBN, and fix it on the iron frame supporting the constant temperature water tank. Install the condenser tube and the stirring paddle, turn on the power of the agitator, change the speed, and adjust the stirring paddle to make it in a suitable position. Vacuum the polymerization system, wait for the vacuum degree to exceed 0.1Mpa and last for one minute, indicating that the system has basically reached the vacuum condition, connect the nitrogen pipe, and fill the poly...

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Abstract

The invention discloses a preparation method of a molecular imprinting electrochemical sensor for nitrocellulose. The preparation method of the molecular imprinting electrochemical sensor for the nitrocellulose comprises the following steps of adding methacrylic acid, an initiator and a cross-linking agent into an acetone solution of the nitrocellulose to carry out polymerization, after a reaction is completed, drying, grinding and refining a polymer, removing template nitrocellulose by using mixed liquor of methanol and acetic acid, so as to obtain molecularly imprinted polymethylacrylic acid powder of the nitrocellulose, afterwards, modifying a glassy carbon electrode by adopting a molecularly imprinted polymethylacrylic acid solution of the nitrocellulose, and realizing the detection of the nitrocellulose through detecting the change of an electrochemical signal before and after the immerging in a nitrocellulose solution. The molecular imprinting electrochemical sensor for the nitrocellulose, which is prepared by the method provided by the invention, is simple to operate, is high in sensitivity, and has important meaning to the quick detection of the nitrocellulose in inflammable and explosive materials.

Description

technical field [0001] The invention belongs to the technical field of electrochemical sensors, and relates to a preparation method of a nitrocellulose molecularly imprinted electrochemical sensor. Background technique [0002] Nitrocellulose (Nitrocellulose, NC) is the product of cellulose and nitrate esterification, also known as nitrocellulose, cotton collodion, is a white fibrous polymer. The application of nitrocellulose is mainly divided into two parts: military and civilian. The military part is concentrated in the weapons, fire and explosives industry, and military product management is implemented. The civilian part is used in coatings, celluloid, artificial fibers, film film inks, cosmetics and other fields. Nitrocellulose can spontaneously ignite when exposed to air, and it is very easy to burn and explode when exposed to open flames and high heat. It can react strongly with oxidants and most organic amines, causing combustion or explosion. [0003] Years ago, Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01N27/30
CPCG01N27/308G01N27/48
Inventor 肖正刚杨艳孟祥军
Owner NANJING UNIV OF SCI & TECH