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Carbon nanotube epoxy resin composite material electrode and preparation method and application thereof

A carbon nanotube and epoxy resin technology, which is applied in the field of tobacco chemistry, can solve the problems affecting the stability and service life of electrodes, the carbon nanotube modified layer is easy to fall off, the carbon nanotube modified layer is peeled off, etc., and achieves significant electrocatalytic activity. , the effect of low cost of raw materials and strong anti-pollution ability

Active Publication Date: 2021-08-06
CHINA TOBACCO YUNNAN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface modification method is to disperse carbon nanotube powder in a solvent, and then coat it on the surface of the base electrode, but because the carbon nanotube modification layer is easy to fall off in actual use, the stability of the electrode is not good, and the service life is not long
The paraffin oil mixed filling method is to mix carbon nanotube powder and paraffin oil and fill it in the electrode tube; however, the electrode body is a paste, which is a non-rigid material, and it will be deformed during use, and the noise and signal are heavy in electrochemical detection. Poor reproducibility, disposable electrode
The electrochemical polymerization surface modification method is to disperse carbon nanotubes in a conductive polymer monomer solution, form a surface modification layer through electrochemical polymerization, and fix the carbon nanotubes on the surface of the electrode; but the prepared electrode also has a carbon nanotube modification layer The problem of shedding affects the stability and service life of the electrode

Method used

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  • Carbon nanotube epoxy resin composite material electrode and preparation method and application thereof
  • Carbon nanotube epoxy resin composite material electrode and preparation method and application thereof
  • Carbon nanotube epoxy resin composite material electrode and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0043] Embodiment 1: Preparation of carbon nanotube epoxy resin composite electrode

[0044] Disperse 2 grams of commercial carbon nanotubes with a purity higher than 95% in a flask filled with 500 ml of concentrated nitric acid, heat treatment in a water bath at 60°C for 12 hours, and mechanically stir the mixture in the bottle at a speed of 120 rpm minute. After the nitric acid oxidation heat treatment mixture is cooled to room temperature, filter it under reduced pressure, and wash it with a large amount of water by means of a water pump, and continuously check with pH test paper until the pH value of the filtrate is higher than 5. Then, place the solid in the figure 2 In a metal box with air holes, dry at 110°C for 20 minutes to obtain nitric acid oxidation-treated carbon nanotubes.

[0045] The preparation process of the carbon nanotube epoxy resin composite electrode is shown in the appendix figure 1 . Mix the E51 type epoxy resin prepolymer and the supporting epoxy...

Embodiment 2

[0055]Example 2: A carbon nanotube epoxy resin composite electrode for voltammetric analysis of tobacco chemical components and its preparation method

[0056] Different from the electrode in Example 1, the area of ​​the working electrode used in various voltammetry analysis methods such as linear voltammetry analysis, cyclic voltammetry analysis, stripping voltammetry analysis, and differential pulse voltammetry analysis of tobacco chemical components is larger. The diameter of the circular electrode used is 1 to 6 millimeters, that is, the inner diameter of the electrode tube is required to be relatively large; at the same time, a carbon nanotube epoxy resin composite material mixture with a higher viscosity and a higher content of carbon nanotubes is used.

[0057] The preparation steps are the same as in Example 1. The difference is: weigh 1 gram of treated carbon nanotube powder and mix it with 1 gram of epoxy resin prepolymer containing curing agent, and stir thoroughly ...

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Abstract

The invention discloses a carbon nanotube epoxy resin composite material electrode which comprises an electrode body, an electrode tube and an electrode lead; one end of the electrode tube is filled with the electrode body, and the bottom of the electrode body is circular; the electrode lead is led out from the electrode body and is led out from the other end in the electrode tube; the electrode body is obtained by polycondensation of the carbon nanotube of a curing agent and epoxy resin, wherein the mass of the carbon nanotube is 10-50% of the mass of the electrode body. The invention also discloses a preparation method of the carbon nanotube epoxy resin composite material electrode and application of the carbon nanotube epoxy resin composite material electrode in detection of chemical components in tobacco. The carbon nanotube epoxy resin composite material electrode has the advantages of high sensitivity, good reproducibility, strong anti-pollution capability and the like.

Description

technical field [0001] The invention belongs to the technical field of tobacco chemistry, and in particular relates to a carbon nanotube epoxy resin composite electrode, its preparation method and application. Background technique [0002] In 1991, Iijima, Japan discovered carbon nanotubes for the first time. [1] , which has a needle-like tubular structure of graphitic carbon, and its carbon atoms form a coaxial cylinder with several to tens of layers. As a one-dimensional nanomaterial, carbon nanotubes have many unusual mechanical, electrical, and chemical properties due to their light weight and perfectly connected hexagonal structure. In recent years, with the in-depth research of carbon nanotubes and nanomaterials, their broad application prospects are constantly showing. Carbon nanotubes, also known as bucky tubes, are one-dimensional quantum materials whose radial dimensions are on the order of nanometers and axial dimensions are on the order of microns, and both end...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/02C08K3/04G01N27/327G01N27/49
CPCC08K9/02C08K3/041G01N27/3278G01N27/49C08K2201/011C08L63/00
Inventor 李振杰蒋昆明刘春波唐石云陈刚何沛夏建军韩莹向能军蒋薇苏钟璧
Owner CHINA TOBACCO YUNNAN IND
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