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Method for achieving environmental protection and high yield of composite modified carbon nanotubes and products

A carbon nanotube, high-yield technology, applied in the direction of carbon nanotubes, nanocarbons, chemical instruments and methods, etc., can solve the problems of ineffective combination of carbon tubes and other materials, reduced conductivity and surface functionality of carbon tubes, and surface activity It is difficult to remove the agent and other problems, so as to achieve good oxidation modification effect, improve safety and environmental protection, and achieve the effect of low cost

Pending Publication Date: 2019-04-12
THE UNIV OF NOTTINGHAM NINGBO CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to effectively oxidize and modify carbon nanotubes while reducing pollutant gas emissions, maintaining the integrity of carbon tubes, solving the difficulty of filtration, and improving the physical treatment process. Surfactants are difficult to remove , The dispersion effect of carbon tubes is limited, the conductivity and surface functionality of carbon tubes are reduced, and the disadvantages of carbon tubes and other materials cannot be effectively combined

Method used

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  • Method for achieving environmental protection and high yield of composite modified carbon nanotubes and products
  • Method for achieving environmental protection and high yield of composite modified carbon nanotubes and products
  • Method for achieving environmental protection and high yield of composite modified carbon nanotubes and products

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Such as figure 1 As shown, a method for modifying carbon nanotubes to improve the yield in an environment-friendly manner, the specific steps are as follows:

[0054] Step 1 (pre-interruption treatment): Add 150g of alumina balls, 1g of carbon tubes, and 15mL of deionized water to two identical ball milling jars; place the two ball milling jars symmetrically Set at 600rpm / h, and set the time for 3 hours; after ball milling for 3 hours, pour the mixture in the tank onto a sieve with a suitable mesh, rinse with deionized water, and separate the carbon tube and alumina ball; The mixture of tubes and water is placed on a G4 sand core funnel, and the carbon tubes and water are separated using a vacuum filtration device. The carbon tubes obtained in the preceding steps were dried in a drying oven at 50° C. for 24 hours, and the treated carbon tube powder was obtained after grinding.

[0055] Step 2 (airtight container reaction): Weigh 80 mg of ball-milled carbon tubes and p...

Embodiment 2

[0062] A method for modifying carbon nanotubes to improve yield in an environment-friendly way, the specific steps are as follows:

[0063] Step 1 (pre-interruption treatment): place 1g of carbon tubes and 30mL of deionized water in a beaker, place the above beaker in an ultrasonic water tank, and perform ultrasonication for 1 hour with an ultrasonic power of 600W; fix the beaker in the cavity of the cell disruptor , set the ultrasonic power to 500W, and set the time to 12min; after the end, use a G4 sand core funnel to separate the treated carbon tubes from water, and clean them with deionized water; place the carbon tubes obtained in the previous steps in a drying oven at 50°C Drying in medium temperature for 12 hours, grinding and pulverizing to obtain treated carbon tubes.

[0064] Step 2 (airtight container reaction): Weigh 120 mg of the above-mentioned pre-interrupted carbon tube and place it in a 25 mL beaker, slowly add 9 mL of sulfuric acid (7 mL of concentrated sulfu...

Embodiment 3

[0068] A method for modifying carbon nanotubes to improve yield in an environment-friendly way, the specific steps are as follows:

[0069] Step 1 (pre-interruption treatment): Place 500mg of carbon tubes and 20mL of deionized water in a beaker; place the above beaker in an ultrasonic tank, ultrasonicate for 0.5 hours, with an ultrasonic power of 600W; place and fix the beaker on the probe of the emulsification machine bottom, so that the probe can penetrate into the mixture but not touch the bottom of the beaker; set the power of the emulsifier to 1000W, and set the time to 3min; after the experiment, use the G4 sand core funnel to separate the treated carbon tube from the water, and Washing with water; drying the carbon tubes obtained in the above steps in a drying oven at 50° C. for 12 hours, and then grinding and pulverizing to obtain the treated carbon tubes.

[0070] Step 2 (airtight container reaction): Weigh 180 mg of pre-interrupted carbon tubes and place them in a 25...

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Abstract

The invention discloses a method for achieving environmental protection and high yield of composite modified carbon nanotubes and products. The carbon tubes are pre-broken to break the original diameter structure of the carbon tubes, the number of the ports of the carbon tubes is increased, the contact surface of the carbon tubes and an oxidant is increased, the appropriate oxidant is added afterthe pre-broken carbon tubes and in a solution containing sulphuric acid are dispersed in an ultrasonic machine, the mixture is heated in a closed reactor at a certain temperature for a certain periodof time, after reaction, a filter device is used for washing the modified carbon tubes, and the carbon tube samples are collected after filtration, dried and stored or directly prepared into water system dispersion liquid for storage. Compared with the prior art, pollution can be reduced, the oxidation of the carbon tubes can be effectively controlled, the dispersion of the carbon tubes in water is improved, and the yield of the process is high. Meanwhile, the processed carbon tubes have small structural damage, the surfaces of the carbon tubes contain a large number of oxygen-containing groups which facilitate the combination of the carbon tubes with other materials, and various physical and chemical properties of the carbon tubes can be effectively given full play to.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to an environment-friendly and high-yield method for modifying carbon nanotubes. Background technique [0002] Multi-walled carbon nanotubes (hereinafter referred to as carbon tubes) are very important and widely used carbon materials. Since the discovery of carbon tubes, due to their unique tubular hollow structure, excellent electrical and thermal conductivity, high specific surface area, excellent mechanical properties, and light weight, they have become research hotspots in various disciplines. Among the many applications of carbon tubes, as an ideal precursor or frame material for various composite materials is one of the more popular applications. Although the unique structure of original carbon tubes endows it with many natural advantages, due to the large aspect ratio of carbon tubes, carbon tubes are easily entangled and agglomerated under the action of van de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/168H01G11/36
CPCH01G11/36C01B32/168C01B2202/22Y02E60/13
Inventor 陈政魏超慧余林颇邓德利夏兰胡笛
Owner THE UNIV OF NOTTINGHAM NINGBO CHINA
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