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A modified aligned carbon nanotube bundle and its preparation method

A technology for the modification of oriented carbon nanotubes, applied in textiles, papermaking, fiber treatment, etc., can solve the problems of complex process, easy damage of tube wall, easy generation of defects in carbon tube structure, etc., and achieve simple coating technology , Improve the interface effect and protect the effect of the orientation structure

Active Publication Date: 2015-10-28
优标易站(苏州)电子商务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many technologies related to the modification of carbon nanotubes, such as acidification, plasma-induced grafting, electrostatic adsorption and other methods to modify carbon nanotubes. Acidification and plasma treatment of carbon tubes can introduce hydroxyl, carbonyl , carboxyl, amino, etc. The introduction of these polar groups can improve the compatibility and interfacial force between carbon tubes and polymers, but the structure of carbon tubes is prone to defects, and the length of carbon tubes and the tube wall of carbon tubes are prone to damage. until broken
The electrostatic adsorption method is currently mostly used for the modification of carbon nanotubes by metal ions or inorganic particles, which cannot effectively solve the compatibility and interfacial force between carbon tubes and polymers.
There are also related reports on polymer coating modification technology, such as polyvinylpyrrolidone and styrene coating modified carbon tubes, but this type of modification process is relatively complicated. Before polymer modification of C tubes, generally acidify C tubes After the introduction of polar groups, polymers are used to modify the acidified carbon tubes, and the polar groups carried on the coating are very small, and the interface modification between carbon tubes and polymer matrix is ​​not used.
So far, research on coating modification technology of aligned carbon nanotube bundles is rare

Method used

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  • A modified aligned carbon nanotube bundle and its preparation method
  • A modified aligned carbon nanotube bundle and its preparation method
  • A modified aligned carbon nanotube bundle and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In a container equipped with a stirrer, weigh 5g of urea and 10g of formaldehyde solution (mass concentration 37-40%). After the urea is fully dissolved, heat slowly and use lye to adjust the pH value of the solution to 8-9. Insulate at 50-70°C for 0.5-1h to obtain a urea-formaldehyde prepolymer solution, then add 50g of deionized water and 1g of aligned carbon nanotube bundles, after ultrasonic dispersion and mechanical stirring, set a certain stirring speed (500rpm), use acid The pH value of the solution is adjusted to 2-4, and the temperature is raised slowly. When the temperature rises to 45-50° C., the temperature is kept for 3-4 hours, and the reaction is terminated. The product is washed several times with water, filtered and dried to obtain a polyurea-formaldehyde polymer-coated aligned carbon nanotube bundle product. See attached figure 1 , which is an SEM image of aligned carbon nanotube bundles; see attached figure 2 , which is the SEM photo of the polyure...

Embodiment 2

[0021] In a container equipped with a stirrer, weigh 30g of urea and 60g of formaldehyde solution (mass concentration 37-40%). After the urea is fully dissolved, heat slowly and adjust the pH value of the solution to 8-9 with lye. Keep warm at 50-70°C for 0.5-1h to obtain urea-formaldehyde prepolymer solution, then add 30g sodium lauryl sulfate, 3000g deionized water and 50g aligned carbon nanotube bundles, after ultrasonic dispersion and mechanical stirring, set a certain Stirring speed (10000rpm), adjust the pH value of the solution to 2-4 with acid solution, slowly raise the temperature, wait for the temperature to rise to 45-50°C, keep it warm for 3-4h, and end the reaction. The product is washed several times with water, filtered and dried to obtain polyurea-formaldehyde polymer-coated carbon tube bundle product. See attached image 3 , is the SEM photo of the polyurea-formaldehyde polymer-coated aligned carbon nanotube bundle provided in this example. Compared figure ...

Embodiment 3

[0023] In a container equipped with a stirrer, weigh 10g of melamine and 20g of formaldehyde solution (mass concentration 37-40%). After the melamine is fully dissolved, heat slowly and use lye to adjust the pH value of the solution to 8-9. Incubate at 50-70°C for 0.5-1h to obtain a melamine-formaldehyde prepolymer solution, then add 0.5g sodium dodecylsulfonate, 500g deionized water and 10g aligned carbon nanotube bundles, ultrasonically disperse and mechanically stir, Set a certain stirring speed (900rpm), adjust the pH value of the solution to 2-4 with acid solution, slowly raise the temperature, wait until the temperature rises to 45-50°C, keep it warm for 3-4h, and end the reaction. The product is washed several times with water, filtered and dried to obtain a melamine-formaldehyde polymer-coated aligned carbon nanotube bundle product. See attached Figure 4 , is the SEM photo of the melamine-formaldehyde polymer-coated aligned carbon nanotube bundle provided in this exa...

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Abstract

The invention discloses a modified oriented carbon nanometer carbon tube bundle and a preparation method thereof, and particularly relates to an amino resin polymer coated and modified oriented carbon nanometer carbon tube bundle and a preparation method thereof. The amino resin polymer coated oriented carbon nanometer carbon tube bundle is mainly prepared from an oriented carbon nanometer tube bundle, an amino compound and formaldehyde through a simple process. The preparation method provided by the invention is simple in preparation process; and the prepared amino resin polymer coated oriented carbon nanometer carbon tube bundle is capable of improving the interfacial compatibility of a carbon tube and a polymer and the dispersibility of the carbon tube in the polymer, and protecting an orientation structure of the carbon tube in the carbon tube bundle.

Description

technical field [0001] The invention relates to a modified oriented carbon nanotube bundle and a preparation method thereof, in particular to an amino resin polymer-coated modified oriented carbon nanotube bundle and a preparation method thereof. Background technique [0002] Carbon nanotubes have excellent mechanical and electrical properties, and have the advantages of low density and large specific surface. They have obvious functions of strengthening, toughening, conducting and flame retardant to polymer composite materials. With the growing maturity of the preparation technology of aligned carbon nanotubes, aligned carbon nanotube bundles show great application potential in polymers. In the field of polymer composite materials, the aligned carbon nanotube bundles are combined with polymers, and the new composite materials show good chemical and physical properties, and show good anisotropic electrical properties. Therefore, aligned carbon nanotube bundles provide an im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/423C08G12/12C08G12/32
Inventor 袁莉顾嫒娟梁国正
Owner 优标易站(苏州)电子商务有限公司
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