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Carbon nanotube conductive masterbatch and preparation method thereof

A conductive masterbatch and carbon nanotube technology, which is applied in the field of carbon nanotube conductive masterbatch and its preparation, can solve problems such as difficulty in large-scale production, potential safety hazards in large-scale production, and difficulty in dispersing carbon nanotubes, achieving low cost , reduce harmful pollution, good compatibility

Active Publication Date: 2020-07-03
JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Extensive use of organic solvents is not only detrimental to environmental protection, but also brings huge safety hazards to large-scale production. At the same time, ultrasonic treatment is difficult to achieve large-scale production
[0007] Traditional carbon nanotube conductive masterbatch preparation methods have defects such as difficult dispersion of carbon nanotubes, flying dust, use of toxic solvents and low production efficiency.

Method used

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  • Carbon nanotube conductive masterbatch and preparation method thereof
  • Carbon nanotube conductive masterbatch and preparation method thereof
  • Carbon nanotube conductive masterbatch and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Mix 10kg3# white oil with 1000g montan wax, heat to 90°C to melt the montan wax, and stir evenly;

[0049] Add 250g of dispersing aid, stir to make the dispersant evenly distributed in the system, then add 500g of multi-walled carbon nanotubes, 3250g of PE powder, and stir with a high-speed stirrer at 2000 rpm for 30 minutes. The dispersant and montan wax are fully infiltrated into the carbon In the nanotube gap, the carbon nanotubes are evenly dispersed;

[0050] After the material is cooled, use pressing to squeeze out excess white oil, and then put it in an oven for drying at 95°C;

[0051]The dried material is put into a twin-screw extruder for blending, extrusion and granulation to obtain a 10% carbon nanotube conductive masterbatch with a particle size of a modified PE matrix of about 4 mm.

Embodiment 2

[0053] Mix 10kg3# white oil with 2000g montan wax, heat to 90°C to melt the montan wax, and stir evenly;

[0054] Add 500g of dispersing aid, stir to make the dispersant evenly distributed in the system, then add 1000g of multi-walled carbon nanotubes, 1500g of PE powder, and stir with a high-speed stirrer at 2000 rpm for 30 minutes. The dispersant and montan wax are fully infiltrated into the carbon In the nanotube gap, the dispersion is uniform;

[0055] After the material is cooled, use pressing to squeeze out excess white oil, and then put it in an oven for drying at 95°C;

[0056] The dried material is put into a twin-screw extruder for blending, extrusion and granulation to obtain a 20% carbon nanotube conductive masterbatch with a particle size of a modified PE matrix of about 4 mm.

Embodiment 3

[0058] Mix 10kg3# white oil with 1000g montan wax, heat to 90°C to melt the montan wax, and stir evenly;

[0059] Add 250g of dispersing aid, stir to make the dispersant evenly distributed in the system, then add 500g of multi-walled carbon nanotubes, 3250g of PP powder, and stir with a high-speed stirrer at 2000 rpm for 30 minutes, the dispersant and montan wax are fully infiltrated into the carbon In the nanotube gap, the dispersion is uniform;

[0060] After the material is cooled, use pressing to squeeze out excess white oil, and then put it in an oven for drying at 95°C;

[0061] The dried material is put into a twin-screw extruder for blending, extrusion and granulation to obtain a 10% carbon nanotube conductive masterbatch with a particle size of the modified PP matrix of about 4 mm.

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Abstract

The invention belongs to the technical field of carbon nanotube application, and relates to a carbon nanotube conductive masterbatch and a preparation method thereof. The conductive masterbatch comprises multi-walled carbon nanotubes, wax, a dispersing aid and a polymer. The specific preparation method comprises the following steps: mixing white oil and the wax, heating to melt the wax, adding themulti-walled carbon nanotubes, the dispersing aid and the polymer, uniformly stirring and dispersing at a high speed, removing the white oil by adopting squeezing and drying processes, extruding, blending, bracing and pelletizing to obtain the conductive masterbatch. The white oil and the wax are relatively good in compatibility in a molten liquid state and good in wettability with the carbon nanotubes, so that the multi-walled carbon nanotubes are effectively dispersed. After squeezing, the dispersed state of the multi-walled carbon nanotubes is reserved, the multi-walled carbon nanotubes enter the polymer melt, the conductive threshold of a prepared masterbatch modified material is low, and the problem that the multi-walled carbon nanotubes are difficult to disperse in high-viscosity polymer melt is solved. The method is simple in process, less dust flies in the processing process, and the white oil can be recycled.

Description

technical field [0001] The invention relates to the technical field of application of carbon nanotubes, and more specifically relates to a conductive masterbatch of carbon nanotubes and a preparation method thereof. Background technique [0002] Carbon nanotubes belong to one-dimensional carbon nanomaterials, that is, the shape of small tubes with a diameter of nanoscale. It has good electrical conductivity, high thermal conductivity, chemical stability and thermal stability. Due to its low density and large aspect ratio, carbon nanotubes become a good conductive filler for polymer composite materials. Polymer materials usually have high resistivity, and long-term use will cause a large amount of static electricity in polymer products, which may damage the product and cause fire and explosion hazards. To solve this problem, adding antistatic masterbatch to polymer materials is a common solution. [0003] Generally, there are roughly two types of conductive masterbatch prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L91/06C08L91/00C08K3/04C08J3/22
CPCC08J3/226C08K2201/011C08K3/041C08K2201/001C08J2423/06C08J2423/12C08J2491/06C08J2491/00
Inventor 王小斌陈名海彭小权孙云龙
Owner JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD