Easy-to-disperse carbon nanotube master batch as well as preparation method and application thereof

A carbon nanotube and easy-dispersion technology, applied in the field of carbon nanotubes, can solve the problems of destroying the mechanical properties of polyolefins, low carbon nanotube content concentration, harsh processing conditions, etc. Green environmental protection, good compatibility effect

Active Publication Date: 2020-05-19
JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, free radical initiators are introduced into the formula, and the processing formula is complicated, which destroys the mechanical properties of polyolefin, and the content of carbon nanotubes in the obtained composite material is low, less than 10%.
[0007] Traditional carbon nanotube / polyolefin masterbatch preparation methods have defects such as difficult dispersion of carbon nanotubes, use of toxic and harmful solvents, precipitation of lubricants, harsh processing conditions, and low content of carbon nanotubes in masterbatches.

Method used

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  • Easy-to-disperse carbon nanotube master batch as well as preparation method and application thereof
  • Easy-to-disperse carbon nanotube master batch as well as preparation method and application thereof
  • Easy-to-disperse carbon nanotube master batch as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Mix 720g of 3# white oil with 80g of polyether silicone emulsifier, stir gently, then transfer to the emulsification pump for strong emulsification and mixing for 3 minutes. After mixing, it was poured into a 50L container filled with 8000g of deionized water to form a coarse dispersion emulsion. Start the high-speed disperser, maintain the rotating speed at 1500r / min, utilize the high-speed stirring paddle to disperse the emulsion at high speed for 10min, obtain the micro-nano emulsion (such as figure 1 shown). After reaching the predetermined stirring time, stop stirring and add 800g to the emulsion GT300, 10g antioxidant 1010, continue stirring at high speed to disperse for 20 minutes, then stop stirring again (such as figure 2 shown). Add 6400g polyethylene powder into the container and stir at a low speed of 300r / min. After stirring at a low speed for 20 minutes, transfer the material in the container to an oven at 110°C and bake for 8 hours. After the fully...

Embodiment 2

[0057] Mix 720g of 32# white oil with 720g of emulsifier triton, stir slightly, then transfer to emulsification pump for strong emulsification and mixing for 15 minutes. After mixing, it was poured into a 50L container filled with 8000g of deionized water to form a coarse dispersion emulsion. Start the high-speed disperser, maintain the rotating speed at 3000r / min, and use the high-speed stirring paddle to disperse the coarsely dispersed emulsion at high speed for 15 minutes to obtain a micro-nano emulsion. After reaching the predetermined stirring time, stop stirring, add 400g multi-walled carbon nanotubes in the emulsion NC7000, 5g antioxidant 168, continue stirring at high speed to disperse for 15 minutes, then stop stirring again. Add 160g of polyethylene powder into the container and stir at a low speed of 150r / min. After stirring at a low speed for 15 minutes, transfer the material in the container to an oven at 130°C and bake for 10 hours. After the fully dried mate...

Embodiment 3

[0059] Mix 360g of 150# white oil with 40g of polyether silicone emulsifier, stir gently, transfer to emulsification pump for strong emulsification and mixing for 30min. After mixing, it was poured into a 50L container filled with 4000g of deionized water to form a coarsely dispersed emulsion. Start the high-speed disperser, maintain the rotating speed at 500r / min, and use the high-speed stirring paddle to disperse the coarsely dispersed emulsion at high speed for 30 minutes to obtain a micro-nano emulsion. After reaching the predetermined stirring time, stop stirring and add 800g to the emulsion GT300, 4g of antioxidant 1010 and 4g of antioxidant 168 were dispersed under high-speed stirring for 30 minutes, and then the stirring was stopped again. Add 400g of polyethylene powder into the container and stir at a low speed of 300r / min. After stirring at a low speed for 30 minutes, transfer the material in the container to a 90°C oven and bake for 12 hours. After the fully dr...

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Abstract

The invention belongs to the field of carbon nanotubes, and relates to an easy-to-disperse carbon nanotube master batch, and a preparation method and an application thereof. The master batch specifically comprises white oil, an emulsifier, an antioxidant, carbon nanotubes and powdered polyolefin. The process comprises the following steps: carrying out shearing emulsification on the white oil, theemulsifier and the deionized water to prepare white oil emulsion; then adding carbon nanotubes, and carrying out infiltration, shearing and dispersion to obtain a carbon nanotube wetting dispersion; and adding powdered polyolefin, uniformly mixing the components, concentrating and drying the mixture, and carrying out screw melt extrusion granulation to obtain the carbon nanotube master batch. Herein, the white oil emulsion is used as an infiltration carrier, carbon nanotubes are uniformly dispersed in white oil emulsion bundles through high-speed shearing under the auxiliary action of an emulsifier, micelle particles are stabilized under the action of hydrophilic-hydrophobic force, and re-agglomeration of the dispersed carbon nanotubes is avoided; the fully dispersed carbon nanotubes are used to obtain the easily-dispersed carbon nanotube master batch taking polyolefin as a carrier. The master batch is used as a conductive master batch, and has the advantages of low addition amount, easy dispersion, no flying dust and the like.

Description

technical field [0001] The invention belongs to the field of carbon nanotubes, and more specifically relates to an easily dispersible carbon nanotube masterbatch and its preparation method and application. Background technique [0002] Polyolefin has become the largest share of synthetic materials in the world today. Polyolefin resin has excellent performance and low price, and is widely used in various fields of national economy. Polyolefin has excellent insulating properties, such as polyethylene, polypropylene volume resistivity is generally 10^ 17-19 Ω.cm, but its insulation will encounter troubles in many occasions, and even cause great losses. For example, when preparing polyolefin films, clicks are prone to occur. Polyolefin plastic products are easy to absorb dust, which reduces the use value, and static sparks can also cause major accidents such as fires and explosions. How to eliminate and reduce the electrostatic hazard of polyolefin products has become an impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L91/06C08K3/04C08J3/22
CPCC08J3/226C08J2423/06C08J2491/06C08J2323/06C08K3/041C08K2201/011
Inventor 彭小权陈名海王小斌孙云龙
Owner JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
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