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Conducting fiber containing nano car bon tube and its prepn. method

A technology of conductive fibers and carbon nanotubes, applied in the direction of conductive/antistatic filament manufacturing, single-component polyester artificial filaments, etc., can solve the problem of large aspect ratio and specific surface area of ​​carbon nanotubes, carbon nanotube active groups There are few clusters and damage to the structure of carbon nanotubes, etc., to achieve good mechanical properties and molding processability, easy blending and spinning processes, and enhanced interaction effects

Active Publication Date: 2005-01-12
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the very few active groups on the surface of carbon nanotubes, its interaction with the polymer matrix is ​​weak
In addition, the aspect ratio and specific surface area of ​​carbon nanotubes are very large, so they are easy to agglomerate and entangle with each other, and it is difficult to disperse uniformly in polymers, so that the excellent performance of carbon nanotubes cannot be reflected in composite materials (A.Allaoui , S. Bai, H.M. Cheng, J.B. Bai, Composites Science and Technology 62(2002))
In addition, since the size of carbon nanotube aggregates is mostly above the micron level, if the aggregates cannot be opened, it is easy to cause the spinneret to be blocked during the spinning process, and it is easy to cause broken ends during drafting, which will reduce the production rate of the product. decline
[0008] At present, methods such as treatment with strong acid (such as aqua regia) are mostly used to improve the dispersion, but this will destroy the structure of the carbon nanotube itself and leave some impurities (J.L.Bahr, J.M.Tour, Chem.Mater.ASAP (2001))
At the same time, the strong acid treatment process will increase the production cost and easily cause environmental pollution, which is not conducive to the large-scale promotion and application of carbon nanotube composite materials.

Method used

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  • Conducting fiber containing nano car bon tube and its prepn. method
  • Conducting fiber containing nano car bon tube and its prepn. method
  • Conducting fiber containing nano car bon tube and its prepn. method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 99.9 parts of polyethylene terephthalate with an average particle diameter of 2 mm after vacuum drying, 0.05 parts of single-walled carbon nanotubes with an outer diameter of 2 to 30 nm and a length of 1 to 50 μm, and 0.05 parts of OP wax , into the high-speed mixer, the mixing temperature is controlled at 80-100 ° C, to make it evenly mixed. The mixture is then added to a twin-screw extruder, the screw speed is controlled at 60 rpm, and the extrusion temperature is controlled at 230-260° C., and the conductive masterbatch is obtained after extruding and pelletizing with a pelletizer. Dry the masterbatch in a vacuum oven, and then use a common spinning machine to make conductive fibers through conventional spinning and drawing processes. The carbon nanotube content of this conductive fiber is 0.05%, and the volume resistivity is 2×10 10Ω·cm.

Embodiment 2

[0036] 68.2 parts of polyethylene terephthalate and 28.8 parts of polytrimethylene terephthalate with an average particle diameter of 2 mm after vacuum drying, multi-walled carbon nanotubes with an outer diameter of 2 to 30 nm and a length of 1 to 50 μm Add 1 part of carbon nanotubes and 2 parts of OP wax into a high-speed mixer, and control the mixing temperature at 80-100°C to make it evenly mixed. The mixture is then added to a twin-screw extruder, the screw speed is controlled at 60 rpm, and the extrusion temperature is controlled at 230-260° C., and the conductive masterbatch is obtained after extruding and pelletizing with a pelletizer. Dry the masterbatch in a vacuum oven, and then use a common spinning machine to make conductive fibers through conventional spinning and drawing processes. The carbon nanotube content of this conductive fiber is 1%, and the volume resistivity is 6×10 6 Ω·cm.

Embodiment 3

[0038] 97 parts of polytrimethylene terephthalate with an average particle diameter of 80 μm after vacuum drying, 1 part each of single-walled carbon nanotubes and multi-walled carbon nanotubes with an outer diameter of 2 to 30 nm and a length of 1 to 100 μm , 1 part of montan wax is added to a high-speed mixer, and the mixing temperature is controlled at 80-100°C to make it evenly mixed. The mixture is then added to a twin-screw extruder, the screw speed is controlled at 40 rpm, and the extrusion temperature is controlled at 230-260° C., and the conductive masterbatch is obtained after extruding and pelletizing with a pelletizer. Dry the masterbatch in a vacuum oven, and then use a common spinning machine to make conductive fibers through conventional spinning and drawing processes. The carbon nanotube content of this conductive fiber is 2%, and the volume resistivity is 4×10 2 Ω·cm.

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Abstract

A conducting fiber containing carbon nm tubes includes the following three components polyester, carbon nm tube and coupler with the weight ration of polyester 80-94.9, carbon nm tube 0.05-10, the coupler 0.05-10. The three components are prepared to conducting fibers via mix, extrusion and fiber spinning having the composite shapes of interlayer, sheath-core and island, characterizing in utilizing the fine conductivity of the carbon nm tubes and extremely length-diameter ratio to prepare conducting fibers, Special coupler is selected to strongthen the interaction of carbon nm tube and the polyerter to open the coacervates of the tube in the blend process by cutting.

Description

technical field [0001] The invention relates to a conductive fiber and a preparation method thereof, in particular to a polymer / carbon nanotube conductive fiber and a preparation method thereof. Background technique [0002] Polymer materials have the advantages of light weight, good comprehensive performance, good molding processability, and low price. Chemical fibers prepared from polymer materials have been widely used in many fields such as national defense, military industry, construction and clothing. [0003] Most chemical fibers have high volume resistance, and are prone to static electricity due to friction and induction during production and use. When wearing ordinary clothes and walking on the insulating ground, the electrostatic potential can reach more than 3000V. Higher electrostatic voltage can cause electric shock to the human body and cause damage to electronic components; electrostatic discharge can cause accidental explosion of gunpowder and chemicals; el...

Claims

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Application Information

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IPC IPC(8): D01F1/09D01F6/62
Inventor 黄毅罗国华魏飞李志飞刘建良李安青
Owner TSINGHUA UNIV
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