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Continuous carbon nano tube fiber-reinforced PA6 thermoplastic composite material and preparation method thereof

A carbon nanotube fiber and composite material technology, which is applied in the field of continuous carbon nanotube fiber reinforced PA6 thermoplastic composite materials and its preparation, can solve the problem of only tens of degrees, limited improvement in mechanical properties, mechanical properties and thermal deformation resistance. Application and other issues, to achieve the effect of improving flow properties, improving impregnation effect, and excellent mechanical properties

Inactive Publication Date: 2017-07-28
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] PA6 is one of the thermoplastic engineering plastics, its melting point is around 215°C, its strength is much higher than that of general-purpose plastics, its tensile strength can reach more than 60MPa, but its thermal deformation temperature is only tens of degrees under load conditions, its mechanical properties and heat resistance Deformation performance limits its application in high performance demanding fields
At present, many studies mainly use multi-walled or single-walled carbon nanotubes to modify polymers to prepare composite materials, which can endow polymers with many new functions, but the improvement in mechanical properties is very limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A continuous carbon nanotube fiber-reinforced PA6 thermoplastic composite material. The premix includes: 100kg of PA6 resin, 0.1kg of high-efficiency organic copper stabilizer H3377, 0.2kg of hyperbranched resin Hyper CYD-701, and ethylene-octyl ethylene copolymer grafted maleic anhydride POE-g-MAH 1kg, Akema AX8900 2kg;

[0027] Preparation method: After the above components are pre-mixed, they are melted and mixed by a single-screw unit and extruded into a "hanger"-shaped die for splitting, and finally enter the "S"-shaped die to fully impregnate the activated carbon nanotube fibers. After cooling and granulating with cooling water, long fiber reinforced thermoplastic PA6 particles LFRT are produced, with a carbon nanotube fiber content of 20%;

[0028] The temperature of the screw extruder is: 220°C; the temperature of the "hanger" die head is 240°C; the temperature of the "S" die head is 260°C.

Embodiment 2

[0030] A carbon nanotube fiber-reinforced PA6 thermoplastic composite material. The pre-mixture includes: PA6 resin 100kg, high-efficiency organic copper stabilizer H3336 0.5kg, hyperbranched resin CYD-7011kg, ethylene octene copolymer POE 10kg , POE-g-MAH 5kg;

[0031] Preparation method: After the above components are pre-mixed, they are melted and mixed by a single-screw unit and extruded into a "hanger"-shaped die for splitting, and finally enter the "S"-shaped die to fully impregnate the activated carbon nanotube fibers. After cooling and granulating with cooling water, long-fiber-reinforced thermoplastic particles LFRT are produced, and the content of carbon nanotube fibers is controlled at about 30%;

[0032] The temperature of the screw extruder is: 250°C; the temperature of the "hanger" type die is 250°C; the temperature of the "S" type die is 260°C.

Embodiment 3

[0034] A carbon nanotube fiber-reinforced PA6 thermoplastic composite material. The premix formula includes: PA6 resin 100kg, antioxidant 1098 0.1kg, anti-yellowing agent H10 0.2kg, hyperbranched resin C100 0.6kg, DuPont FUSN493D 5kg, ethylene-octene copolymer grafted maleic anhydride POE-g-MAH 3kg;

[0035] Preparation method: After the above components are pre-mixed, they are melted and mixed by a twin-screw unit and extruded into a "hanger"-shaped die for splitting, and finally enter the "S"-shaped die to fully impregnate the carbon nanotube fibers. Cooling water cooling and granulation to produce long-fiber reinforced PA6 thermoplastic particles LFRT, and the content of carbon nanotube fibers is controlled at about 50%;

[0036] The temperature of the screw extruder is: 240°C; the temperature of the "hanger" die head is 250°C; the temperature of the "S" die head is 280°C.

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Abstract

The invention relates to the technology of carbon nano tube fiber, in particular to a continuous carbon nano tube fiber-reinforced PA6 thermoplastic composite material and a preparation method thereof. The preparation method comprises the following steps: firstly mixing 100 parts of PA6 resin, 0.1 to 0.5 part of an antioxygen, 0.2 to 1 part of a flowing accelerant, 1 to 5 parts of a compatibilizer and 2 to 10 parts of a flexibilizer, extruding the mixture into a hanger type die head for shunting through fusion mixing of a double / single screw unit, entering into an S-shaped die head for carrying out sufficient impregnation on active carbon nanot tube fiber, carrying out cooling water cooling pelleting, and finally preparing the continuous carbon nano tube fiber-reinforced PA6 thermoplastic composite material. According to the composite material disclosed by the invention, the mechanical property is greatly promoted, and based on a continuous network structure, the electric conduction and heat conduction performances of the composite material are also greatly improved.

Description

technical field [0001] The invention relates to carbon nanotube fiber technology, in particular to a continuous carbon nanotube fiber reinforced PA6 thermoplastic composite material and a preparation method thereof. Background technique [0002] Since carbon nanotubes (CNTs) were observed in vacuum arc-evaporated graphite electrodes in the 1990s, CNTs have aroused widespread interest from experts in different research fields worldwide because of their unique structures and excellent properties. Carbon nanotubes have good mechanical properties. The tensile strength of CNTs reaches 50-200GPa, which is 100 times that of steel, but the density is only 1 / 6 of steel, which is at least an order of magnitude higher than that of conventional graphite fibers; its elastic modulus can reach 1TPa. , equivalent to the modulus of elasticity of diamond, about 5 times that of steel. Its excellent mechanical properties, electrical properties, high thermal conductivity, good thermal and chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L51/06C08L23/08C08K9/00C08K9/06C08K7/24B29C47/92B29C48/92
CPCC08L77/02B29C2948/92704C08K2201/001C08K2201/003C08K2201/011C08L2201/04C08L2205/035C08L51/06C08L23/0815C08K9/00C08K9/06C08K7/24
Inventor 张师贤张思灯
Owner JIANGXI UNIV OF SCI & TECH
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