Modified aramid fiber reinforced PA66 material and preparation method thereof

A modified aramid fiber, fiber reinforced technology, applied in the direction of wear-resistant fiber, fiber type, fiber treatment, etc., can solve the problems of unable to increase the strength of the fiber body, expensive radiation technology equipment, unfavorable industrial production, etc., and achieve good mechanical properties. performance and wear resistance, the effect of increasing body strength, increasing surface roughness

Inactive Publication Date: 2014-04-09
HEILONGJIANG XINDA ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical modification includes ray radiation technology and plasma technology. The equipment of ray radiation technology is expensive, and often requires the introduction of certain solvents and monomers, which is not conducive to large-scale industrial production
Plasma technology only increases the roughness of the fiber surface and the number of active groups, and pure plasma treatment cannot increase the bulk strength of the fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First, place the aramid fiber at the center of the microwave radiation device, the radiation frequency is 0.5GHz, and the radiation dose is 0.1mW / cm 2 , the radiation time is 1S; then, place the aramid fiber modified by microwave radiation in the central area of ​​the low-temperature plasma device, turn on the vacuum pump to extract the air in the cavity, and inject 5% hydrogen, 5% fluorine and 90% A mixed gas of helium, the gas pressure is 10Pa, the processing power is 400W, the processing temperature is 0°C, and the processing time is 20min to obtain the modified aramid fiber.

[0022] PA66, maleic anhydride grafted polyethylene, polytetrafluoroethylene and antioxidant were vacuum dried at 80°C for 6h. The mass percentage of each raw material is PA66 70%, polytetrafluoroethylene 5%, maleic anhydride grafted polyethylene 5%, antioxidant 0.3%, add it into a high-speed mixer and mix for 10 minutes. The mixed material is added to a twin-screw extruder for melt extrusion,...

Embodiment 2

[0025] First, place the aramid fiber at the center of the microwave radiation device, the radiation frequency is 2.5GHz, and the radiation dose is 0.5mW / cm 2 , the radiation time is 60s; then, place the aramid fiber modified by microwave radiation in the central area of ​​the low-temperature plasma device, turn on the vacuum pump to extract the air in the cavity, and inject 10% hydrogen, 10% fluorine and 80% Mixed gas of helium, gas pressure 10 3 Pa, the treatment power is 300W, the treatment temperature is 23° C., and the treatment time is 15 minutes to obtain modified aramid fibers.

[0026] PA66, maleic anhydride grafted polyethylene, polytetrafluoroethylene and antioxidant were vacuum dried at 80°C for 6h. The mass percentage of each raw material is PA66 70%, polytetrafluoroethylene 5%, maleic anhydride grafted polyethylene 5%, antioxidant 0.5%, add to a high-speed mixer and mix for 10 minutes. The mixed material is added to a twin-screw extruder for melt extrusion, and ...

Embodiment 3

[0028] First, place the aramid fiber at the center of the microwave radiation device, the radiation frequency is 3.5GHz, and the radiation dose is 1.5mW / cm 2 , the radiation time is 120S; then, the aramid fiber modified by microwave radiation is placed in the central area of ​​the low-temperature plasma device, the vacuum pump is turned on to extract the air in the cavity, and 12% hydrogen, 12% fluorine and 76% Mixed gas of helium, gas pressure 10 5 Pa, the treatment power is 100W, the treatment temperature is 120° C., and the treatment time is 5 minutes to obtain modified aramid fibers.

[0029] PA66, maleic anhydride grafted polyethylene, polytetrafluoroethylene and antioxidant were vacuum dried at 80°C for 6h. The mass percentage of each raw material is PA66 70%, polytetrafluoroethylene 5%, maleic anhydride grafted polyethylene 5%, antioxidant 0.5%, add to a high-speed mixer and mix for 10 minutes. The mixed material is added to a twin-screw extruder for melt extrusion, a...

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PUM

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Abstract

The invention relate to a modified aramid fiber reinforced PA66 material and a preparation method thereof. The preparation method comprises the steps of modifying the aramid fibers by using microwave radiation, with radiation frequency being 0.5-5 GHZ, radiation dosage being 0.1-2 mW/cm<2> and radiation time being 1-240 s; and then processing the modified aramid fibers by using low temperature plasma, with a processing power being 10-400 W, a processing atmosphere being composed of 5-15% of hydrogen, 5-15% of fluorine and 70-90% of helium, a processing temperature being 0-150 DEG C and a processing time being 1-20 min. The surface layer and the core layer of the aramid fibers modified by the microwave radiation are crosslinked, so that transverse tensile strength of the fibers is increased; and after the low temperature plasma modification, the surfaces of the aramid fibers become rough and are rich in active free radicals and functional groups. The mechanical and wear resistant performances of the composite material prepared by blending and extruding the modified aramid fibers together with the PA66 resin through a double-screw extruder are increased by 15-20% than that of similar products at abroad, and can meet the requirements of the fields such as high speed railways and aerospace for high-performance wear-resistant components.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a modified aramid fiber reinforced PA66 material and a preparation method thereof. Background technique [0002] The full name of aramid fiber is aromatic polyamide fiber, which has the advantages of high specific strength, high specific modulus, low density, high temperature resistance, high toughness and high wear resistance. Due to its excellent performance, it has been widely used in aerospace, military equipment, construction, transportation, communication cables and other fields. [0003] The full name of PA66 is polyhexamethylene adipate, which is one of the most widely used materials in engineering plastics. Both PA66 and aramid fiber belong to the polyamide category. From the analysis of the molecular structure of the two, aramid fiber and PA66 should have good compatibility. However, the surface of aramid fibers is smooth and lacks active groups, resulting in weak int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L77/10C08L51/06C08L27/18C08J5/06D06M10/00D06M10/06B29B9/06B29C47/92B29C48/92
CPCB29B9/06B29C48/92B29C2948/9258B29C2948/92704C08L77/06C08L2205/035C08L2205/16D06M10/003D06M10/06D06M2101/36D06M2200/35C08L77/10C08L51/06C08L27/18B29B7/46B29B7/72B29B7/7461B29B7/90B29B9/12B29B9/14B29C48/40B29C48/875B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 穆兴文宋阳宫克难
Owner HEILONGJIANG XINDA ENTERPRISE GRP
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