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Surface modification method of aramid fiber and application of product thereof

A technology for surface modification and aramid fibers, applied in fiber treatment, light/infrared/X-ray fiber treatment, textiles and papermaking, etc., can solve the problem of increasing the surface roughness and surface activity of aramid fibers, and weak mechanical chelation and other issues, to achieve the effect of suitability for industrialized production, increase of surface area and low energy consumption

Inactive Publication Date: 2017-11-03
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

UV radiation modification technology can increase the surface roughness and surface activity of aramid fiber, and provide conditions for secondary grafting, but because it is a physical modification, the mechanical chelation between the modified fiber and natural rubber is weak

Method used

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  • Surface modification method of aramid fiber and application of product thereof
  • Surface modification method of aramid fiber and application of product thereof

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Effect test

Embodiment 1

[0011] Embodiment 1 of the present invention: a method for surface modification of aramid fibers, placing aramid fiber bundles in a beaker, soaking them in acetone, cleaning them in an ultrasonic cleaner for 4 hours, removing impurities attached to the surface, and then heating them at 80°C After drying, the aramid fiber is cut into short fibers with a length of 6 mm, and sealed for later use.

[0012] Add 3phr aramid fiber into 150phr carbon black / natural rubber compound to prepare aramid fiber / carbon black / natural rubber composite.

Embodiment 2

[0013] Embodiment 2 of the present invention: a method for surface modification of aramid fibers, placing aramid fiber bundles in a beaker, soaking them in acetone, cleaning them in an ultrasonic cleaner for 4 hours, removing impurities attached to the surface, and then heating them at 80°C drying.

[0014] Lay the dried aramid fiber into a layer, and use a UV lamp with a wavelength of 264nm and a power of 1000W to irradiate at a distance of 30cm from the aramid fiber. Under normal temperature and pressure conditions, the radiation time is 8 minutes. Then the aramid fiber is cut into short fibers with a length of 6 mm, and sealed for later use.

[0015] The aramid fiber / carbon black / natural rubber composite material was prepared by adding 3phr UV-etched aramid fiber into 150phr carbon black / natural rubber compound.

Embodiment 3

[0016] Embodiment 3 of the present invention: the surface modification method of aramid fiber, place the aramid fiber bundle in a beaker, soak it with acetone, put it in an ultrasonic cleaner for cleaning for 4 hours, remove the impurities attached to its surface, and then heat it at 80°C drying.

[0017] Lay the dried aramid fiber into a layer, and use a UV lamp with a wavelength of 264nm and a power of 1000W to irradiate at a distance of 30cm from the aramid fiber. Under normal temperature and pressure conditions, the radiation time is 8 minutes. Then the aramid fiber is cut into short fibers with a length of 6 mm, and sealed for later use.

[0018] Prepare 6wt% KH570 ethanol solution at room temperature, seal the mouth of the beaker tightly with plastic wrap, put it into an ultrasonic cleaner and vibrate for 5-20min to make it fully dispersed. Then put the aramid fibers modified by ultraviolet etching into the dispersed KH570 ethanol solution. The mouth of the beaker was ...

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Abstract

The invention discloses a surface modification method of aramid fiber and a preparation method of a product thereof. According to the surface modification method, irradiation modification is performed on the aramid fiber in the air by taking ultraviolet light as an irradiation source, and a silane coupling agent KH570 is grafted twice. The surface roughness of the aramid fiber is increased since the surface of the aramid fiber is etched by ultraviolet modification, thereby increasing the surface area of the fiber, enhancing the mechanical bite between the aramid fiber and natural rubber, and increasing the interfacial bonding strength between the aramid fiber and the natural rubber. The irradiation modification can also excite the activity of surface functional groups of the aramid fiber, the active functional groups can be reacted with the silane coupling agent KH570, and the other end of the KH570 contains double bonds which can participate in the vulcanization reaction of the natural rubber, thereby increasing the interfacial adhesion. The surface modification method has the advantages of safety, high efficiency, low pollution, low energy consumption, simple equipment and suitability for industrialized production, and has a good development prospect in the modification of the aramid fiber.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a method for modifying the surface of aramid fiber. Background technique [0002] Aramid fiber (AF) has high tensile strength, high tensile modulus, good fatigue resistance, chemical corrosion resistance and dimensional stability, high heat resistance, low expansion, low thermal conductivity, non-combustible, insoluble and other excellent properties It is an ideal reinforcement material for rubber composites. However, due to the steric hindrance effect of the benzene ring of the aramid fiber and the high crystallinity of the molecular chain, the surface is very smooth and chemically inert. It is difficult for the amide groups on the surface to interact with other groups, resulting in the inability to interact well with the rubber matrix. Bonding seriously affects the performance of its excellent mechanical properties. Therefore, surface activation treatment must be carried out ...

Claims

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Application Information

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IPC IPC(8): D06M10/00D06M13/513C08L7/00C08L77/10C08K3/04C08J5/06D06M101/36
CPCD06M10/001C08J5/06C08J2307/00C08J2477/10C08L7/00C08L2205/16D06M13/5135D06M2101/36C08L77/10C08K3/04
Inventor 熊玉竹王倩戴骏
Owner GUIZHOU UNIV
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