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Modifying method for irradiation grafting of surface of aramid fiber with nano polymer particles

A nano-polymer and aramid fiber technology, which is applied in fiber treatment, dry-cleaning fiber products, textiles and papermaking, etc., can solve the problems of low chemical activity and weak interaction force, increase the specific surface area, promote cross-linking, improve Effect of skin-core structure

Inactive Publication Date: 2016-12-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to solve the problems of smooth surface of aramid fiber, low chemical activity, and weak interaction force between fiber and resin matrix, the invention provides a method for modifying the surface of aramid fiber by irradiation grafting nanometer polymer particles

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  • Modifying method for irradiation grafting of surface of aramid fiber with nano polymer particles
  • Modifying method for irradiation grafting of surface of aramid fiber with nano polymer particles
  • Modifying method for irradiation grafting of surface of aramid fiber with nano polymer particles

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specific Embodiment approach 1

[0034] Specific Embodiment 1: This embodiment provides a method for modifying the surface of aramid fibers by irradiation grafting nano-polymer particles, including two steps of fiber surface cleaning and drying, fiber and acrylonitrile monomer co-irradiation grafting treatment , the specific implementation steps are as follows:

[0035] 1. Aramid fiber surface cleaning and drying:

[0036] (1) Put the aramid fiber bundle into the high-pressure reactor, seal it, and after vacuuming, inject acetone into it through the feed port to make the fiber submerged in the acetone, close the feed port, put the reactor into the oven, and control the temperature React at 60~80°C for 22~26 hours. After the reaction, take out the fiber and wash it with acetone for 5~10 minutes;

[0037] (2) Take out the aramid fibers treated in step (1) and dry them in an oven at 70-80°C for 2-4 hours;

[0038] 2. Co-irradiation grafting treatment of fiber and acrylonitrile monomer:

[0039] (1) Put the dr...

specific Embodiment approach 2

[0054] Specific embodiment 2: This embodiment provides a method for modifying the surface of aramid fibers by irradiation grafting nano-polymer particles, including two steps of fiber surface cleaning and drying, fiber and acrylonitrile monomer co-irradiation grafting treatment , the specific implementation steps are as follows:

[0055] 1. Aramid fiber surface cleaning and drying:

[0056] (1) Put the aramid fiber bundle into the high-pressure reactor, seal it, and after vacuuming, inject acetone into it through the feed port to make the fiber submerged in the acetone, close the feed port, put the reactor into the oven, and control the temperature React at 70°C for 24 hours. After the reaction, take out the fiber and wash it with acetone for 5 minutes;

[0057] (2) Take out the aramid fibers treated in step (1) and dry them in an oven at 75°C for 3 hours;

[0058] 2. Co-irradiation grafting treatment of fiber and acrylonitrile monomer:

[0059] (1) Put the dried aramid fib...

specific Embodiment approach 3

[0064] Specific Embodiment Three: This embodiment provides a method for modifying the surface of aramid fibers by irradiation grafting nano-polymer particles, including two steps of fiber surface cleaning and drying, and co-irradiation grafting of fibers and acrylonitrile monomers , the specific implementation steps are as follows:

[0065] 1. Aramid fiber surface cleaning and drying:

[0066] (1) Put the aramid fiber bundle into the high-pressure reactor, seal it, and after vacuuming, inject acetone into it through the feed port to make the fiber submerged in the acetone, close the feed port, put the reactor into the oven, and control the temperature React at 80°C for 24 hours. After the reaction, take out the fiber and rinse it with acetone for 10 minutes;

[0067] (2) Take out the aramid fibers treated in step (1) and dry them in an oven at 70°C for 4 hours;

[0068] 2. Co-irradiation grafting treatment of fiber and acrylonitrile monomer:

[0069] (1) Put the dried arami...

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Abstract

The invention discloses a modifying method for irradiation grafting of the surface of an aramid fiber with nano polymer particles, wherein the method comprises two steps of cleaning and drying of the surface of the fiber and co-irradiation grafting treatment of the fiber and an acrylonitrile monomer. The aramid fiber and the acrylonitrile monomer are subjected to co-irradiation treatment by gamma rays, a free radical polymerization reaction is triggered on the surface of the fiber through irradiation, and polyacrylonitrile macromolecules are grafted on the surface of the fiber. Under the action of irradiation, ionizing radiation performs interaction with fiber molecules to generate energy transfer, after the fiber molecules absorb energy, ion pairs are generated and molecules are excited, and the fiber molecules can undergo the process of formation of free radicals in the process. The formed free radicals capture the free acrylonitrile monomer and the free radical polymerization reaction is generated, so that the polyacrylonitrile macromolecules are grafted on the surface of the fiber. The method has the advantages of simple process, high efficiency, mild reaction conditions and controllable fiber treatment capacity.

Description

technical field [0001] The invention relates to a method for modifying an aramid fiber, in particular to a method for modifying the surface of an aramid fiber by irradiation and grafting. Background technique [0002] High-performance resin-based composite materials have the advantages of high specific strength, large specific modulus, high temperature resistance, and corrosion resistance. As important national defense strategic materials, they are widely used in many defense industries such as aerospace and weaponry. Among them, aramid fiber is widely used as a high-performance reinforcing material for aerospace due to its low density, high strength, high modulus, high specific hardness, corrosion resistance, wear resistance, good thermal stability, and low electrical conductivity. Various aircraft in China, strategic intercontinental missiles in national defense industry. However, the molecular chains in the structural unit of the aramid fiber are rigid and straight, and ...

Claims

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Application Information

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IPC IPC(8): D06M14/34D06M14/26D06L1/02C08L77/10C08L51/08
CPCD06M14/34C08L51/08C08L77/10C08L2205/16D06L1/02D06M14/26
Inventor 刘丽谢非黄玉东贾储源钟正祥王巍赵敏王彩凤
Owner HARBIN INST OF TECH