A method for electron beam pre-radiation grafting modified aramid fibers

A technique for grafting and modifying aramid fiber, which is applied in fiber treatment, fiber type, textiles and papermaking, etc., which can solve the problems of high equipment requirements, unfavorable industrial production, and complex modification process, and achieve simple preparation process and responsive The effect of easy control and high irradiation efficiency

Active Publication Date: 2019-11-22
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an electron beam pre-radiation grafting modified Methods for Sexual Aramid Fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In an air atmosphere at room temperature, by weight, 100 parts of aramid fibers are irradiated under electron beams, the fiber speed is 4.01m / min, the beam current is 5mA, the voltage is 500kV, and the absorbed dose is 25kGy.

[0032] Add 100 parts of irradiated aramid fibers to a solution consisting of 2500 parts of deionized water and 2500 parts of acrylic acid monomer, and add 2 parts of ferrous ammonium sulfate. After the above system was blown with nitrogen for 20 minutes at room temperature, it was placed in a water bath and heated to 60° C. for 6 hours. After the reaction was completed, the aramid fibers were taken out and cleaned with deionized water and methanol ultrasonically for 3 times, each time for 0.5h, then placed in an oven, dried at 50°C for 8h, and the grafting rate was calculated to be 1.3%. . After XPS characterization, the C content on the fiber surface decreased from 71.7% to 63.8%, the O content increased from 17.5% to 25.4%, and the N content d...

Embodiment 2

[0034] In an air atmosphere at room temperature, by weight, 100 parts of aramid fibers are irradiated under electron beams, the fiber speed is 18.0m / min, the beam current is 80mA, the voltage is 500kV, and the absorbed dose is 320kGy.

[0035] Add 100 parts of irradiated aramid fibers to a solution consisting of 4500 parts of demethanol and 500 parts of acrylamide monomer, and add 2 parts of ferrous ammonium sulfate. After the above system was blown with nitrogen for 30 minutes at room temperature, it was placed in a water bath and heated to 70° C. for 17 hours. After the reaction was completed, the aramid fiber was taken out and cleaned five times with deionized water and methanol ultrasonically, each time for 0.5h, then placed in an oven, dried at 60°C for 8h, and the grafting rate was calculated to be 0.62% by weighing. . After XPS characterization, the C content on the fiber surface decreased from 71.7% to 65.9%, the O content increased from 17.5% to 21.2%, and the N cont...

Embodiment 3

[0037] In an air atmosphere at room temperature, by weight, 100 parts of aramid fibers are irradiated under electron beams, the fiber speed is 15m / min, the beam current is 60mA, the voltage is 200kV, and the absorbed dose is 200kGy.

[0038] Add 100 parts of irradiated aramid fibers to a solution consisting of 2000 parts of deionized water and 3000 parts of acrylic monomer, and add 7 parts of ferrous ammonium sulfate. After the above system was blown with nitrogen for 25 minutes at room temperature, it was placed in a water bath and heated to 50° C. for 14 hours. After the reaction was completed, the aramid fiber was taken out and ultrasonically cleaned with deionized water and methanol for 3 times, each time for 0.5h, then placed in an oven, dried at 60°C for 8h, and the grafting rate was calculated to be 1.27% by weighing. . After XPS characterization, the C content on the fiber surface decreased from 71.7% to 63.1%, the O content increased from 17.5% to 24.4%, and the N co...

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PUM

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Abstract

The invention discloses a method for electron beam pre-irradiation grafting modification of aramid fibers. The method comprises irradiating aramid fibers under an electron beam, feeding inert gas to the irradiated aramid fibers in a solution containing a polar solvent, a vinyl reactive monomer and ammonium ferrous sulfate to remove oxygen and carrying out heating for a reaction to obtain grafted aramid fibers, wherein the radiation absorption dosage is 25 to 320kGy in the radiation process and a mass ratio of the aramid fibers, polar solvent, vinyl reactive monomer to ammonium ferrous sulfateis 1: (20 to 45): (5 to 30): (0.02 to 0.07). The method realizes electron beam pre-irradiation grafting modification of aramid fibers, has reaction degree controllability, easily adjusts a fiber modification degree, has simple processes, is easy and has a wide application range and large industrialization potential.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a method for electron beam pre-radiation grafting and modification of aramid fibers. Background technique [0002] Aramid fiber has the characteristics of light weight, high strength, high modulus, high temperature resistance, acid and alkali resistance, and corrosion by various organic chemical reagents. Its strength is 5 to 6 times that of steel wire, and its modulus is 2 to 3 times that of steel wire. The weight is only about 1 / 5 of steel wire, and it is called the world's three high-performance fibers together with carbon fiber and ultra-high molecular weight polyethylene fiber. Aramid fiber is an important basic raw material in high-end fields such as national defense, military and aerospace, as well as in industrial and civil fields such as transportation construction, human protection and sports materials, and is also the most widely used fiber material among the three hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M14/34D06M13/203D06M13/41D06M101/36
Inventor 许璐吴国忠李晴暖
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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