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Aramid fiber surface modification method

A surface modification, aramid fiber technology, applied in fiber type, textile and papermaking, ultrasonic/sonic fiber treatment, etc., to achieve the best mechanical properties

Inactive Publication Date: 2016-05-11
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a lack of an effective surface modification method for aramid fibers in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Present embodiment provides a kind of aramid fiber surface modification method, it comprises the following steps:

[0029] (1) Use ultrasonic waves to treat the surface of the modified aramid fiber, the ultrasonic power is 50W, the treatment time is 30 minutes, the ultrasonic medium is water, and the temperature of the ultrasonic medium is controlled at about 75°C;

[0030] (2) drying the aramid fibers after step (1);

[0031] (3) Soak the aramid fibers treated in step (2) in hydrogen peroxide solution, the concentration of hydrogen peroxide is 3%, and the soaking time can be 3 minutes;

[0032] (4) Soak the aramid fibers treated in step (3) in the buffer solution that dissolves the compound with the adjacent hydroxyl group, the compound with the adjacent hydroxyl group adopts dopamine, and the buffer solution is TRIS (three Hydroxymethylaminomethane) buffer solution, keep the pH value of the buffer solution at 8, keep the buffer solution in contact with the air and ma...

Embodiment 2

[0038] The present embodiment also provides a method for modifying the surface of aramid fiber, which differs from Example 1 in that: in step (1), the ultrasonic power is 2000W, the treatment time is 1 minute, and the ultrasonic medium is a mixture of water and ethanol. Mixture, the temperature of ultrasonic medium is controlled at about 90 ℃; In step (3), the concentration of hydrogen peroxide is 5%, soaking time can be 7 minutes; In step (4), the compound with o-hydroxyl group adopts o-hydroxybenzene Ethanone, keep the pH value of the buffer solution at 9, keep the buffer solution in contact with the air and maintain normal temperature, the soaking time can be 24 hours; in step (6), the proportioning of ethanol and silane is 8: 1, and the soaking time is 5 hour; in step (7), rinse with acetone.

[0039] When the modified aramid fiber obtained by the method of this embodiment is compounded with rubber, its adhesion strength is increased by more than 600% compared with ordinar...

Embodiment 3

[0041] The present embodiment also provides a method for modifying the surface of aramid fiber, which differs from Example 1 in that: in step (1), the ultrasonic power is 1000W, the treatment time is 15 minutes, and the ultrasonic medium is 70% ethanol solution, the temperature of the ultrasonic medium is controlled between 50~90°C; in step (3), the concentration of hydrogen peroxide is 45%, and the soaking time is 5 minutes; Phenyl hydroxybenzoate, keep the pH value of the buffer solution at 8.5, keep the buffer solution in contact with the air and maintain normal temperature, the soaking time can be 20 hours; in step (6), the proportioning of ethanol and silane is 12: 1, soak The time is 4 hours; in step (7), a mixture of ethanol and acetone is used for rinsing.

[0042] When the modified aramid fiber obtained by the method of this embodiment is compounded with rubber, its adhesion strength is increased by more than 600% compared with ordinary aramid fiber, its tensile stren...

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PUM

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Abstract

The invention relates to the technical field of aramid fiber surface modification, in particular to an aramid fiber surface modification method. The aramid fiber surface modification method comprises the following steps that 1, surface treatment is performed on aramid fibers to be modified through ultrasonic waves; 2, the aramid fibers treated through the step 1 are dried; 3, the aramid fibers treated through the step 2 are placed in a hydrogen peroxide solution to be soaked; 4, the aramid fibers treated through the step 3 are placed in a buffer solution in which a compound with an o-hydroxy group is dissolved to be soaked; 5, the aramid fibers treated through the step 4 are washed and then dried; 6, the aramid fibers treated through the step 5 are placed in a solution prepared from ethyl alcohol and silane to be soaked; 7, the aramid fibers treated through the step 6 are treated through drip washing and then dried. The aramid fibers modified through the method are high in tensile strength and compositing viscosity with rubber.

Description

technical field [0001] The invention relates to the technical field of aramid fiber surface modification, in particular to a method for aramid fiber surface modification. Background technique [0002] The full name of aramid fiber is "poly-p-phenylene terephthalamide", which is Aramidfiber in English (the trade name of Teijin Aramid is Twaron, and the trade name of DuPont is Kevlar). It is a new type of high-tech synthetic fiber with super High strength, high modulus, high temperature resistance, acid and alkali resistance, light weight and other excellent properties, its strength is 5 to 6 times that of steel wire, its modulus is 2 to 3 times that of steel wire or glass fiber, and its toughness is 2 times that of steel wire , and the weight is only about 1 / 5 of the steel wire, and it will not decompose or melt at a temperature of 560 degrees. It has good insulation and anti-aging performance, and has a long life cycle. The discovery of aramid fiber is considered to be a v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/144D06M13/513D06M11/50D06M10/02D06M13/328C08L9/02C08L7/00C08L77/10C08J5/06D06M101/36
CPCD06M13/144C08J5/06C08J2307/00C08J2309/02C08J2477/10C08L7/00C08L9/02C08L2205/16D06M10/02D06M11/50D06M13/328D06M13/513D06M2101/36C08L77/10
Inventor 陈忠仁马少华闫智敬毕文超
Owner NINGBO UNIV
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