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Surface modification method of aramid fiber

A kind of aramid fiber, surface modification technology, applied in the direction of fiber treatment, fiber type, ultrasonic/sonic fiber treatment, etc., can solve the problems of poor bonding strength of aramid fiber surface interface, improve roughness and surface activity, Realize the effect of large-scale industrial production and simple process

Inactive Publication Date: 2019-11-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the above-mentioned technologies, the present disclosure provides a method for surface modification of aramid fiber, which is simpler than the methods in the prior art, and can improve the smoothness and polarity of the surface of aramid fiber. Problems of high and poor interfacial bond strength

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  • Surface modification method of aramid fiber
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  • Surface modification method of aramid fiber

Examples

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Embodiment 1

[0038] This embodiment provides a method for modifying aramid fibers with a silane coupling agent, including three steps: surface ultrasonic cleaning, surface complexation reaction, and silane coupling agent surface grafting reaction. The specific implementation steps are as follows:

[0039] 1. Ultrasonic cleaning of aramid fiber surface:

[0040] (1) Place the aramid fiber in acetone or ethanol solution, and use an ultrasonic cleaner to vibrate and clean at room temperature for 2 hours. After cleaning, take out the fiber and rinse it repeatedly with deionized water for 10 minutes;

[0041] (2) Place the aramid fibers cleaned in step (1) in a drying oven with the temperature controlled at 70°C, vacuum-dry for 4 hours, and then take them out for later use;

[0042] 2. Surface complexation reaction of complexing agent ethanol solution

[0043] (1) Place the cleaned and dried aramid fiber in the reaction kettle, inject the complexing agent CaCl 2Ethanol solution, the mass frac...

Embodiment 2

[0062] This embodiment provides a method for modifying aramid fiber with a silane coupling agent, which includes three steps: ultrasonic cleaning of the surface of the aramid fiber, surface complexation reaction of complexing agent ethanol solution, and surface grafting reaction of silane coupling agent. The implementation steps are as follows:

[0063] 1. Ultrasonic cleaning of aramid fiber surface:

[0064] (1) Place the aramid fiber in acetone or ethanol solution, and use an ultrasonic cleaner to vibrate and clean at room temperature for 1.5 hours. After cleaning, take out the fiber and rinse it repeatedly with deionized water for 5 minutes;

[0065] (2) Place the aramid fibers cleaned in step (1) in a drying oven with the temperature controlled at 60°C, vacuum-dry for 3 hours, and then take them out for use;

[0066] 2. Surface complexation reaction of complexing agent ethanol solution

[0067] (1) Place the cleaned and dried aramid fibers in the reactor, inject complexi...

Embodiment 3

[0075] This embodiment provides a method for modifying aramid fiber with a silane coupling agent, which includes three steps: ultrasonic cleaning of the surface of the aramid fiber, surface complexation reaction of complexing agent ethanol solution, and surface grafting reaction of silane coupling agent. The implementation steps are as follows:

[0076] 1. Ultrasonic cleaning of aramid fiber surface:

[0077] (1) Place the aramid fiber in acetone or ethanol solution, and use an ultrasonic cleaner to vibrate and clean it at room temperature for 2.5 hours. After cleaning, take out the fiber and rinse it repeatedly with deionized water for 15 minutes;

[0078] (2) Place the aramid fibers cleaned in step (1) in a drying oven with the temperature controlled at 80° C., and take them out after vacuum drying for 5 hours;

[0079] 2. Surface complexation reaction of complexing agent ethanol solution

[0080] (1) Place the cleaned and dried aramid fiber in the reaction kettle and inje...

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Abstract

The disclosure belongs to the technical field of modification of aramid fibers and particularly relates to a surface modification method of an aramid fiber and application thereof. The disclosure provides a method of modifying an aramid fiber with a silane coupling agent. The method comprises ultrasonic washing of surface, surface complexation, and surface grafting of the silane coupling agent. The -Cl functional groups are introduced through treatment of complexing agents (such as CaCl2, LiCl and ZnCl2), fiber surface roughness can be improved, complex structure can be formed, and grafting effect of the coupling agent on the fiber surface is improved; active groups are introduced through bridging action of the silane coupling agents (KH550, KH560 and KH570), fiber surface polarity can bereduced, fiber surface can be activated, fiber interfacial performance can be improved, and mechanical properties of an aramid fiber reinforced composite can be improved. The method of the invention is simple and efficient and has low cost; a reaction solvent is reusable; the method of the invention is suitable for large-scale industrial production.

Description

technical field [0001] The disclosure belongs to the modification technology of aramid fibers, and in particular relates to a method for secondary modification of the surface of aramid fibers by a complexing agent combined with a silane coupling agent. Background technique [0002] The information disclosed in this Background section is only intended to increase the understanding of the general background of the disclosure, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes prior art that is already known to those skilled in the art. [0003] High-performance fiber-reinforced resin-based composite materials are becoming more and more popular in the aerospace field, and the amount of advanced composite materials has become one of the advanced symbols of aerospace technology. As a high-quality reinforcing material, aramid fiber has the characteristics of high temperature resistance, high modulus, high strength, lo...

Claims

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Application Information

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IPC IPC(8): D06M11/13D06M11/155D06M13/513D06M10/08D06M10/06D06M10/02D06M101/36
CPCD06M10/02D06M10/06D06M10/08D06M11/13D06M11/155D06M13/513D06M2101/36
Inventor 史振宇张帅王兆辉袭建人杨晓涛王继来
Owner SHANDONG UNIV
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