Modification method of aramid fiber

A kind of aramid fiber and modification technology, which is applied in the field of high-performance fiber modification to achieve the effect of improving overall mechanical properties, reducing production costs, and improving comprehensive performance

Active Publication Date: 2014-01-01
HYTECH CARBON COMPOSITES (NANJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, there has been no report on the application of cryogenic treatment to the modification of aramid fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Modification of Kevlar-29 Fiber by Cryogenic Treatment

[0027] Place the clean Kevlar-29 fibers in the cryogenic treatment equipment (SLX-100R). Cover the container of the cryogenic treatment equipment tightly to avoid leakage of low-temperature liquid nitrogen, which will affect the accuracy of temperature control and treatment effect, and set the process parameters of cryogenic treatment. Set the cryogenic treatment parameters according to the cryogenic treatment parameter table in Table 1.

[0028] Table 1 Cryogenic treatment parameter table

[0029] Cooling rate (°C / min)

[0030] After the treatment is completed, when the ambient temperature of the container reaches room temperature, the fiber must not be taken out of the container directly by hand, and special equipment must be used. When the cryogenically treated Kevlar-29 fibers to be taken out are naturally returned to room temperature in the air, the modification process is completed. After cryoge...

Embodiment 2

[0032] Modification of Kevlar-129 Fiber by Cryogenic Treatment

[0033] Place the clean Kevlar-129 fiber in the cryogenic treatment equipment (SLX-100R). Cover the container of the cryogenic treatment equipment tightly to avoid leakage of low-temperature liquid nitrogen, which will affect the accuracy of temperature control and treatment effect, and set the process parameters of cryogenic treatment. Set the cryogenic treatment parameters according to the cryogenic treatment parameter table in Table 1.

[0034] Table 2 Cryogenic treatment parameter table

[0035] Cooling rate (°C / min)

[0036] After the treatment is completed, when the ambient temperature of the container reaches room temperature, the fiber must not be taken out of the container directly by hand, and special equipment must be used. When the cryogenically treated Kevlar-129 fibers to be taken out are naturally returned to room temperature in the air, the modification process is completed. After cryo...

Embodiment 3

[0038] Modification of Technora Fiber by Cryogenic Treatment

[0039] Cleaned Technora fibers were placed in a cryogenic processing unit (SLX-100R). Cover the container of the cryogenic treatment equipment tightly to avoid leakage of low-temperature liquid nitrogen, which will affect the accuracy of temperature control and treatment effect, and set the process parameters of cryogenic treatment. Therefore, the cryogenic treatment parameters can be set according to the cryogenic treatment parameter table in Table 1.

[0040] Table 3 Cryogenic treatment parameter table

[0041] Cooling rate (°C / min)

[0042] After the treatment is completed, when the ambient temperature of the container reaches room temperature, the fiber must not be taken out of the container directly by hand, and special equipment must be used. When the cryogenically treated Technora fibers to be taken out are naturally returned to room temperature in the air, the modification process is completed. ...

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PUM

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Abstract

The invention relates to a modification method of an aramid fiber. The method comprises the steps as follows: the aramid fiber is placed in a cryogenic treatment device provided with a cryogenic medium, and a container is closed; cryogenic treatment technological parameters are set as follows: the cooling rate is 0.5-50 DEG C / min, the treatment temperature is minus 90-minus 200 DEG C, and the treatment time is 3-15 h; and after the temperature returns to the room temperature, the aramid fiber is taken out of the cryogenic treatment device, and the treatment is finished. According to the modification method of the aramid fiber, the fiber abrasion resistance is improved, the roughness of the aramid fiber is increased, the bonding performance between the aramid fiber and a resin matrix interface is improved, and the comprehensive performance of the aramid fiber is improved.

Description

technical field [0001] The invention belongs to the field of high-performance fiber modification, and in particular relates to a modification method of aramid fiber. Background technique [0002] Aramid fiber (aramid fiber) is the fastest growing high-performance chemical fiber in the world. It has excellent mechanical and dynamic properties such as high specific strength, high specific modulus, low density, wear resistance, impact resistance, and fatigue resistance; good chemical corrosion resistance, high temperature resistance, low expansion, low electrical conductivity, It has attracted widespread attention due to its outstanding thermal properties such as non-combustibility and non-melting, as well as excellent dielectric properties. As a fiber-reinforced composite material, it has more significant advantages than glass fiber-reinforced composite materials in terms of density and strength, so it is widely used in aerospace, national defense, electronic communications, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/00
Inventor 许福军刘冰邱莹丹邱夷平
Owner HYTECH CARBON COMPOSITES (NANJING) CO LTD
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