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Surface modified aramid fiber, surface modification method and application

A surface modification and aramid fiber technology, applied in the field of surface modified aramid fiber and its surface modification, can solve the problems of easy deactivation of fiber surface active points, low shear strength, high interface shear strength, and easy industrialization. Effects of handling, high interfacial shear strength, and good compatibility

Active Publication Date: 2022-05-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that in the prior art, after plasma treatment of aramid fiber, the surface active points of the fiber are easily deactivated, resulting in low interfacial shear strength (Interfacial Shear Stress, IFSS) of aramid fiber and epoxy resin matrix. The problem is to provide a surface modified aramid fiber, which solves the above problems through the technical solution of surface coating with nitrogen-containing heterocyclic epoxy resin after plasma treatment on the surface of the aramid fiber, and has surface modified aramid fiber and epoxy The advantage of high resin matrix interfacial shear strength (IFSS)
[0006] Two of the technical problem to be solved by the present invention is that in the prior art corresponding to one of the technical problems, the fiber surface active points are easily deactivated after the plasma treatment of the aramid fiber, resulting in the interface shear strength (IFSS) of the aramid fiber and the epoxy resin matrix. ) low technical problem, provide a surface modification method of aramid fiber, through the composite modification process of "plasma treatment + epoxy resin surface treatment agent with nitrogen-containing heterocyclic structure" to solve the above problems, with the obtained surface modification Advantages of high interfacial shear strength (IFSS) between permanent aramid fiber and epoxy resin matrix

Method used

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  • Surface modified aramid fiber, surface modification method and application
  • Surface modified aramid fiber, surface modification method and application
  • Surface modified aramid fiber, surface modification method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Surface modification of aramid fibers:

[0054] (1) Put the continuous aramid fiber in a blast oven and dry it at 80°C for 12h.

[0055] (2) The dried continuous aramid fiber is evenly placed between the positive and negative electrodes of the vacuum plasma processor, the processing medium is air, and the gas flow rate is 50cm 3 / min, the plasma generating power is 400w, and the treatment time is 60s, and the aramid fiber after plasma treatment is obtained.

[0056] (3) Pour 1,3-di-shrunk dry oil hydantoin epoxy resin (epoxy value is 0.75mol / 100g) into the oiling tank, heat it to 70℃, the viscosity is 58mPa.s (Brookfield DV-Ⅲ type rotary Viscometer, rotor type SC4-18, 10 rpm). The aramid fiber after plasma treatment is continuously passed through the oiling tank to obtain the aramid fiber after surface modification. In this example, the content of the surface treatment agent is 1.6%.

[0057] The interfacial shear strength (IFSS) of surface-modified aramid fiber and...

Embodiment 2

[0063] Surface modification of aramid fibers:

[0064] (1) Put the continuous aramid fiber in a blast oven and dry it at 80°C for 12h.

[0065] (2) The dried continuous aramid fiber is evenly placed between the positive and negative electrodes of the vacuum plasma processor, the processing medium is air, and the gas flow rate is 50cm 3 / min, the plasma generating power is 400w, and the treatment time is 60s, and the aramid fiber after plasma treatment is obtained.

[0066] (3) Pour 5,5-methylphenyl-1,3-dicondensed dry oil hydantoin epoxy resin (epoxy value is 0.77mol / 100g) into the oiling tank, heat it to 70℃, the viscosity is 65mPa .s (Brookfield DV-Ⅲ type rotational viscometer, rotor type SC4-18, rotating speed is 10 rpm). The aramid fiber after plasma treatment is continuously passed through the oiling tank to obtain the aramid fiber after surface modification. In this embodiment, the content of the surface treatment agent is 1.5%.

[0067] The surface treatment agent c...

Embodiment 3

[0069] Surface modification of aramid fibers:

[0070] (1) Put the continuous aramid fiber in a blast oven and dry it at 80°C for 12h.

[0071] (2) The dried continuous aramid fiber is evenly placed between the positive and negative electrodes of the vacuum plasma processor, the processing medium is air, and the gas flow rate is 50cm 3 / min, the plasma generating power is 400w, and the treatment time is 60s, and the aramid fiber after plasma treatment is obtained.

[0072] (3) Pour 5,5-methylphenyl-1,3-dicondensed dry oil hydantoin epoxy resin (epoxy value is 0.70mol / 100g) into the oiling tank, heat it to 70℃, the viscosity is 72mPa .s (Brookfield DV-Ⅲ type rotational viscometer, rotor type SC4-18, rotating speed is 10 rpm). The aramid fiber after plasma treatment is continuously passed through the oiling tank to obtain the aramid fiber after surface modification. In this example, the content of the surface treatment agent is 1.8%.

[0073] The surface treatment agent cont...

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Abstract

The invention relates to a surface-modified aramid fiber and a surface modification method and application, which mainly solve the technical problems of low shear strength at the interface between the aramid fiber and epoxy resin and easy deactivation of the surface of the aramid fiber after plasma treatment. The present invention adopts a surface-modified aramid fiber, including aramid fiber and a surface treatment agent, characterized in that the surface treatment agent is an epoxy resin with a nitrogen-containing heterocyclic structure, and the surface treatment agent is modified on the surface of the aramid fiber The content is 0.2wt%~5wt%; Among them, the technical scheme that the aramid fiber is subjected to plasma surface treatment before the surface treatment agent treatment, solves this problem well, and can be used in the industrial production of surface modified aramid fiber middle.

Description

technical field [0001] The invention belongs to the field of fiber surface modification, and in particular relates to a surface-modified aramid fiber and a surface modification method and application thereof. Background technique [0002] The full name of aramid fiber is aramid fiber, which is one of the three high-performance synthetic fibers recognized in the world. Aramid can be divided into meta-aramid and para-aramid according to the polymer structure. Among them, meta-aramid fiber is mainly used as high-temperature filter material, flame retardant material and electrical insulating material in the form of functional fiber, while para-aramid fiber has higher strength and modulus due to the high symmetry of the macromolecular chain structure. , heat resistance and dimensional stability, mainly used as reinforcement materials, such as fiber optic cable reinforcement, tire cords, high-end protective materials, composite materials, etc. [0003] One of the main problems o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M10/02D06M15/55D06M101/36
CPCD06M10/025D06M15/55D06M2101/36
Inventor 张藕生王洪学余荣禄姚斌王芳
Owner CHINA PETROLEUM & CHEM CORP