Surface modified aramid, surface modifying method and application

A surface modification, aramid fiber technology, used in textiles and papermaking, fiber types, ultrasonic/sonic fiber treatment, etc., can solve the problems of low shear strength, easy deactivation of active points on the fiber surface, and high interfacial shear strength. Achieve the effects of high interfacial shear strength, easy industrial processing, and good compatibility

Active Publication Date: 2019-04-26
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, surface modifying 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 12 hours.

[0055] (2) Place the dried continuous aramid fiber evenly 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 generation power is 400w, and the treatment time is 60s, and the aramid fiber after plasma treatment is obtained.

[0056] (3) Pour 1,3-dried hydantoin epoxy resin (epoxy value: 0.75mol / 100g) into the oiling tank, heat to 70°C, and the viscosity is 58mPa.s (Brookfield DV-Ⅲ rotary Viscometer, rotor type SC4-18, the rotating speed is 10 rev / min). The plasma-treated aramid fiber is continuously passed through the oiling tank to obtain the surface-modified aramid fiber. In this embodiment, the surface treatment agent content is 1.6%.

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

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 12 hours.

[0065] (2) Place the dried continuous aramid fiber evenly 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 generation 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-dihydrated hydantoin epoxy resin (epoxy value 0.77mol / 100g) into the oil tank, heat to 70°C, and the viscosity is 65mPa .s (Brookfield DV-Ⅲ rotational viscometer, rotor type SC4-18, rotating speed is 10 rpm). The plasma-treated aramid fiber is continuously passed through the oiling tank to obtain the surface-modified aramid fiber. In this embodiment, the surface treatment agent content is 1.5%.

[0067] Surface treatment agent content, IFSS and ILSS determination method are...

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 12 hours.

[0071] (2) Place the dried continuous aramid fiber evenly 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 generation 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-dihydrated hydantoin epoxy resin (epoxy value 0.70mol / 100g) into the oiling tank, heat to 70°C, and the viscosity is 72mPa .s (Brookfield DV-Ⅲ rotational viscometer, rotor type SC4-18, rotating speed is 10 rpm). The plasma-treated aramid fiber is continuously passed through the oiling tank to obtain the surface-modified aramid fiber. In this embodiment, the surface treatment agent content is 1.8%.

[0073] Surface treatment agent content, IFSS and ILSS determination method ...

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Abstract

The invention relates to surface modified aramid, a surface modifying method and application, and aims at solving the technical problems of low interfacial shear strength of aramid and epoxy resin andeasily inactivated plasma processed aramid surface. The surface modified aramid is prepared from aramid and surfactant, and is characterized in that the surfactant is epoxy resin containing a nitrogen heterocyclic ring structure, and is 0.2-5 percent of the weight of the surface modified aramid. The problem can be well solved by adopting the technical scheme of performing plasma surface treatmentbefore surfactant treatment on aramid. The surface modifying method can be used in industrial production of surface modified aramid.

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 aromatic polyamide fiber. It is one of the three high-performance synthetic fibers recognized in the world. It has been widely used in many fields such as national defense, aerospace, rail transportation, safety protection, environmental protection and electronic information. According to the polymer structure, aramid can be divided into meta-aramid and para-aramid. Among them, meta-aramid is mainly used as high-temperature filter materials, flame-retardant materials and electrical insulation materials in the form of functional fibers, while para-aramid has higher strength and modulus due to its highly symmetrical macromolecular chain structure. , heat resistance and dimensional stability, mainly used as re...

Claims

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Application Information

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Patent Type & Authority Applications(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
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