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Surface modified aramid fiber, surface modification method thereof and static sealing material

A technology of surface modification and aramid fiber, which is applied in the field of aramid fiber, can solve the problems affecting the performance of composite materials and the production cannot run normally, and achieve the effect of enhancing the effect, preventing precipitation, and improving the mechanical properties

Active Publication Date: 2013-07-10
廊坊佰昂密封材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the fibers prepared by this method are applied to the actual production of composite materials, the polyacrylamide polymer will be deposited on the surface of the drying roller of the equipment, and accumulate more and more, which will eventually affect the performance of the composite material, and in severe cases will lead to Production is not working properly

Method used

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  • Surface modified aramid fiber, surface modification method thereof and static sealing material
  • Surface modified aramid fiber, surface modification method thereof and static sealing material
  • Surface modified aramid fiber, surface modification method thereof and static sealing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] The silane coupling agent represented by formula (I) is dissolved in ethanol to obtain a silane coupling agent solution, wherein n is 2, R 1 , R 2 and R 3 Both are methyl groups; the mass concentration of the silane coupling agent is 1%.

[0077] The silane coupling agent solution is placed in the oiling machine, and under the conveyance of the constant pressure pump, the aramid fibers traveling on the production line are immersed online, and the travel speed of the aramid fibers is 3m / min, so that the silane coupling agent solution Evenly coated on the surface of aramid fiber.

[0078] The aramid fibers coated with the silane coupling agent solution were dried using a steam-heated drum dryer at a temperature of 60° C. and a drying time of 5 minutes under the condition of contacting air to obtain surface-modified aramid fibers.

[0079] Dry the fluororubber at 60°C for 24 hours.

[0080] 30wt% of dried fluorine rubber, 26wt% of surface-modified aramid fiber, 36wt% o...

Embodiment 2

[0092] The silane coupling agent represented by formula (I) (purchased from China Petroleum Corporation, Si69) was dissolved in n-propanol to obtain a silane coupling agent solution, wherein n was 4, R 1 , R 2 and R 3 are ethyl; the mass concentration of the silane coupling agent is 10%.

[0093] The silane coupling agent solution is placed in the oiling machine, and under the conveyance of the constant pressure pump, the aramid fibers traveling on the production line are immersed online, and the travel speed of the aramid fibers is 15m / min, so that the silane coupling agent solution Evenly coated on the surface of aramid fiber.

[0094] The aramid fibers coated with the silane coupling agent solution were dried using a steam-heated drum dryer under the condition of contacting air, the drying temperature was 100°C, and the drying time was 7 minutes to obtain surface-modified aramid fibers.

[0095] Dry the nitrile rubber at 50°C for 30 hours.

[0096] With 30wt% dried nitr...

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Abstract

The invention provides a surface modified aramid fiber and a surface modification method of the surface modified aramid fiber. The surface modification method comprises the steps of coating silane coupling agent solution or a dispersion liquid on the surface of the aramid fiber and then drying the aramid fiber under the condition of being contacted with air, thus obtaining the surface modified aramid fiber, wherein a silane coupling agent has a structure in the formula (I) in the specification; n is 2 or 4; and R1, R2 and R3 are independently selected from alkyl with number of carbon atoms being 1-5. When being adopted to produce composite materials, the aramid fiber prepared by the surface modification method provided by the invention can prevent precipitation and deposition of base materials while improving the mechanical properties of the composite materials and is simple, easy and safe in production operation. The invention also provides a static sealing material. The static sealing material adopts the surface modified aramid fiber and has relatively good mechanical property, sealing property and other properties.

Description

technical field [0001] The invention relates to the technical field of aramid fibers, in particular to a method for surface modification of aramid fibers, a surface-modified aramid fiber and a static sealing material. Background technique [0002] Aramid fiber is aromatic polyamide fiber, which is a new type of high-tech synthetic fiber. The benzene ring of the aramid fiber connects the amide group to form a rod-shaped rigid macromolecular chain structure, which has a high structural integrity and a high glass transition temperature. It has no obvious shrinkage and creep at 200 ° C, and is thermally stable at 500 ° C. It is still very resistant, and it also has excellent corrosion resistance to chemicals such as acids, alkalis and organic solvents. Therefore, the use of aramid fiber has created a new era of high-strength, high-modulus and high-temperature-resistant fibers, and aramid fiber is gradually becoming the preferred structural material in aerospace and military ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/513C08J5/06C08L9/02C08L11/00C08L7/00C08L9/06C08L83/04C08L27/12D06M101/36
Inventor 梁永久刘永然董德文冯美兰
Owner 廊坊佰昂密封材料有限公司
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