Chemical modification method and chemical modification device for aramid fibers

A technology for chemical modification of aramid fibers, applied in fiber processing, fiber types, textiles and papermaking, etc., can solve the problems of limited modification effect, low production efficiency and difficulty of aramid fibers, and achieve easy control of the reaction process, Improve efficiency and avoid waste

Active Publication Date: 2015-09-09
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The present invention aims to solve the problem that the existing chemical modification method has limited modification effect on aramid fibers in the process of applying aramid fibers to reinforced composite materials, and provides a chemical modification method for aramid fibers. The introduction of chemically active groups on the surface of the fiber significantly improves the interfacial bonding force between the aramid fiber and the epoxy resin matrix, and improves the mechanical properties of the aramid fiber
[0016] Another object of the present invention is to solve the problem that only a small amount of fibers can be processed at a time in the existing chemical modification, the production efficiency is low, and it is quite difficult to popularize and apply in industry, and to provide a corresponding modification device that can improve Efficiency of modification treatment

Method used

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  • Chemical modification method and chemical modification device for aramid fibers
  • Chemical modification method and chemical modification device for aramid fibers

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A chemical modification method for aramid fibers, comprising the following process steps:

[0048] A. Preparation of surface modification treatment agent

[0049] Under the protection of an inert gas, the acid chloride active reaction reagent or the acid anhydride active reaction reagent is dissolved in an anhydrous strong polar organic solvent to prepare an active solvent system, that is, a surface modification treatment agent; the acid chloride active reaction reagent It is any one of acetyl chloride, propionyl chloride, chloroacetyl chloride, dichloroacetyl chloride, trichloroacetyl chloride, thionyl chloride, chloropropionyl chloride or several mixtures in any proportion; the acid anhydride reactive reagent is acetyl chloride Acid anhydride, propionic anhydride, fluoroacetic anhydride, chloroacetic anhydride, bromoacetic anhydride, iodoacetic anhydride, or a mixture of any of them in any proportion; the strong polar organic solvent is N-methylpyrrolidone , any one ...

Embodiment 2

[0056] On the basis of embodiment 1:

[0057] Preferably, in step A, the volume percent concentration of the acid chloride reactive reagent or acid anhydride reactive reagent dissolved in anhydrous strong polar organic solvent is 10%.

[0058] Preferably, in step B, the reaction temperature is 30° C., and the reaction time is 10 minutes.

[0059] Preferably, in step C, the washing is performed with deionized water at 50°C, and the drying temperature is 120°C.

Embodiment 3

[0061] On the basis of embodiment 1:

[0062] Preferably, in step A, the volume percent concentration of the acid chloride reactive reagent or acid anhydride reactive reagent dissolved in an anhydrous strong polar organic solvent is 50%.

[0063] Preferably, in step B, the reaction temperature is 50° C., and the reaction time is 20 minutes.

[0064] Preferably, in step C, the washing is performed with 80°C deionized water, and the drying temperature is 140°C.

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Abstract

The invention relates to a chemical modification method and a chemical modification device for aramid fibers and belongs to the technical field of chemical synthetic fiber modification. The method includes preparation of a surface modification treatment agent, modification treatment and washing drying, a specific acyl chloride active reaction reagent or anhydride active reaction reagent is dissolved in an anhydrous strong-polar organic solvent so as to subject the aramid fibers to chemical modification, surface performance of the modified aramid fibers can be improved remarkably, joint force between the aramid fibers and an epoxy resin matrix is enhanced significantly, and interlaminar shear strength of the modified aramid fibers can reach 50-59MPa. In addition, softness and dispersibility of the fibers are improved while the aramid fibers are subjected to surface modification, and application performance of the fibers is improved.

Description

technical field [0001] The invention relates to a modification method and a modification device of an aramid fiber. More specifically, the invention relates to a chemical modification method and a modification device of an aramid fiber, belonging to the technical field of chemical synthesis fiber modification. Background technique [0002] Para-aramid fibers mainly include aramid II and aramid III fibers. Aramid II is made of poly-p-phenylene terephthalamide polymer by dry jet wet spinning; Aramid III is copolymerized by introducing a third monomer containing a heterocyclic structure into the molecular structure of Aramid II It is produced by wet spinning after reacting to form a polymer. Both fibers can be used to reinforce composites. [0003] Para-aramid fibers have excellent mechanical properties, especially aramid III fibers are widely used in the field of high-performance composite materials. However, due to the chemical inertness of the surface of aramid fibers, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/10D06M13/188D06M13/21D06M101/36
Inventor 刘克杰彭涛王凤德王成东
Owner CHINA BLUESTAR CHENGRAND CO LTD
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