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Aramid fiber reinforced core having self repair function, and preparation method thereof

A self-repairing technology of aramid fiber, applied in the direction of fiber type, fiber treatment, fiber mechanical structure, etc., can solve the problems of macroscopic crack damage, shorten service life, and affect the normal use of optical cables, so as to speed up healing, improve bending toughness, The effect of optimizing compatibility

Inactive Publication Date: 2017-08-11
HAIAN INST OF HIGH TECH RES NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a polymer composite material, aramid fiber cable reinforcement core will inevitably produce local damage and microcracks during the pultrusion process, which will cause macroscopic cracks and damage, which will affect the normal use of the cable and shorten the service life

Method used

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  • Aramid fiber reinforced core having self repair function, and preparation method thereof
  • Aramid fiber reinforced core having self repair function, and preparation method thereof
  • Aramid fiber reinforced core having self repair function, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The overall pultrusion process is the same as the comparative example, except that the epoxy resin is modified with furan ring to improve the toughness, strength and interface compatibility of the optical cable core.

[0044] Furan ring-modified epoxy resin, its specific implementation steps are as follows:

[0045] (1) Under the cosolvent environment, add furfurylamine and epichlorohydrin dropwise at room temperature, and the ratio of furfurylamine, epichlorohydrin and solvent is divided into: 8~30 parts: 25~80 parts: 0~20 parts, The reaction generates chloroethanolamine.

[0046] (2) under the room temperature environment, 50~125 parts of 40~50% (weight percent) NaOH aqueous solutions are added to the above-mentioned chloroethanolamine, and the chloroethanolamine is dehydrated and cyclized,

[0047] (3) Use ether to extract the glycidylamine epoxy resin, collect the organic phase solution and distill under reduced pressure to remove the organic solvent (vacuum pressu...

Embodiment 2

[0053] The overall pultrusion process is the same as in Example 1, except that a catalyst for promoting repair is added to promote the internal self-repairing performance of the material, and the formula (parts by weight) is as follows:

[0054]

[0055] After the pultrusion is completed, the above-obtained optical cable core is wound.

[0056] The optical cable core obtained in this example has a minimum bending radius of 0.5-1.5 cm, an elongation at break of 7%, and a repair rate of 50%.

Embodiment 3

[0058] The overall pultrusion process is the same as in Example 1, except that a catalyst for promoting repair is added to promote the internal self-repairing performance of the material, and the formula (parts by weight) is as follows:

[0059]

[0060] After the pultrusion is completed, the above-obtained optical cable core is wound.

[0061] The optical cable core obtained in this example has a minimum bending radius of 0.5-1.5 cm, an elongation at break of 6%, and a repair rate of 50%.

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Abstract

The invention discloses an aramid fiber reinforced core having the self repair function, and a preparation method thereof. The reinforced core comprises aramid fiber and modified thermosetting resin matrix, wherein an active repair crosslinking group is introduced to the modified resin, under the action of catalyst, the reinforced core is made to have the self repair function. According to the method, characteristics of the self repair resin material and the aramid fiber are fully utilized, material fracture points can be discovered in advance, timely repair is carried out for the fracture points, and a repair rate reaches up to 80%. The method is advantaged in that not only can light weight and high strength be realized, permanent insulation property is realized, but also service life of optical cables can be prolonged through introducing the self repair group, and cost is saved.

Description

technical field [0001] The present application relates to the field of optical cable reinforced cores, in particular to a self-healing aramid fiber reinforced core and a preparation method thereof. Background technique [0002] The main component of the optical fiber in the optical cable is high-purity quartz glass, and the minimum diameter is only 0.25mm. Its tensile and bending resistance is very fragile, so it is necessary to use a reinforcement (aramid fiber optical cable reinforced core) and a sheath to carry external force to ensure its use. strength. As a polymer composite material, aramid fiber optic cable reinforcement core will inevitably produce local damage and micro-cracks during the pultrusion process, which will lead to macro-cracks and damage, which will affect the normal use of the optical cable and shorten the service life. [0003] With the release of the "Broadband China" strategy and the acceleration of LTE construction, the demand for optical fibers an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/44D06M15/55D06M15/51D06M13/224D06M11/76D06M11/45D06M101/36
CPCG02B6/4434D06M11/45D06M11/76D06M13/224D06M15/51D06M15/55D06M2101/36G02B6/4479
Inventor 任华曹婷婷张鹏飞张亚仇叶云
Owner HAIAN INST OF HIGH TECH RES NANJING UNIV
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