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Preparation method and application of high-thermal-conductivity aromatic polyamide fibers

An aromatic polyamide, high thermal conductivity technology, applied in the direction of single-component polyamide rayon, fiber chemical characteristics, rayon manufacturing, etc., to achieve the effect of improving thermal conductivity and reducing diffusion path resistance

Active Publication Date: 2017-03-15
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no matter what method is used to prepare meta-aramid fibers, there is little improvement and promotion of the thermal conductivity of aramid fibers in the prior art

Method used

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  • Preparation method and application of high-thermal-conductivity aromatic polyamide fibers

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Embodiment 1

[0029] A preparation method of the high thermal conductivity aromatic polyamide fiber of the present invention, comprises the following steps:

[0030] (1) Dissolve 2g of graphene oxide in 1000mL of DMAc by ultrasonic and mechanical stirring at room temperature for 1h, then add 3000mL of 1,6-hexanediamine, continue ultrasonic dispersion for 1h; then add 0.1g of aminated coupling agent HATU, and transferred to a 60°C water bath and refluxed for 6 hours; after the reaction was completed, the product was diluted with ethanol, filtered, and the excess 1,6-hexamethylenediamine was washed with ethanol, and finally the product was dried; after the above pretreatment The graphene oxide powder was ultrasonically dispersed in DMAc, and a 1% dispersion was finally prepared.

[0031] (2) Under the protection of nitrogen, add the m-phenylenediamine (MPD) monomer purified by vacuum distillation into the above dispersion liquid to dissolve, then cool the system to -10°C, and then slowly add ...

Embodiment 2

[0036] A preparation method of the high thermal conductivity aromatic polyamide fiber of the present invention, comprises the following steps:

[0037] (1) Dissolve 2g of graphene oxide in 1000mL of DMAc by ultrasonic and mechanical stirring at room temperature for 1h, then add 3000mL of 1,6-hexanediamine, continue ultrasonic dispersion for 1h; then add 0.1g of aminated coupling agent HATU, and transferred to a water bath at 60°C and refluxed for 6 hours; after the reaction was completed, the product was diluted with ethanol, filtered, and the excess 1,6-hexamethylenediamine was rinsed with ethanol, and finally the product was dried; the above pretreated The graphene oxide powder was dispersed in DMAc by ultrasonic, and a 1% dispersion was finally prepared.

[0038] (2) Under the protection of nitrogen, add the m-phenylenediamine (MPD) monomer refined by vacuum distillation into the above dispersion liquid to dissolve, then cool the system to -10°C, and slowly add the compound...

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Abstract

A preparation method of high-thermal-conductivity aromatic polyamide fibers includes dispersing oxidized graphene in an organic solvent to obtain dispersion liquid; adding m-phenylenediamine monomers into the dispersion liquid under the protection of inert gas, and cooling a system to a temperature as required by the system; slowly adding part of isophthaloyl dichloride while stirring to allow a polycondensation reaction of the solvent, adding alkaline substances for neutralization, adding the rest isophthaloyl dichloride, and continuing to stir until complete reaction to obtain a meta-position aromatic polyamide resin solution; taking the meta-position aromatic polyamide resin solution as a spinning solution, adopting a dry-spraying and wet-spinning process to spin, and finally preparing the high-thermal-conductivity aromatic polyamide fibers. The high-thermal-conductivity aromatic polyamide fibers have high thermal diffusion coefficients; added carbon nano-materials, graphite nano-materials and the like have antifriction effect, and serve as structure reinforcing materials which obviously improve mechanical properties of aramid fibers.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular relates to a preparation method of aromatic polyamide fiber and the specific application of the product. Background technique [0002] Oil-free self-lubricating spherical plain bearings have outstanding advantages such as self-lubricating, maintenance-free and high reliability. As components with important functions such as load-carrying, aligning, supporting and rotating, their applications are becoming more and more extensive. Indispensable key general-purpose devices. [0003] As the solid lubricating material in the oil-free self-lubricating joint bearing, the fiber fabric liner is fitted between the inner and outer rings of the joint bearing, and plays a vital role in lubrication, isolation and friction reduction in the bearing, and at the same time has the function of reducing mechanical power. Consumption, shock resistance, vibration reduction (shock...

Claims

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Application Information

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IPC IPC(8): D01F6/90D01F1/10C08G69/32C08G69/28
CPCC08G69/28C08G69/32D01F1/10D01F6/905
Inventor 高敬民彭博陈磊姜其斌李鸿岩宋春华
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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