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Composite fiber, preparation method of composite fiber and electronic component

A composite fiber and molecular chain technology, applied in the field of composite fiber and its preparation method and electronic components, can solve the problems of low thermal conductivity and limited application

Active Publication Date: 2021-10-08
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the intrinsic thermal conductivity of existing polymer fibers is usually low, which limits their further application in the field of electronic thermal management

Method used

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  • Composite fiber, preparation method of composite fiber and electronic component
  • Composite fiber, preparation method of composite fiber and electronic component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment has prepared a kind of composite fiber, and specific process comprises the following steps:

[0025] S1. Weigh 0.6g of carbon material modified dispersant TNWDIS at room temperature and add it to 100g of DMSO solution, stir with a magnetic stirrer for 20min to make TNWDIS evenly dispersed; add 2g of TNSM2 carbon nanotubes (CNTs), and stir with a magnetic stirrer , so that the carbon nanotubes are completely wetted by the solvent DMSO solution instead of floating on the water surface; then ultrasonic treatment for 5 minutes, the dispersion liquid is taken out and placed in ice water to cool, defoam, and then continue ultrasonication for a total of 30 minutes; after the ultrasonic , the dispersion liquid was centrifugally settled to remove undispersed agglomerated particles, the centrifugal speed was 2000r / min, and the centrifugal time was 30min; liquid, denoted as the first dispersion liquid A 1 . Dry the lower layer and precipitate to constant weight, ...

Embodiment 2

[0030] This embodiment has prepared a kind of composite fiber, and specific process comprises the following steps:

[0031]S1. Weigh 2g of TNSM2 carbon nanotubes (CNTs) at room temperature and add them to 100g of DMSO solution, stir with a magnetic stirrer to make the carbon nanotubes completely wetted by the DMSO solution; then ultrasonically treat for 5min, take out the dispersion and let it stand Cool in ice water, defoam, and then continue to sonicate for a total of 30min; Pass the upper liquid through a 300-mesh filter cloth to obtain the final dispersion of carbon nanotubes (CNTs), which is referred to as the first dispersion A 2 . Dry the lower layer and precipitate to constant weight, denoted as G 2 , the actual content of carbon nanotubes in the dispersion = 2-G 2 .

[0032] S2, at normal temperature, weigh 20g of PVA powder (model PVA-224, degree of alcoholysis 88%, degree of polymerization 2400), wash with deionized water, and then put it into an oven for drying...

Embodiment 3

[0036] This embodiment has prepared a kind of composite fiber, and specific process comprises the following steps:

[0037] S1. Weigh 0.6g carbon material modified dispersant TNWDIS at room temperature, add 58g dimethyl sulfoxide (DMSO) and 42mL deionized water blend solution, stir for 20min with a magnetic stirrer, so that TNWDIS is uniformly dispersed; add 2gTNSM2 Model carbon nanotubes (CNTs), use a magnetic stirrer to stir, so that the carbon nanotubes are completely wetted by the solvent DMSO / water blend solution, instead of floating on the water; then ultrasonic treatment for 5min, the dispersion is taken out and placed on ice Cool in water, defoam, and then continue ultrasonication for a total of 30 minutes; after the end of ultrasonication, centrifugally settle the dispersion to remove undispersed aggregated particles; The liquid passes through a 300-mesh filter cloth to obtain the final dispersion of carbon nanotubes (CNTs), which is referred to as the first dispersio...

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Abstract

The invention discloses a composite fiber, a preparation method of the composite fiber and an electronic component. The preparation method of the composite fiber comprises the following steps of mixing a biodegradable water-soluble polymer, a heat-conducting filler and a solvent to prepare a spinning solution, and performing spinning by adopting the spinning solution to prepare a nascent composite fiber, wherein before spinning, the spinning solution is subjected to molecular chain disentanglement treatment; and / or, after spinning, stretching treatment is performed on the nascent composite fiber. Through the mode, the heat-conducting filler is added into a polymer matrix to construct a heat-conducting channel in the polymer matrix, and the spinning solution is subjected to molecular chain disentangling treatment to improve the molecular crystallinity and orientation degree, and / or the nascent composite fiber is subjected to stretching treatment to optimize the orientation and arrangement of the heat-conducting filler in the polymer fiber matrix, so that the prepared composite fiber has high thermal conductivity.

Description

technical field [0001] The invention relates to the technical field of heat-conducting polymer materials, in particular to a composite fiber, a preparation method thereof, and an electronic component. Background technique [0002] With the rapid development of the microelectronics industry, the integration of electronic components has increased, and the heat flux of circuit boards has continued to increase. The demand for materials that can achieve effective heat conduction and heat dissipation in various fields of the electronics industry has been continuously upgraded. The existing heat conduction and heat dissipation materials can no longer keep up with the development of the electronics industry, and the effective thermal management of electronic components has become a research hotspot. Traditional metal-based, ceramic-based, and carbon-based thermally conductive materials have defects such as poor corrosion resistance, poor insulation performance, poor impact resistanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/50D01F1/10D01D5/14D01D1/02D01D10/02D01D5/06
CPCD01F6/50D01F1/10D01D5/14D01D1/02D01D10/02D01D5/06
Inventor 祝渊曾少博吕尤杨景西蒋文龙
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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