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Preparation method of high-orientation communicated BN composite fiber material

A composite fiber and high-orientation technology, which is applied in fiber processing, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of poor orientation of BN and incoherent heat conduction paths, and achieve better orientation, better heat dissipation effect, and better heat dissipation effect Effect

Active Publication Date: 2019-07-23
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for preparing a highly oriented and connected BN composite fiber material, which solves the problems of poor orientation of composite BN and incoherent thermal conduction paths in the prior art, and improves the thermal conductivity of the composite material

Method used

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  • Preparation method of high-orientation communicated BN composite fiber material
  • Preparation method of high-orientation communicated BN composite fiber material
  • Preparation method of high-orientation communicated BN composite fiber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Implementation 1 A preparation method of highly oriented and connected BN-PVA composite fibers

[0043] Step 1. Completely dissolve 1g of polyvinyl alcohol in 17.4g of solvent water, add 1.6g of BN nano-short fibers with a diameter of 300-400nm and an aspect ratio of 5 and BN nano-sheets with a diameter of 50-100nm. Nano-materials, wherein the ratio of BN nano-short fibers to BN nano-materials is 1:1, and the inner core spinning solution is obtained after mixing; 1.4g polyvinyl alcohol is dissolved in 18.2g solvent water, and 0.4g of the above-mentioned BN nano-materials are added, and mixed evenly Afterwards, shell spinning solution is obtained;

[0044] Step 2, the inner core spinning solution is ultrasonically treated for 10 minutes, and the outer shell spinning solution is ultrasonically treated for 30 minutes;

[0045] Step 3. Put the shell spinning solution into the shell propulsion pump, and the inner core spinning solution into the core propulsion pump. The spi...

Embodiment 2

[0047] Embodiment 2 A kind of preparation method of highly oriented and connected BN-PVP composite fiber

[0048] Step 1, first completely dissolve 1.4g of polyvinylpyrrolidone in 16g of solvent ethanol, add 2.4g of BN nano-short fibers with a diameter of 900-1000nm and an aspect ratio of 100 and BN nano-sheets with a diameter of 150-200nm Mixed BN nanomaterials and 0.2g polyethylene glycol, wherein the ratio of BN nano short fibers to BN nanomaterials is 0.5:1, and after mixing uniformly, inner core spinning solution is obtained; 1.8g polyvinylpyrrolidone is dissolved in In 17.5g of solvent ethanol, add 0.4g of the above-mentioned BN nanomaterials and 0.1g of polyethylene glycol, and mix uniformly to obtain the shell spinning solution;

[0049] Step 2. Ultrasonic treatment of the inner core spinning solution for 15 minutes, and ultrasonic treatment of the outer shell spinning solution for 30 minutes;

[0050] Step 3. Put the shell spinning liquid into the shell propulsion pu...

Embodiment 3

[0052] Embodiment 3 A kind of preparation method of highly oriented and connected BN-PS composite fiber

[0053] Step 1. First, completely dissolve 2.6g of polystyrene in 13g of solvent N,N-dimethylformamide, add 4g of BN nano-short fibers with a diameter of 500-600nm and an aspect ratio of 20 and a diameter of 50-100nm BN nanomaterials mixed with BN nanosheets and 0.4g polyethyleneimine, wherein the ratio of BN nano short fibers to BN nanomaterials is 0.3:1, and the inner core spinning solution is obtained after mixing evenly; 6g polystyrene is completely dissolved In 12.8 g of solvent N,N-dimethylformamide, 1 g of the above-mentioned BN nanomaterial and 0.2 g of polyethyleneimine were added, and mixed uniformly to obtain a shell spinning solution.

[0054] Step 2. Ultrasonic treatment of the inner core spinning solution for 20 minutes, and ultrasonic treatment of the outer shell spinning solution for 30 minutes;

[0055] Step 3. Put the shell spinning liquid into the shell ...

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Abstract

The invention discloses a preparation method of a high-orientation communicated BN composite fiber material. According to the method, BN nano-sheets or BN nano-particles with the diameters in the range from 50 nm to 200 nm are selected and added into a polymer solution to obtain an inner core spinning solution and an outer shell spinning solution, and the high-orientation communicated BN compositefiber material is obtained after coaxial directional electrostatic spinning and mechanical stretching treatment. The high-orientation communicated BN composite fiber material prepared by means of themethod improves the BN orientation; a coherent and perfect heat conduction passage of the formed high-orientation communicated BN composite fiber material has a better heat dissipation effect and better orientation in the field of heat dissipation and insulation and obtains a broad application prospect in the fields of microelectronic packaging, electrical insulation and LED illumination.

Description

technical field [0001] The invention belongs to the field of composite fiber preparation and relates to a preparation method of highly oriented and connected BN composite fiber material. Background technique [0002] Boron nitride (BN) is an excellent graphite-like structure inorganic high thermal conductivity insulating material, because of its extremely high in-plane thermal conductivity, high temperature stability, high insulation resistance and high breakdown strength, low dielectric constant and low Dielectric loss, excellent oxidation resistance and chemical corrosion resistance are widely used in aerospace, electrical engineering, microelectronic devices and metallurgical industries. [0003] BN / polymer composite materials have the advantages of low cost, non-toxic and environmentally friendly, and convenient operation. They have become a research hotspot in high thermal conductivity insulating materials and have been widely used in the fields of microelectronic packa...

Claims

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Application Information

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IPC IPC(8): D01F1/10D01F8/10D01D5/00D04H1/4382D04H1/728
CPCD01D5/003D01F1/10D01F8/10D04H1/4382D04H1/728
Inventor 汤玉斐刘照伟赵康王田郑美玲
Owner XIAN UNIV OF TECH
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