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Thermoplastic polyimide composite material and its production

A composite material and polyimide technology, applied in the field of thermoplastic polyimide-based composite materials and its preparation, to achieve excellent comprehensive performance, easy operation, and the effect of improving thermal conductivity

Active Publication Date: 2007-11-21
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon fiber plain weave cloth is impregnated with organic resin, hot-pressed to 1000°C, and then heat-treated to 3000°C. The ratio of warp yarn to weft yarn of carbon fiber cloth varies between 3 and 10, and its carbon-carbon composite material is in the vertical direction, parallel direction and It has high thermal conductivity in any direction, good impact resistance and high shear strength, but there are pores between the fiber and the matrix, and the improvement of thermal conductivity is limited

Method used

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  • Thermoplastic polyimide composite material and its production

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Select 500g of ABRON-S10 polyamic acid solution from ABR Organic Compound Company, the product report intrinsic viscosity is 1.5~2.5dL / g, and the solid content is 10%, so the solid content of polyamic acid can be calculated to be 50g; 30g of powdery graphite with a particle size of 200 meshes was stirred at high speed for 2 hours to obtain powdery graphite / polyamide impregnated resin. Dip-coat the impregnated resin on the unidirectional carbon fiber cloth with a thickness of 0.20mm, and repeatedly dip-coat until the thickness reaches 0.35mm. According to the usage amount of the polyimide acid solution, it can be determined that the addition amount of the thermally conductive filler 2 is 25 g. Put the obtained greige in an oven for imidization treatment, program the temperature from 100°C to 300°C for 3 hours, and then take it out of the oven after cooling down to 30°C to obtain imidized polyimide Composite fabric. The above-mentioned polyimide composite gray cloth is ...

Embodiment 2

[0031] Select N,N'-dimethylacetyl as the solvent, prepare 700g of polyamic acid solution with a solid content of 10%, and the intrinsic viscosity is 2.0dL / g, so the solid content of the polyamic acid can be calculated to be 70g; 30 g of flaky graphite with a particle size of 300 meshes was stirred at high speed for 2 hours to obtain flaky graphite / polyamide impregnated resin. Dip-coat the impregnated resin on the single-weft carbon fiber cloth with a thickness of 0.25mm, and repeat the dip-coating until the thickness reaches 0.50mm. According to the amount of polyimide acid solution used, it can be determined that the amount of thermally conductive filler 2 added is 32 g. Put the obtained greige in an oven for imidization treatment, program the temperature from 100°C to 300°C for 3 hours, and then take it out of the oven after cooling down to 30°C to obtain imidized polyimide Composite fabric. The above-mentioned polyimide composite gray cloth is cut and stacked according to...

Embodiment 3

[0033]Select N-methylpyrrolidone as a solvent to prepare 600g of polyamic acid solution with a solid content of 10%, and the intrinsic viscosity is 1.7dL / g, so that the solid content of polyamic acid can be calculated to be 60g; adding 30g of polyamic acid with a particle size of 700-mesh copper powder was stirred at high speed for 2 hours to obtain flaky graphite / polyamide impregnated resin. Dip-coat the impregnating resin on the bidirectional carbon fiber plain weave cloth with a thickness of 0.32mm, and repeatedly dip-coat until the thickness reaches 0.60mm. According to the amount of polyimide acid solution used, it can be determined that the added amount of the thermally conductive filler 2 is 18 g. Put the obtained greige into an oven for imidization treatment, program the temperature from 100°C to 300°C for 3 hours, and then take it out of the oven after cooling down to 40°C to obtain imidized polyimide Composite fabric. The above polyimide composite gray cloth is cut...

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Abstract

A thermoplastic polyimide composite material with high-thermal conductivity and its production are disclosed. The raw materials consist of thermoplastic polyamide acid, thermal-conducting filler 1 and thermal-conducting filler 2. The process is carried out by adding thermal-conducting 1 into thermoplastic polyamide acid solution proportionally, high-speed agitating to obtain polyamide solvent impregnated resin containing thermal-conducting filler, dip-coating onto thermal-conducting filler 2, dip coating fiber cloth, putting into baker, imine treating to obtain polyimide composite embryo-cloth. It's simple and convenient, has excellent comprehensive performances and higher thermal-conducting coefficient.

Description

technical field [0001] The invention relates to a thermoplastic polyimide-based composite material and a preparation method thereof, in particular to a high thermal conductivity thermoplastic polyimide-based composite material and a preparation method thereof. Background technique [0002] Thermoplastic polyimide (TPI), which is used in the fields of aerospace, automobile manufacturing, electronics, medical and food processing, has stable mechanical and chemical properties, small thermal deformation, and can withstand the high temperature environment of heat welding. In the semiconductor industry, TPI resin is often used to manufacture wafer carriers, electronic insulating films, printed circuit boards, and high-temperature connectors. With the increasing density of microelectronic components, the high-speed operation, and the rapid change of high temperature in the working environment, whether the electronic components as the heat source can release heat in time has become ...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08K9/00B29C70/60B29C70/34B29C43/02B29C43/58C08K3/04C08K3/28
Inventor 黄培王晓东谷和平朱鹏
Owner NANJING UNIV OF TECH
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