High dielectric polyimide/carbon nanotube composite material and preparation method thereof

A technology of carbon nanotubes and composite materials, which is applied in the field of high dielectric polyimide/carbon nanotube nanocomposites and its preparation, can solve the problems of carbon nanotubes easy to agglomerate, etc., to improve compatibility and improve dielectric strength. The effect of improving electrical properties and dielectric properties

Inactive Publication Date: 2015-11-25
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbon nanotubes are prone to agglomeration and the surface is chemically inert and difficult to infiltrate with the organic matrix. In order to obtain polymer matrix composites with excellent performance, it is necessary to improve the dispersion uniformity of carbon nanotubes in the matrix [Chen Beiming , Yang Dean. Dispersion method of carbon nanotubes in the preparation of polymer matrix composites. Materials Heralds, 2007,21(5):99-101.]

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) 5g1,2,4,5-pyromellitic dianhydride, 27.5g urea, 0.2g ammonium molybdate, 7.8gCuCl 2 2H 2After O was mixed and ground evenly, it was put into a microwave oven and radiated and heated for 15 minutes at a power of 400w to obtain a dark green intermediate product octacarboxamido copper phthalocyanine. Then wash with 60° C. hot water and acetone three times respectively, and then wash three times with 250 ml of 6M HCl solution and filter. Put this intermediate product into a 500ml three-neck flask, put it into a NaOH solution with a mass concentration of 10%, and hydrolyze it at 85°C until ammonia gas is no longer detected. After the reaction, dilute with distilled water, filter with suction, adjust the filtrate to pH 4 with concentrated hydrochloric acid, let it stand for precipitation, wash the precipitate with methanol several times, separate the product by centrifugation, and dry it in a vacuum oven to obtain octacarboxy CuPc.

[0031] (2) Mix 1 g of carbon nanotub...

Embodiment 2

[0036] (1) 5g1,2,4,5-pyromellitic dianhydride, 27.5g urea, 0.2g ammonium molybdate, 7.8gCuCl 2 2H 2 After O was mixed and ground evenly, it was put into a microwave oven and radiated and heated for 5 minutes under the condition of a power of 800w to obtain a dark green intermediate product octamido copper phthalocyanine. Then wash with 65° C. hot water and acetone three times respectively, and then wash three times with 250 ml of 6M HCl solution and filter. Put this intermediate product into a 500ml three-neck flask, put it into a NaOH solution with a mass concentration of 10%, and hydrolyze it at 85°C until ammonia gas is no longer detected. After the reaction, dilute with distilled water, filter with suction, adjust the filtrate to pH 4 with concentrated hydrochloric acid, let it stand for precipitation, wash the precipitate with methanol several times, separate the product by centrifugation, and dry it in a vacuum oven to obtain octacarboxy CuPc.

[0037] (2) Mix 1 g of c...

Embodiment 3

[0042] (1) 5g1,2,4,5-pyromellitic dianhydride, 27.5g urea, 0.2g ammonium molybdate, 7.8gCuCl 2 2H 2 After O was mixed and ground evenly, it was put into a microwave oven and radiated and heated for 10 minutes under the condition of a power of 600w to obtain a dark green intermediate product octamido-copper phthalocyanine. Then wash with 70° C. hot water and acetone three times respectively, and then wash three times with 250 ml of 6M HCl solution and filter. Put this intermediate product into a 500ml three-neck flask, put it into a NaOH solution with a mass concentration of 10%, and hydrolyze it at 85°C until ammonia gas is no longer detected. After the reaction, dilute with distilled water, filter with suction, adjust the filtrate to pH 4 with concentrated hydrochloric acid, let it stand for precipitation, wash the precipitate with methanol several times, separate the product by centrifugation, and dry it in a vacuum oven to obtain octacarboxy CuPc.

[0043] (2) Mix 1 g of ...

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Abstract

The invention discloses a high dielectric polyimide/carbon nanotube composite material and a preparation method thereof. The preparation method comprises the steps that 1, the surface of a hydroxylation carbon nanotube is coated with a layer of copper phthalocyanine; 2, the high dielectric polyimide/carbon nanotube composite material is prepared. The surface of the hydroxylation carbon nanotube is coated with one layer of copper phthalocyanine through an esterification reaction, so that the disperse state of the carbon nanotube in the polyimide can be improved, and the dielectric performance of the composite material can be improved; meanwhile, due to the fact that the surface of the carbon nanotube is coated with one layer of non-conductive copper phthalocyanine, the problem that the dielectric loss is obviously increased due to the seepage effect can be solved.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, and in particular relates to a high dielectric polyimide / carbon nanotube nanocomposite material and a preparation method thereof. Background technique [0002] In recent years, the development of electronic equipment is changing rapidly, and the widely used capacitors are developing in the direction of high energy storage and miniaturization. The use of materials with high dielectric constants in the preparation of embedded components can facilitate the miniaturization of integrated circuits. At present, the common high dielectric material is inorganic ferroelectric ceramics. Although the dielectric constant is very high, it has many disadvantages such as high brittleness, high processing temperature, and incompatibility with current integrated circuit processing technology. Most polymers are good insulators, and have the advantages of processability and high mechanical strength,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08L79/08C08K9/04C08K7/24
Inventor 王静荣徐海萍杨丹丹
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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