High-dielectric composite material, as well as preparation method and application thereof

A composite material and high dielectric technology, applied in the field of nanocomposite materials, can solve problems such as brittleness and poor mechanical properties, and achieve the effects of improving interfacial compatibility, improving dispersion, and facilitating formation and transfer.

Inactive Publication Date: 2013-09-11
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of brittleness and poor mechanical properties in the preparation of high dielectric constant dielectric materials by ceramic filled polymers, and provide a composite material with higher dielectric constant and tensile strength

Method used

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  • High-dielectric composite material, as well as preparation method and application thereof
  • High-dielectric composite material, as well as preparation method and application thereof
  • High-dielectric composite material, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Preparation of high dielectric composite materials:

[0042] (1) Add 5g PVDF into a three-necked bottle containing 20ml NMP, stir until it is completely dissolved, put the three-necked bottle in an oil bath at 25°C, add 5g p-CMS, and pass N 2 , put the reaction bottle in a 60°C oil bath for 10h, pour the solution into 200ml of dichloromethane to precipitate and centrifuge, and dry it at a vacuum of 80KPa and a temperature of 90°C to obtain active benzyl chloride on the molecular chain The PVDF of group; 30mlDMF is added in the 100ml spherical condenser with magnetic stirring bar, slowly add 3g obtained product and 1g o-CuPc, stir to make solid dissolve completely, in N 2 Add 1.5ml triethylamine to the atmosphere, stir at 60°C for 20h and stop heating; pour the solution into 300ml distilled water to precipitate the product, and dry it in vacuum to obtain PVDF with o-CuPc grafted on the molecular chain;

[0043] (2) Place 1.5g of CNTs in 40ml of 30% KOH aqueous soluti...

Embodiment 2

[0049] 1. Preparation of high dielectric composite materials:

[0050] (1) Add 3.5g PVDF into a three-necked bottle containing 30ml NMP, stir until it is completely dissolved, put the three-necked bottle in an oil bath at 25°C, add 3.5g p-CMS, and pass N 2 , put the reaction bottle in an 80°C oil bath for 5 hours, pour the solution into 350ml of dichloromethane to precipitate and centrifuge, and dry it at a vacuum of 80KPa and a temperature of 80°C to obtain active benzyl chloride on the molecular chain The PVDF of group; Add 30ml DMF into the 100ml spherical condenser with magnetic stirrer, slowly add 3g of the obtained product and 1g o-CuPc, stir to dissolve the solid completely, in N 2 Add 0.5ml triethylamine to the atmosphere, stir at 80°C for 10h and stop heating. The solution was poured into 450 ml of distilled water to precipitate the product, and dried in vacuum to obtain PVDF with o-CuPc grafted on the molecular chain.

[0051] (2) Place 1g of CNTs in 30ml of 30% Na...

Embodiment 3

[0057] 1. Preparation of high dielectric composite materials:

[0058] (1) Add 4g of PVDF into a three-necked bottle containing 40ml of NMP, stir until completely dissolved, put the three-necked bottle in an oil bath at 25°C, add 4g of p-CMS, and pass N 2 , put the reaction bottle into a 70°C oil bath for 8 hours, pour the solution into 600ml of dichloromethane to precipitate and centrifuge, and dry it at a vacuum of 80KPa and a temperature of 100°C to obtain active benzyl chloride on the molecular chain The PVDF of group; 40mlDMF is added in the 100ml spherical condenser with magnetic stirring bar, slowly add 3g obtained product and 1g o-CuPc, stir to make solid dissolve completely, in N 2 Add 1ml of triethylamine to the atmosphere, stir at 70°C for 15h and stop heating; pour the solution into 500ml of distilled water to precipitate the product, and dry it in vacuum to obtain PVDF with o-CuPc grafted on the molecular chain;

[0059] (2) Place 1g of CNTs in 50ml of 30% NaOH a...

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Abstract

The invention relates to a high-dielectric composite material, as well as a preparation method and an application thereof. The composite material utilizes polyvinylidene fluoride as a basal body and a multi-walled carbon nanotube as a packing, a copper phthalocyanine oligomer is adopted to wrap the surface of the multi-walled carbon nanotube, and polyvinylidene fluoride is grafted, wherein the copper phthalocyanine oligomer plays a role of a flexible interface layer between the multi-walled carbon nanotube and the polyvinylidene fluoride so as to improve the compatibility of an interphase interface. Compared with an unmodified carbon nanotubes (CNTs) packing polymer composite material, the high-dielectric composite material adopts the copper phthalocyanine oligomer for the interphase interface, the dispersibility of the CNTs can be improved, the interface compatibility of organic / inorganic phases is also improved, and the interface polarization formation and transmission are benefited, so that the dielectric constant is increased, the breakdown field strength of the material is reduced, and the high-dielectric composite material is suitable for producing high-dielectric devices for electronic circuit boards.

Description

technical field [0001] The invention relates to a high-dielectric composite material with a flexible interface of a copper phthalocyanine oligomer. The preparation method and application thereof belong to the technical field of nanocomposite materials. Background technique [0002] High dielectric materials have very important applications in the information, electronics and electrical industries, especially in high energy storage capacitors. The production of polymer matrix composites with high dielectric constant at low cost has become a hot spot in the industry in recent years. . At present, the principle of improving the dielectric constant of polymers at home and abroad can be summarized as two main ways. One is to compound high dielectric constant ceramic powder with polymers, but because the elastic modulus of ceramic materials is much larger than that of polymer matrix , making this type of composite material less flexible. Another approach is based on the percolat...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08K9/10C08K7/00C08K3/04C08F14/22C08F8/30
Inventor 徐海萍吴光褀李晓龙
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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