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Modified nano cobalt ferrite/arylene ether nitrile dielectric composite material and preparation process thereof

A technology of nano-cobalt ferrite and poly(arylene ether nitrile), which is applied in the field of polymer dielectric materials, can solve the problems of increased dielectric loss of composite materials, weakened mechanical properties of composite materials, low degree of dispersion, etc. Good processability, avoid agglomeration effect

Inactive Publication Date: 2018-11-16
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large specific surface area of ​​nanoparticles, they are easy to agglomerate, have a low degree of dispersion in organic polymers, and even directly form holes or conductive paths, resulting in a substantial increase in the dielectric loss of the composite material and greatly weakening the composite material. Mechanical behavior

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The modified nano-cobalt ferrite / polyarylether nitrile dielectric composite material of this embodiment uses polyarylether nitrile as a matrix and uses modified nano-cobalt ferrite as a filler; the polyarylether nitrile and modified nano-ferric acid The mass ratio of cobalt is 100:1; the modified nano-cobalt ferrite has a core-shell structure with the nano-cobalt ferrite as the inner core and silica as the outer shell.

[0037] The process for preparing the modified nano-cobalt ferrite / polyarylether nitrile dielectric composite material in this embodiment includes the following steps:

[0038] Step 1, using ethyl orthosilicate to modify nano-cobalt ferrite to obtain modified nano-cobalt ferrite; the specific process of the modification is as follows:

[0039] Step 101, mix 23mL of absolute ethanol, 1mL of water and 4.6mL of ammonia water to prepare solution A; the mass fraction of the ammonia water is 20%;

[0040] Step 102, mix 23mL of absolute ethanol and 1.38mL of e...

Embodiment 2

[0048] The modified nano-cobalt ferrite / polyarylether nitrile dielectric composite material of this embodiment uses polyarylether nitrile as a matrix and uses modified nano-cobalt ferrite as a filler; the polyarylether nitrile and modified nano-ferric acid The mass ratio of cobalt is 100:15; the modified nano-cobalt ferrite has a core-shell structure with the nano-cobalt ferrite as the inner core and silicon dioxide, the decomposition product of modifier ethyl orthosilicate, as the outer shell.

[0049] The process for preparing the modified nano-cobalt ferrite / polyarylether nitrile dielectric composite material in this embodiment includes the following steps:

[0050] Step 1, using ethyl orthosilicate to modify nano-cobalt ferrite to obtain modified nano-cobalt ferrite; the specific process of the modification is as follows:

[0051] Step 101, mix 23mL of absolute ethanol, 1.5mL of water and 4.6mL of ammonia water to prepare solution A; the mass fraction of the ammonia water ...

Embodiment 3

[0060] The modified nano-cobalt ferrite / polyarylether nitrile dielectric composite material of this embodiment uses polyarylether nitrile as a matrix and uses modified nano-cobalt ferrite as a filler; the polyarylether nitrile and modified nano-ferric acid The mass ratio of cobalt is 100:20; the modified nano-cobalt ferrite has a core-shell structure with the nano-cobalt ferrite as the inner core and silica as the outer shell.

[0061] The process for preparing the modified nano-cobalt ferrite / polyarylether nitrile dielectric composite material in this embodiment includes the following steps:

[0062] Step 1, using ethyl orthosilicate to modify nano-cobalt ferrite to obtain modified nano-cobalt ferrite; the specific process of the modification is as follows:

[0063] Step 101, mix 10mL of absolute ethanol, 1.5mL of water and 2mL of ammonia water to prepare solution A; the mass fraction of the ammonia water is 20%;

[0064] Step 102, mixing 10mL of absolute ethanol and 2.3mL o...

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Abstract

The invention discloses a modified nano cobalt ferrite / arylene ether nitrile dielectric composite material which comprises arylene ether nitrile as a substrate and modified nano cobalt ferrite as packing, wherein the modified nano cobalt ferrite is of a core-shell structure with nano cobalt ferrite as a core and a high polymer or a decomposition substance of a modifier as a shell. The invention further discloses a preparation process of the modified nano cobalt ferrite / arylene ether nitrile dielectric composite material. The process comprises the following steps: putting modified nano cobalt ferrite into DMSO (Dimethylsulfoxide), adding phenolphthalein, 2,6-dichlorobenzene nitrile, anhydrous K2CO3 and methylbenzene to carry out a reaction, carrying out dilution, precipitation, purificationand drying, and carrying out hot-pressing molding, thereby obtaining a product. Due to the core-shell structure of the dielectric composite material, the compatibility of the modified nano cobalt ferrite and the arylene ether nitrile is improved, so that the dielectric constant of the material is increased; by adopting the method disclosed by the invention, the dispersibility of the modified nanocobalt ferrite in the arylene ether nitrile is improved, so that the dielectric constant of the material is further increased, and meanwhile the mechanical properties of the material are improved.

Description

technical field [0001] The invention belongs to the technical field of polymer dielectric materials, and in particular relates to a modified nano cobalt ferrite / polyarylether nitrile dielectric composite material and a preparation process thereof. Background technique [0002] With the rapid development of the electronic technology industry, the application of high dielectric constant materials in the field of microelectronics such as capacitors and energy storage has received extensive attention. The dielectric constant of a material often determines the level of device miniaturization. [0003] Polyarylether nitrile is a kind of semi-crystalline polymer with a large number of benzene rings and ether bonds in the main chain and cyano groups in the side chain. A large number of benzene rings in its structure endow the material with excellent high temperature resistance, high strength, high modulus and excellent chemical resistance, while the highly polar cyano group enhance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/10C08K9/06C08K9/04C08K3/24C08F112/08C08F2/44
CPCC08F112/08C08K3/24C08K9/04C08K9/06C08K9/08C08K2201/011C08L2201/08C08L2203/20C08L71/00C08F2/44
Inventor 贺新福周均龙雪颖周文英周安宁
Owner XIAN UNIV OF SCI & TECH
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