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High-dielectric-constant polymer-potassium salt composite film material and preparation method thereof

A high dielectric constant, polymer technology, applied in metal material coating process, ion implantation plating, coating and other directions, to achieve the effect of low preparation temperature, simple equipment and easy mass production

Inactive Publication Date: 2013-12-18
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 2007, Chen et al. reported that acetylene black (AB) was added to PVDF, and DMF was used as a solvent. The PVDF / AB composite membrane material made by dipping and pulling method had a dielectric constant of about 50 at 1kHz, but this is different from Compared with high dielectric ceramics and bulk composite materials, there is still a big gap

Method used

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  • High-dielectric-constant polymer-potassium salt composite film material and preparation method thereof
  • High-dielectric-constant polymer-potassium salt composite film material and preparation method thereof
  • High-dielectric-constant polymer-potassium salt composite film material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Potassium salt used is potassium carbonate (K 2 CO 3 ), the polymer polyvinylidene fluoride (PVDF) and K 2 CO 3 Calculate the amount of raw materials according to the ratio of volume fraction 96:4, and weigh the raw materials with an electronic balance; then put them into a ball mill jar, use absolute ethanol as a medium, and ball mill on a conventional ball mill for 6 hours, and the mixed powder after ball milling The material is dried in a constant temperature drying oven; then add 15ml of organic solvent N,N-dimethylformamide (DMF) to obtain a mixed liquid, and the mixed liquid is heated to 60°C on a magnetic stirrer, and the PVDF is fully dissolved by stirring; Ultrasonic cleaner ultrasonically oscillates to K 2 CO 3 Evenly disperse in the dissolved liquid to obtain a composite liquid; slowly pour the composite liquid on a flat glass sheet cleaned with deionized water and absolute ethanol to make it evenly cast, and then put it in a constant temperature drying o...

Embodiment 2

[0038] Potassium salt used is potassium carbonate (K 2 CO 3 ), the polymer polyvinylidene fluoride (PVDF) and K 2 CO 3Calculate the amount of raw materials according to the ratio of volume fraction 92:8, and weigh the raw materials with an electronic balance; then put them into a ball mill jar, use absolute ethanol as a medium, and ball mill on a conventional ball mill for 8 hours, and the mixed powder after ball milling The material is dried in a constant temperature drying oven; then add 20ml of organic solvent N,N-dimethylformamide (DMF) to obtain a mixed liquid, and the mixed liquid is heated to 80°C on a magnetic stirrer, and the PVDF is fully dissolved by stirring; Ultrasonic cleaner ultrasonically oscillates to K 2 CO 3 Disperse evenly in the dissolved liquid to obtain a composite liquid; slowly pour the composite liquid on a flat glass sheet cleaned with deionized water and absolute ethanol to make it evenly cast, and then put it in a constant temperature drying ov...

Embodiment 3

[0042] Potassium salt used is potassium carbonate (K 2 CO 3 ), the polymer polyvinylidene fluoride (PVDF) and K 2 CO 3 Calculate the amount of raw materials according to the ratio of volume fraction 89:11, weigh the raw materials with an electronic balance; then put them into a ball mill jar, use absolute ethanol as the medium, and ball mill on a conventional ball mill for 10 hours, and the mixed powder after ball milling The material is dried in a constant temperature drying oven; then add 25ml of organic solvent N,N-dimethylformamide (DMF) to obtain a mixed liquid, and the mixed liquid is heated to 80°C on a magnetic stirrer, and stirred to fully dissolve the PVDF; Ultrasonic cleaner ultrasonically oscillates to K 2 CO 3 Uniformly disperse in the dissolved liquid to obtain a composite liquid; slowly pour the composite liquid on a flat glass sheet cleaned with deionized water and absolute ethanol to make it flow uniformly, put it in a constant temperature drying oven, and...

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Abstract

The invention relates to a high-dielectric-constant polymer-potassium salt composite film material and a preparation method thereof. The method comprises: calculating the required amount of the polymer which is polyvinylidene fluoride and the required amount of the potassium slat according to a designed volume percentage ratio; adding an organic solvent into the mixed powder of the polyvinylidene fluoride and the potassium slat after mixing and ball milling, and dissolving the polyvinylidene fluoride by using a magnetic stirrer; after the polyvinylidene fluoride is dissolved, shaking the mixed solution by using ultrasonic waves till the potassium salt dispersed in the mixed solution uniformly; pouring the mixed solution onto a glass sheet to cast the mixed solution, evaporating the organic solvent at a constant temperature and obtaining a composite film; heating the composite film to obtain a composite material sample with a thickness of about 60 to 120 micrometers; and sputtering a metal electrode onto the surface of the sample, and thus obtaining the polyvinylidene fluoride-potassium salt composite film material with a relative dielectric constant of 10<2> to 10<4>. The film material is expected to be widely used in electronic industry and can be used as an energy storage capacitor and the like.

Description

technical field [0001] The invention relates to a composite membrane material and its preparation technology, in particular to a composite membrane material of polymer polyvinylidene fluoride (PVDF) and potassium salt with a high dielectric constant and a preparation method thereof, belonging to the field of dielectric composite materials . Background technique [0002] Due to its excellent dielectric properties, high dielectric materials have broad application prospects in solid capacitors and microwave dielectric components, such as: dynamic random access memory, high-power capacitors, etc. And high dielectric ceramics, such as CaCu 3 Ti 4 o 12 Due to its good dielectric properties, it has been widely valued. However, although high-dielectric ceramics have good dielectric properties, they are relatively brittle and require extremely high preparation temperatures, which limits their applications, especially in integrated circuits. [0003] However, high dielectric poly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08K3/26C08J5/18B29C71/02C23C14/34C23C14/20
Inventor 朱基亮朱波曾子繁孙平汪忠兴郑茂梅王明松刘静朱建国肖定全
Owner SICHUAN UNIV