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Organic composite dielectric film and preparation method thereof

A composite dielectric film and organic technology, applied in the field of dielectric materials, can solve the problems of low energy storage density and limited application of dielectric film capacitors, and achieve controllable operation, suitable for large-scale production, improved stability and The effect of dielectric properties

Active Publication Date: 2022-02-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to: aim at the problem that the energy storage density is too low in current dielectric material, cause the application of dielectric film capacitor to be limited, provide a kind of organic composite dielectric film and preparation method thereof

Method used

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  • Organic composite dielectric film and preparation method thereof
  • Organic composite dielectric film and preparation method thereof
  • Organic composite dielectric film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] An organic composite dielectric film and a preparation method thereof, comprising the steps of:

[0040] Step 1: According to the molar ratio of 4,4'-diaminodiphenylmethane and p-phenylene diisothiocyanate is 1:1, weigh 4,4'-diaminodiphenylmethane and p-phenylene diisothiocyanate respectively The acid ester is dispersed in the solvent N-methylpyrrolidone, firstly add 4,4'-diaminodiphenylmethane to dissolve, then add p-phenylene diisothiocyanate, and react for 6 hours under nitrogen atmosphere to obtain polysulfide Urea solution;

[0041] Wash and purify the polythiourea solution obtained in step 1 with methanol for 3 times, ultrasonically for 10 minutes each time, and then place it at 60° C. for vacuum drying for 12 hours to obtain a purified polythiourea solid;

[0042] Step 2: Dissolve 0.2g of the polythiourea solid in step 2 in 1.8g of N-methylpyrrolidone solvent, fully magnetically stir and dissolve for 6h to obtain a polythiourea solution with a solute mass fracti...

Embodiment 2

[0047] An organic composite dielectric film and a preparation method thereof are characterized as follows, comprising the steps of:

[0048] Step 1: According to the molar ratio of 4,4'-diaminodiphenylmethane and p-phenylene diisothiocyanate is 1:1, weigh 4,4'-diaminodiphenylmethane and p-phenylene diisothiocyanate respectively The acid ester is dispersed in the solvent N-methylpyrrolidone, firstly add 4,4'-diaminodiphenylmethane to dissolve, then add p-phenylene diisothiocyanate, and react for 6 hours under nitrogen atmosphere to obtain polysulfide Urea solution;

[0049] Wash and purify the polythiourea solution obtained in step 1 with methanol 4 times, ultrasonically for 10 minutes each time, and then place it at 60° C. for vacuum drying for 12 hours to obtain the purified polythiourea solid;

[0050] Step 2: Dissolve 0.35 g of the polythiourea solid in step 1 in 3.15 g of N-methylpyrrolidone solvent, fully magnetically stir and dissolve for 6 hours to obtain a polythioure...

Embodiment 3

[0055] An organic composite dielectric film and a preparation method thereof are characterized as follows, comprising the steps of:

[0056] Step 1: According to the molar ratio of 4,4'-diaminodiphenylmethane and p-phenylene diisothiocyanate is 1:1, weigh 4,4'-diaminodiphenylmethane and p-phenylene diisothiocyanate respectively The acid ester is dispersed in the solvent N-methylpyrrolidone, firstly add 4,4'-diaminodiphenylmethane to dissolve, then add p-phenylene diisothiocyanate, and react for 6 hours under nitrogen atmosphere to obtain polysulfide Urea solution;

[0057] Wash and purify the polythiourea solution obtained in step 1 with methanol 4 times, ultrasonically for 10 minutes each time, and then place it at 60° C. for vacuum drying for 12 hours to obtain the purified polythiourea solid;

[0058] Step 2: Dissolve 0.45 g of the polythiourea solid in step 1 in 4.05 g of N-methylpyrrolidone solvent, fully magnetically stir and dissolve for 6 hours to obtain a polythioure...

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Abstract

The invention provides an organic composite dielectric film and a preparation method thereof, comprising steps: 1. Using 4,4'-diaminodiphenylmethane, N-methylpyrrolidone and p-phenylene diisothiocyanate as synthetic monomers Raw material, synthetic linear high molecular weight polymer polythiourea; 2, polythiourea is dissolved in N-methylpyrrolidone solvent and forms homogeneous solution; 3, poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) is dissolved in A uniform solution is formed in the N-methylpyrrolidone solvent; 4, the solution obtained in step 2 is mixed with the solution obtained in step 3 to obtain a composite solution; 5, using the solution casting method, the solution obtained in step 4 is placed on a quartz glass substrate Form a thin film, and obtain an organic composite dielectric film through vacuum drying. This preparation method can obtain an organic composite dielectric film with high energy storage density. The composite dielectric film can still maintain a high charge-discharge efficiency under high electric fields, effectively improving The stability and dielectric properties of the composite dielectric film are improved.

Description

technical field [0001] The invention belongs to the technical field of dielectric materials, in particular to an organic composite dielectric film and a preparation method thereof. Background technique [0002] Dielectric film capacitors with high energy density, low loss, and high dielectric constant are required for compact and reliable power systems. At the same time, high-energy-density dielectric capacitors are also required in electrical energy storage devices to meet specific requirements in various fields, such as artificial muscles, capacitors, and smart skin. Among the available electrical energy storage technologies, dielectric capacitors have the highest power density due to their ultrafast charge and discharge capabilities. However, their potential applications are all limited by the relatively low energy density, thus it is necessary to increase the energy density of capacitors. [0003] Poly(vinylidene fluoride) (PVDF) and its copolymers have been extensivel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08L75/02C08J5/18
CPCC08J5/18C08J2327/16C08J2475/02
Inventor 杨亚杰李成维张成光周榆久徐建华
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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