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Organic composite dielectric film and preparation method thereof

A composite dielectric film, organic technology, applied in the field of dielectric materials, can solve the problems of low energy storage density, limited application of dielectric film capacitors, etc., achieve controllable operation, suitable for large-area production, and reduced dielectric loss Effect

Active Publication Date: 2019-10-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 as 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, each time ultrasonically for 10 minutes, and then place it at 60° C. for vacuum drying for 12 hours to obtain a purified polythiourea solid;

[0042] Step 2: 0.2g of the polythiourea solid in step 2 was dissolved in 1.8g of N-methylpyrrolidone solvent, and fully magnetically stirred and dissolved for 6h to obtain a polythiourea solution with a solut...

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 preparation method thereof. The preparation method comprises the steps that 1, 4,4'-diaminodiphenylmethane, N-methyl-pyrrolidone and phenylene diisothiocyanate are taken as raw materials to synthesize a monomer, and linear high molecular weight polymer polythiourea is synthesized; 2, the polythiourea is dissolved in N-methyl-pyrrolidone solvent to form a homogeneous solution; 3, poly (vinylidene fluoride-trifluoroethylene-fluorochloroethylene) is dissolved in the N-methyl-pyrrolidone solvent to form a homogeneous solution; 4, thesolution obtained from the step 2 and the solution obtained from the step 3 are mixed to obtain a complex solution; and 5, a solution casting method is used, the solution obtained from the step 4 forms a thin film on a silica glass substrate, and the organic composite dielectric film is obtained through vacuum drying. According to the preparation method of the organic composite dielectric film, the organic composite dielectric film with the high energy density can be obtained, the composite dielectric film can still maintain high charging-discharging efficiency, and the stability and dielectric properties of the composite dielectric film are effectively 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 Applications(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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