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Carbonyl-containing material-coated barium titanate/polymer composite film and preparation method thereof and application

A technology of coating barium titanate and carbonyl materials, which is applied in the field of thin film dielectric materials, can solve environmental pollution and other problems, and achieve the effects of ensuring flexibility, high electrical breakdown strength, and high energy storage density

Active Publication Date: 2016-03-02
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, the currently commonly used surface treatment method for barium titanate by silane coupling agent or titanate coupling agent needs to be carried out in an organic solvent, and problems such as environmental pollution may occur during the surface treatment process.

Method used

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  • Carbonyl-containing material-coated barium titanate/polymer composite film and preparation method thereof and application
  • Carbonyl-containing material-coated barium titanate/polymer composite film and preparation method thereof and application
  • Carbonyl-containing material-coated barium titanate/polymer composite film and preparation method thereof and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Commercial BaTiO with a particle size of 100 nm 3 Add water and water into a three-necked flask at a mass ratio of 3:20, ultrasonically and stir for 1 hour. Press BaTiO under ultrasound and stirring 3 5% of the mass was added with 3,4,5-trihydroxybenzoic acid, ultrasonicated and stirred for 1 h. Subsequently, the temperature was raised to 75°C under stirring, kept for 24 hours, then cooled to room temperature and settled for 24 hours. Centrifuge the upper layer mixture, and add the precipitated nanoparticles into water to wash. The mass ratio of nanoparticles to water is 1:20. After ultrasonication and stirring for 1 hour, centrifuge and dry to obtain the particles coated with 3,4,5-trihydroxyl Barium titanate nanoparticles of benzoic acid (abbreviated as BT@GA).

[0052] Dissolve polyvinylidene fluoride-co-chlorotrifluoroethylene (molecular weight: 300,000) in N,N-dimethylformamide to obtain a 10 wt% solution, and let it stand for 24 hours for defoaming.

[0053] T...

Embodiment 2

[0076] Commercially available barium titanate with a particle size of 100nm was coated with 4,4'-dihydroxybenzophenone containing a high-moment carbonyl functional group in the same manner as in Example 1, and polyvinylidene fluoride- 0%, 2.9%, 5.6%, 8.2%, 10.6%, 12.9% of the volume of co-chlorotrifluoroethylene added polyvinylidene fluoride-co-chlorotrifluoroethylene (molecular weight: 300,000) In formamide solution, ultrasonic, stirring and dispersing, casting into film, hot pressing treatment. The dielectric constant and electrical breakdown strength were tested in the same way, and the results are shown in Table 5 respectively.

[0077] According to the energy storage density U e =1 / 2·ε 0 ·ε r ·E b 2 Calculate the theoretical energy storage density of the above film capacitors, see Table 5.

[0078] Under the electric field strength of 0.5MV / cm, the D-E curve of the above-mentioned composite film was tested by the Sawyer-Tower circuit, and the charge density and disc...

Embodiment 3

[0085] Commercially available barium titanate with a particle size of 100 nm is coated with glycine containing a high-moment carbonyl functional group in the same manner as in Example 1, and the volume of polyvinylidene fluoride-co-chlorotrifluoroethylene is 0%. , 2.9%, 5.6%, 8.2%, 10.6%, 12.9% were added to the N,N-dimethylformamide solution of polyvinylidene fluoride-co-chlorotrifluoroethylene (molecular weight: 300,000), ultrasonically and stirred to disperse, Film casting, hot pressing treatment. The dielectric constant and electrical breakdown strength were tested in the same way, and the results are shown in Table 7 respectively.

[0086] According to the energy storage density U e =1 / 2·ε 0 ·ε r ·E b 2 Calculate the theoretical energy storage density of the above film capacitors, see Table 7.

[0087] Under the electric field strength of 0.5MV / cm, the D-E curve of the above-mentioned composite film was tested by the Sawyer-Tower circuit, and the charge density and ...

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Abstract

The invention discloses a carbonyl-containing material-coated barium titanate / polymer composite film and a preparation method thereof and application. The carbonyl-containing material-coated barium titanate / polymer composite film is prepared through the following method which comprises a step 1) of mixing dispersion liquid of nanometer barium titanate and a carbonyl-containing material, and obtaining composite nanoparticles coating the carbonyl-containing material; a step 2) of dispersing the composite nanoparticles coating the carbonyl-containing material into polymer composited solution, and obtaining mixed dispersion liquid; a step 3) of causing the mixed dispersion liquid in the step 2) to undergo tape casting, removing a solvent to form a film, and then causing the film to undergo hot pressing and cooling to obtain the carbonyl-containing material-coated barium titanate / polymer composite film. The carbonyl-containing material-coated barium titanate / polymer composite film can achieve high dielectric constant (30 or above), high electric breakdown strength (250 MV / m or above) and high discharge density are guaranteed, and the flexibility of the capacitor composite film is maintained. The carbonyl-containing material-coated barium titanate / polymer composite film is applied to the preparation of a flexible electronic device.

Description

technical field [0001] The invention relates to a carbonyl-containing material-coated barium titanate / polymer composite film and a preparation method and application thereof, belonging to the field of film dielectric materials. Background technique [0002] With the rapid development of electronics, electricity, information, and new energy fields, polymer film capacitor materials with high energy storage density, high charge and discharge rate, long service life, wide operating temperature range, strong safety, low cost, and simple preparation process has received widespread attention. It can effectively solve the problem of low power density in energy materials, so it has a wide range of development space and application prospects in energy power systems. [0003] Due to the current trend of miniaturization of electronic devices, the requirements for the energy storage density of film capacitor materials are gradually increasing. Traditional flexible polymers have low die...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L27/16C08L29/04C08L33/12C08L29/14C08K9/10C08K3/24
CPCC08J5/18C08J2327/16C08J2329/04C08K3/24C08K9/10C08K2201/003C08K2201/011C08L2203/16C08L2203/20C08L27/16C08L29/04
Inventor 郭宝华戴泽辉徐军
Owner TSINGHUA UNIV
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