Polymer-based dielectric energy storage composite film material with core-shell structure and preparation method

A technology of composite thin film and shell structure, which is applied in the field of polymer-based dielectric energy storage composite thin film materials and preparation, can solve problems that need to be developed, and achieve the goal of reducing interface polarization, alleviating uneven electric field distribution, and high dielectric constant. Effect

Active Publication Date: 2016-02-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still few studies on this inorganic core-shell nanoparticle-filled dielectric composite film, and an efficient and simple method for preparing inorganic core-shell nanoparticles remains to be developed.

Method used

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  • Polymer-based dielectric energy storage composite film material with core-shell structure and preparation method
  • Polymer-based dielectric energy storage composite film material with core-shell structure and preparation method
  • Polymer-based dielectric energy storage composite film material with core-shell structure and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0067] Weigh 3gBaTiO 3 Put it into a three-necked flask, add 70ml of hydrogen peroxide, and reflux with magnetic stirring at 106°C for 8h. Centrifugal washing, drying, and grinding to obtain hydroxylated barium titanate (BaTiO 3 -OH); Weigh 1gBaTiO 3 -OH, dissolve in 200ml of ethanol, add 0.01g of PVP, stir for 3h while ultrasonic, add 4.5ml of ammonia water, adjust the pH to 8~9; take 1ml of tetraethyl orthosilicate and dissolve in 6ml of ethanol, add a few drops of acetic acid , the dissolved solution was added dropwise to BaTiO 3 -PVP solution, stirred for 3 hours while ultrasonic, centrifuged, washed, dried and ground. The obtained particles were calcined at 600 °C for 2 h to obtain surface-coated silica (SiO 2 ) shell filler. Weigh 0.0937g of nanoparticles and place them in DMF, an organic solvent, and disperse them with ultrasonic vibration until the nanofillers form a stable suspension in the solvent; add 0.5g to the suspension and stir to dissolve it completely; ...

Embodiment 2

[0069] Weigh 3gBaTiO 3 Put it into a three-necked flask, add 70ml of hydrogen peroxide, and reflux with magnetic stirring at 106°C for 8h. Centrifugal washing, drying, and grinding to obtain hydroxylated barium titanate (BaTiO 3 -OH); Weigh 1gBaTiO 3 -OH, add 80ml of isopropanol as a solvent, ultrasonication for 1h, drop 2~5 drops of TC-2 after the filler is evenly dispersed, and magnetically stir and reflux at 120°C for 4h to obtain BaTiO with TC-2 attached to the surface 3 (BT-TC-2) Weigh 0.4725g of Ba(OH) 2 and 0.397g of Sr(OH) 2 , solvent isopropanol, drop a few drops of acetic acid, ultrasonically dissolve, the dissolved Ba(OH) 2 and Sr(OH) 2 Add the solution dropwise into the BT-TC-2 solution, stir it magnetically for 0.5h, then add 0.0015mol / L tetra-n-butyl titanate solution dropwise to the solution; then add sodium hydroxide solution dropwise to adjust the pH to 9.8, Magnetically stirred and refluxed at 120°C for 24h, centrifuged, washed, and dried; the prepared ...

Embodiment 3

[0071] Weigh 3gBaTiO 3 Put it into a three-necked flask, add 70ml of hydrogen peroxide, and reflux with magnetic stirring at 106°C for 8h. Centrifugal washing, drying, and grinding to obtain hydroxylated barium titanate (BaTiO 3 -OH); weigh 1g of BaTiO 3 -OH, dissolved in 80ml of isopropanol, stirred with ultrasound for 30min to promote its dissolution, added dropwise an appropriate amount of TC-2, magnetically stirred at 70°C for 2h, centrifuged, and dried; the obtained nanoparticles were calcined at 600°C for 2h , to obtain surface-coated TiO 2 Shell BaTiO 3 (BTTO); Weigh 1gBTTO, put it into 80ml of isopropanol and ultrasonically stir for 30min, then add an appropriate amount of TC-2 dropwise, and stir magnetically at 70°C for 2h to obtain surface-modified BTTO-TC-2; weigh 0.0937gBTTO-TC -2 Nanoparticles are placed in an organic solvent (such as DMF), and dispersed by ultrasonic vibration until the nanofiller forms a stable suspension in the solvent; add 0.5g to the abov...

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Abstract

The invention provides a polymer-based dielectric energy storage composite film material with a core-shell structure and a preparation method. The composite film material is prepared from, by mass, 10%-50% of nanometer filler with a core-shell structure, 50%-90% of polymer matrix and 0-10% of combination layer, and the nanometer filler with the core-shell structure is evenly dispersed in the polymer matrix. According to the preparation method, inorganic nanometer particles with the core-shell structure are prepared by adopting a wet chemistry method, the composite film is prepared through a flow casting method, and the prepared composite film has good dielectric property, high breakdown field strength and high energy storage density. By adjusting the thickness of the surface shell of the inorganic nanometer filler with the core-shell structure, the dielectric constant of the composite film can reach about 30, the dielectric loss is kept to below 5 percent, the breakdown field strength can reach 350 kV/mm, and the energy storage density ranges from 5 kJ/L to 10 kJ/L.

Description

technical field [0001] The invention belongs to the technical field of preparation of electronic composite materials and electrostatic energy storage materials, and relates to a core-shell structure polymer-based dielectric energy storage composite film material and a preparation method of a polymer-based composite film using core-shell structure nanoparticles as fillers , the composite material has the characteristics of flexibility, high dielectric constant, low dielectric loss, high breakdown field strength, and high energy storage density. Background technique [0002] Dielectrics can be used to make capacitors, inductors, filters, etc., and are widely used in electronic circuits as the main passive components. At present, in the microelectronics industry, more than 98% of passive components such as capacitors and inductors use discrete components, and they occupy more than 70% of the circuit board space. Embedded packaging technology, which embeds discrete components...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08L63/00C08L27/12C08L23/12C08L67/02C08L79/08C08K9/10C08K9/02C08K3/22C08J5/18
Inventor 胡澎浩王鹏贾竹叶林祥
Owner UNIV OF SCI & TECH BEIJING
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