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Laminated-structure polymer-based dielectric energy-storage composite material and preparation method thereof

A composite material and polymer technology, applied in the field of polymer-based dielectric energy storage composite materials and their preparation, can solve problems such as reducing the breakdown field strength of polymers, and achieve improved electrical polarization characteristics, enhanced voltage resistance, high The effect of dielectric constant

Active Publication Date: 2014-09-17
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Filling with inorganic materials is often easier to obtain a higher dielectric constant, but it will reduce the breakdown field strength of the polymer. Therefore, how to improve the dielectric constant and breakdown field strength at the same time is the current research topic main problems faced

Method used

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  • Laminated-structure polymer-based dielectric energy-storage composite material and preparation method thereof
  • Laminated-structure polymer-based dielectric energy-storage composite material and preparation method thereof
  • Laminated-structure polymer-based dielectric energy-storage composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1, preparation laminated structure polymer matrix composite material

[0062] Weigh barium acetate (BaAc 2 ) 1.28g, strontium acetate (SrAc 2 0.5H 2 O) 1.07g, bismuth acetate (BiAc 3 )0.39g, tetrabutyl titanate ((C 4 h 9 O) 4 Ti) 3.91g, acetylacetone 2.00g were sequentially added to 9ml glacial acetic acid and stirred evenly, then 0.40g PVP (number average molecular weight 1.3 million) was added and stirred for 3h to form a stable sol, the sol was moved into a syringe for electrospinning, the voltage was 15kV, and the The distance between the device and the needle is 10cm. The collected precursor fibers were calcined at 700° C. for 3 h to obtain 2.2 g of strontium barium titanate (BSBT) nanofibers (with a diameter of 200-300 nm and a fiber length of 10-30 mm). Take 0.026g of BSBT nanofibers and place them in 10mL of 0.01mol / L dopamine aqueous solution, stir in a water bath at 60°C for 10h, centrifuge, wash with ethanol, and dry to obtain dopamine-coate...

Embodiment 2

[0067] Embodiment 2, preparation laminated structure polymer matrix composite material

[0068] Weigh barium acetate (BaAc 2 ) 1.28g, strontium acetate (SrAc 2 0.5H 2 O) 1.07g, bismuth acetate (BiAc 3 )0.39g, tetrabutyl titanate ((C 4 h 9 O) 4 Ti) 3.91g, acetylacetone 2.00g were sequentially added to 9ml glacial acetic acid and stirred evenly, then 0.40g PVP (number average molecular weight 1.3 million) was added and stirred for 3h to form a stable sol, the sol was moved into a syringe for electrospinning, the voltage was 15kV, and the The distance between the device and the needle is 10cm. The collected precursor fibers were calcined at 700° C. for 3 h to obtain 2.2 g of strontium barium titanate (BSBT) nanofibers (with a diameter of 200-300 nm and a fiber length of 10-30 mm). Take 0.026g BSBT nanofibers, add 10mL DMF solvent to it, sonicate for 1h, then add 1g PVDF (number average molecular weight 100,000), stir for 24h until uniformly mixed, pour the mixture into a cas...

Embodiment 3

[0071] Embodiment 3, preparation laminated structure polymer matrix composite material

[0072] Weigh 1.53g of barium acetate, 1.86g of strontium acetate, 3.40g of tetrabutyl titanate, and 1.80g of acetylacetone in 7ml of glacial acetic acid and stir evenly, then add 0.40g of PVP (number average molecular weight 1.3 million) and stir for 3 hours to form a stable Sol, move the sol into a syringe for electrospinning, the voltage is 14kV, and the distance between the receiver and the needle is 10cm. The collected precursor fibers were calcined at 650° C. for 3 h to obtain 2.5 g of barium strontium titanate (BST) nanofibers (with a diameter of 200-300 nm and a fiber length of 10-50 mm). Take 0.29g of BST nanofibers and place them in 20mL of 0.01mol / L dopamine aqueous solution, stir in a water bath at 60°C for 10h, centrifuge, wash with ethanol, and dry to obtain dopamine-coated barium strontium titanate nanofibers (BSTDopa). Add 10mL of DMF solvent, ultrasonic for 1h, then add 1g...

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Abstract

The invention discloses a laminated-structure polymer-based dielectric energy-storage composite material and a preparation method thereof. The composite material is a laminated thin film having at least three thin film layer structures. The laminated thin film is formed by a composite membrane, composed of nanometer fibers and a polymer, and a composite membrane, composed of nanometer particles and a polymer, in an alternately laminated manner. According to the invention, a tape casting method is employed for manufacturing a single-layer composite thin film and then a laminated hot-pressing method is employed for manufacturing the laminated composite material, or a multistage tape casting method is employed for flowing out multiple thin film layers successively to obtain a laminated structure. An experimental result proves that the laminated composite material has a relative high dielectric constant, a relative low dielectric loss, relative high breakdown field intensity and a relative high energy-storage density. The laminated composite material is expected for being applied in an embedded capacitor, a static accumulator, a large-power capacitor and the like.

Description

technical field [0001] The invention relates to a polymer-based dielectric energy storage composite material filled with laminated structure inorganic medium and a preparation method thereof. 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 inside the printed circuit board for packaging, is the key to realizing the miniaturization, light weight and thinning of electronic devices. Embedded packaging requires the use of embedded capacitors, which must have a high dielectric constant and good compatibility with the organic materials used in printed circuit boards. The currently used surface moun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06C08L27/16C08L63/00C08L23/12C08L67/00C08L79/08C08K9/10C08K7/08C08K3/24C08K3/22B32B37/06B32B37/10C08J5/18D01F9/08C04B35/468
Inventor 胡澎浩南策文沈洋宋宇林元华
Owner TSINGHUA UNIV
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