A New Dielectric Composite Material

A composite material and dielectric technology, applied in the field of new dielectric composite materials, can solve problems such as inhomogeneity and inconsistency, harsh process conditions, and damage to the structure of composite materials, so as to solve the problem of dispersion, high energy storage density, The effect of efficient arrangement

Active Publication Date: 2020-09-22
云帆新材料集团有限公司
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  • Description
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AI Technical Summary

Problems solved by technology

The main disadvantage of the biaxial stretching method is: the inhomogeneity and inconsistency inside the composite material lead to different deformations of the composite material under the same stretching force, so that the change of the arrangement direction of the internal nanowires cannot be consistent. At the same time, Biaxial stretching is easy to destroy the internal structure of the composite material, seriously affecting the performance of the composite
The tape-casting process is very rough, and the nanowires are oriented by the shear force of the scraping plate. This shear force has a small effect and the force is different in the thickness direction of the fluid, so the effect of the orientation of the nanowires is not obvious. In addition, the parameters of the casting process, such as speed and force, cannot be accurate, resulting in inconsistent repeatability of each experiment
The preparation of nanowire arrays by hydrothermal method has harsh process conditions and high cost, and only small samples can be prepared

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0050] Example: This scheme prepares BaTiO 3 / P(VDF-CTFE) composite material

[0051] 1. In situ modification of BaTiO in step 1 3 The scheme of the nanowires is the same as that of the comparative example. Compared with the comparative example, this example adopts 3D direct writing technology to prepare the composite film, and the specific steps are as follows:

[0052] Weigh 0.0635g, 0.0866g, 0.177g, 0.274gPTFMPCS modified BaTiO 3 The nanowires were added to 12.5g of DMF solvent (the volume ratios of nanowires in the composite material were 1.5%, 2.5%, 5% and 7.5% respectively), ultrasonically dispersed for 10min, then 1.2gP(VDF-CTFE) resin was added, ultrasonically After the dispersion, ball milled for two days to obtain a uniformly dispersed suspension slurry, which is used as each group of examples.

[0053] Transfer the slurry of each embodiment to the barrel, connect the air compressor to adjust the pressure, so that the slurry extrusion device installed on the Z ax...

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Abstract

The invention belongs to the field of dielectric composite materials, in particular relates to a novel dielectric composite material. The novel dielectric composite material is characterized in that the dielectric composite material is a ceramic nanowire / polymer composite material. In the dielectric composite material, the ceramic nanowire accounts for 1 to 10 percent by volume, and the polymer accounts for 90 to 99 percent by volume; and the ceramic nanowires are in ordered arrangement in the dielectric composite material in any direction. By adopting a 3D printing technology, the ceramic nanowires in the slurry can be directionally arranged, and the distribution direction of the nanowires can be controlled, so that the performance of the composite material can be effectively improved.

Description

technical field [0001] The invention belongs to the field of dielectric composite materials, and in particular relates to a new dielectric composite material. Background technique [0002] In recent years, in order to alleviate the environmental pollution and energy shortage caused by fossil energy, renewable energy technologies such as solar cells, lithium batteries and capacitors have developed rapidly. Among them, capacitors have faster charging and discharging speeds than lithium batteries and other energy storage devices. Fast, good stability and low cost advantages, suitable for high-power electronic equipment. However, current high-power capacitors generally have the defect of low energy density. Therefore, how to increase the energy density of capacitors is the bottleneck of research in this field. [0003] To increase the energy density of dielectric materials, it is necessary to increase its relative permittivity and anti-breakdown electric field value. Ferroele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08K9/04C08K7/00C08K3/24B33Y70/10
CPCB33Y70/00C08K3/24C08K7/00C08K9/08C08K2201/011C08L27/16
Inventor 罗行张斗陈盛周科朝
Owner 云帆新材料集团有限公司
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