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A kind of high energy storage density polymer-based nanocomposite material and its preparation method

A technology of nanocomposite materials and high energy storage density, which is applied in the field of energy storage density of polypropylene-based nanocomposite materials, can solve complex and cumbersome chemical modifications, increase the dielectric loss of the system, and be unfavorable for large-scale production, etc., and achieve improved breakdown The effect of strength, breakdown strength increase and energy storage density increase

Active Publication Date: 2021-06-29
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned methods not only involve complex and cumbersome chemical modification and post-treatment processes, which are not conducive to large-scale production, but also increase the dielectric loss of the system due to the introduction of small molecules or more space charges into the system, resulting in shock. Risk of loss of wear strength

Method used

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  • A kind of high energy storage density polymer-based nanocomposite material and its preparation method
  • A kind of high energy storage density polymer-based nanocomposite material and its preparation method
  • A kind of high energy storage density polymer-based nanocomposite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] First add h-BN and oMMT nanofillers at a ratio of 1:1 to the polypropylene resin and pre-mix in a high-speed mixer to obtain a masterbatch with a filler volume fraction of 30vol%, and then mix the masterbatch with the polypropylene resin according to the obtained The composite material contains 5 vol% nano fillers and is pre-mixed, then put into a twin-screw extruder, melt blending, extrude and granulate at a screw speed of 400 rpm. The h-BN used therein has a lateral average size of 200 nm, and the oMMT has a lateral average size of 5 μm.

Embodiment 2

[0039] First add h-BN and oMMT nanofillers at a ratio of 1:1 to the polypropylene resin and pre-mix in a high-speed mixer to obtain a masterbatch with a filler volume fraction of 30vol%, and then mix the masterbatch with the polypropylene resin according to the obtained The composite material contains nanometer fillers with a volume fraction of 5 vol% and is pre-mixed, put into a twin-screw extruder, and melted, blended, extruded and granulated at a screw speed of 500 rpm. The h-BN used therein has a lateral average size of 200 nm, and the oMMT has a lateral average size of 5 μm.

Embodiment 3

[0041] First add h-BN and oMMT nanofillers at a ratio of 1:1 to the polypropylene resin and pre-mix in a high-speed mixer to obtain a masterbatch with a filler volume fraction of 30vol%, and then mix the masterbatch with the polypropylene resin according to the obtained The composite material contains nanometer fillers with a volume fraction of 5 vol% and is pre-mixed, put into a twin-screw extruder, and melted, blended, extruded and granulated at a screw speed of 600 rpm. The h-BN used therein has a lateral average size of 200 nm, and the oMMT has a lateral average size of 5 μm.

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Abstract

The invention discloses a high-energy-storage-density polymer-based nanocomposite material and a preparation method thereof. The method is to premix the polymer base material with a two-dimensional hybrid filler to prepare a masterbatch, and then mix the masterbatch with a polymer The base material is pre-mixed according to the two-dimensional hybrid filler containing at least 5vol% in the material, and melted, blended, extruded and granulated at a screw speed of 400-1000rpm, wherein the size of one or two two-dimensional hybrid fillers is at least The difference is 4 times. Compared with the pure polypropylene base material, the energy storage density of the obtained composite material can be increased by at least 23.4%, and compared with the pure high-density polyethylene base material, the energy storage density can be increased by at least 77.1%. The energy density can be increased by at least 69.4%. Since the addition of two sizes of two-dimensional nanofillers can make the formed barrier network more dense and high-speed extrusion can make the filler dispersion more uniform, it not only improves the breakdown strength and energy storage density of the obtained composite material, but also simplifies the process and Green.

Description

technical field [0001] The invention belongs to the technical field of polymer dielectric composite materials and their preparation, and in particular relates to a method for increasing the energy storage density of polypropylene-based nanocomposite materials by filling fillers and high-shear extrusion. This method can not only prepare a composite material with high energy storage density and low dielectric loss, but also simplify the steps of industrial production. Background technique [0002] Capacitors are a type of passive electronic components that use electrostatic fields to store energy. They have very broad market prospects in the growing electronic consumer market, and have gradually become an indispensable research content in the development of energy storage technology. Compared with lithium-ion batteries, fuel cells, pseudocapacitors, and internal combustion engines, dielectric capacitors because of their extremely fast charge and discharge rates (within 10 -6 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/06C08L27/16C08K3/38C08K3/34C08K3/22
CPCC08K2003/2244C08K2003/385C08K2201/003C08K2201/011C08L23/06C08L23/12C08L27/16C08L2205/025C08L2207/062C08K3/38C08K3/346C08K3/22
Inventor 傅强刘丁侥张琴陈枫李永鸿钟秀珍
Owner SICHUAN UNIV