Sic@SiO<2> core-shell-structured nanofiller/epoxy resin-based composite material and preparation method thereof

A nano-filler, core-shell structure technology, applied in plastic/resin/wax insulators, organic insulators, etc., can solve the problems of low breakdown strength of nonlinear insulating materials, and achieve low equipment prices, simple process flow, and excellent nonlinearity. Effects of Conductivity Properties

Inactive Publication Date: 2020-03-31
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of low breakdown strength of nonlinear insulating materials, the present invention provides a SiC@SiO 2 Core-shell structure nano filler / epoxy resin matrix composite material and preparation method thereof

Method used

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  • Sic@SiO&lt;2&gt; core-shell-structured nanofiller/epoxy resin-based composite material and preparation method thereof
  • Sic@SiO&lt;2&gt; core-shell-structured nanofiller/epoxy resin-based composite material and preparation method thereof
  • Sic@SiO&lt;2&gt; core-shell-structured nanofiller/epoxy resin-based composite material and preparation method thereof

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Effect test

Embodiment 1

[0036] A SiC@SiO 2 Core-shell structured nanofiller / epoxy resin matrix composite doped with 5wt.% SiC@SiO 2 core-shell structured nanofillers, the SiC@SiO 2 The core-shell nanofiller uses nano-SiC particles as the core layer, and the core layer is coated with SiO with a thickness of 6nm. 2 Shell.

[0037]The present invention introduces silicon dioxide with excellent insulating performance into the dielectric composite material in order to properly improve the breakdown strength while improving the non-linear conduction characteristic of the dielectric material. Compared with single-component nanofillers, nanofillers with a core-shell structure can better improve amphiphilicity, improve weather resistance, wear resistance, reduce friction, prevent corrosion, and improve stability. There is a synergistic effect between components, which can Endowing materials with two or more properties greatly expands the application range of nanomaterials.

Embodiment 2

[0039] A SiC@SiO 2 Core-shell structured nanofiller / epoxy resin matrix composite doped with 5wt.% SiC@SiO 2 core-shell structured nanofillers, the SiC@SiO 2 The core-shell nanofiller uses nano-SiC particles as the core layer, and the core layer is coated with SiO with a thickness of 6nm. 2 Shell. In this example, SiC@SiO 2 The particle size of the core-shell structure nano filler is 50-75nm.

[0040] SiC@SiO provided by the present invention 2 The particle size of the core-shell nanofiller is 50-75nm. Due to the small particle size of the filler, a certain degree of agglomeration will inevitably occur, but the particle size of the formed particle clusters is all below 1 μm, which is still a nanoscale filler. These The particle clusters can be evenly dispersed in the epoxy resin matrix, which can not only endow the composite material with excellent nonlinear electrical conductivity and breakdown strength, but also ensure the mechanical properties of the composite material,...

Embodiment 3

[0043] A SiC@SiO 2 The preparation method of core-shell structure nano filler / epoxy resin matrix composite material, the steps are as follows:

[0044] Step 1. Preparation of nano-SiC particles:

[0045] Add SiC particles into absolute ethanol according to a certain mass-volume ratio, and obtain nano-SiC particles through ultrasonic dispersion, grinding, and drying. Uniform nano-SiC suspension;

[0046] Step 2. Preparation of SiC@SiO 2 Core-shell nanofiller:

[0047] Add ammonia water to the nano-SiC suspension obtained in step 1 according to a certain volume ratio, stir the obtained nano-SiC reaction system for a certain period of time at the first rotational speed, and place the obtained nano-SiC reaction system under the condition of 60° C. The mixed solution of ethyl silicate and ethanol is continuously stirred at the second speed for a certain period of time, and then the reaction system is left to stand. After standing for a certain period of time, the supernatant is...

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Abstract

The invention relates to a SiC@SiO2 core-shell-structured nanofiller/epoxy resin-based composite material and a preparation method thereof, belonging to the technical field of high-voltage dielectricinsulating materials. To overcome the problem that a nonlinear insulating material is low in breakdown strength, the invention provides the SiC@SiO2 core-shell-structured nanofiller/epoxy resin-basedcomposite material. The material is doped with 5 wt% of a SiC@SiO2 core-shell-structured nanofiller, wherein the nanofiller uses nanometer SiC particles as a core layer, and the core layer is coated with a SiO2 shell layer with a thickness of 6 nm. According to the invention, the epoxy resin composite material obtained after doping of the core-shell-structured inorganic nanofiller with a low filling amount still has excellent nonlinear conductivity along with the rise of temperature; and moreover, the breakdown strength of the epoxy resin is remarkably improved, so the composite material can work safely under severe conditions, and has wide application prospects in the technical field of high-voltage dielectric insulating materials.

Description

technical field [0001] The invention belongs to the technical field of high-voltage dielectric insulating materials, and in particular relates to a SiC@SiO 2 Core-shell structure nano filler / epoxy resin matrix composite material and preparation method thereof. Background technique [0002] Nonlinear insulating dielectric refers to the insulating dielectric whose conductivity or relative permittivity changes with the change of electric field. For example, common inorganic non-metallic non-linear resistance materials. This kind of material can homogenize the non-uniform electric field by itself, and can suppress the generation and growth of space charges and electric trees, which can greatly improve the insulating performance of the structure. The requirements for insulating materials in modern power construction are constantly increasing, and the environment in which high-voltage electrical equipment is located is complex. With the increase of voltage levels, higher require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/10C08K3/34H01B3/40
CPCC08K3/34C08K9/10C08K2201/011C08L2201/08H01B3/40C08L63/00
Inventor 迟庆国崔爽张天栋张月张永泉张昌海
Owner HARBIN UNIV OF SCI & TECH
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