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Boron nitride heterogeneous filler and preparation method thereof, and fiber-reinforced epoxy resin heat-conducting composite material, preparation method and application thereof

A heat-conducting composite material and epoxy resin technology, applied in the field of composite materials, can solve problems such as restricting the application range of fiber-reinforced epoxy resin composite materials and limited thermal conductivity of composite materials.

Active Publication Date: 2021-06-01
HUNAN KOSEN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the existing heterostructure fillers have a "point-surface" structure, which limits the thermal conductivity of composite materials and restricts the application range of fiber-reinforced epoxy resin composites.

Method used

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  • Boron nitride heterogeneous filler and preparation method thereof, and fiber-reinforced epoxy resin heat-conducting composite material, preparation method and application thereof
  • Boron nitride heterogeneous filler and preparation method thereof, and fiber-reinforced epoxy resin heat-conducting composite material, preparation method and application thereof
  • Boron nitride heterogeneous filler and preparation method thereof, and fiber-reinforced epoxy resin heat-conducting composite material, preparation method and application thereof

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preparation example Construction

[0056] In the present invention, the preparation method of the modified spherical micron boron nitride or modified boron nitride nanosheets preferably includes the following steps:

[0057] Boron nitride is mixed with an aqueous polymer electrolyte solution for coating reaction;

[0058] The boron nitride is spherical micron boron nitride or boron nitride nanosheets, and the polymer electrolyte is polyanion electrolyte or polycation electrolyte.

[0059] In the present invention, when the modified spherical micron boron nitride is positively charged and the modified boron nitride nanosheet is negatively charged; the preparation method of the positively charged modified spherical micron boron nitride preferably comprises the following steps: The micron boron nitride is mixed with the polycation electrolyte aqueous solution, and the first coating reaction is carried out to obtain the positively charged modified spherical micron boron nitride. In the present invention, the mass ...

Embodiment 1

[0126] Mix 10 g of spherical micron boron nitride with an average particle size of 30 μm and 500 g of a polydiallyldimethylammonium chloride aqueous solution with a mass concentration of 1.5 wt %, carry out coating reaction at 30° C. for 48 h, and then suction filter (using Washing with deionized water), and drying the filter residue obtained by suction filtration at 55° C. for 12 hours to obtain positively charged modified spherical micron boron nitride;

[0127] 21g of boron nitride nanosheets with an average diameter of 120nm and an average thickness of 20nm and 1400g of a mass concentration of 1.4wt% sodium polyacrylate aqueous solution were mixed, and the coating reaction was carried out at 30°C for 48h, followed by suction filtration (using deionized water to carry out washing), drying the filter residue obtained by suction filtration at 55° C. for 12 hours to obtain negatively charged modified boron nitride nanosheets;

[0128] Sonicate 10 g of modified spherical micron...

Embodiment 2

[0132] 6g of spherical micron boron nitride with an average particle diameter of 30 μm and 320 g of a polydiallyldimethylammonium chloride aqueous solution with a mass concentration of 1.7 wt % were mixed, and the coating reaction was carried out at 32° C. for 47 h, followed by suction filtration (using Washing with deionized water), and drying the filter residue obtained by suction filtration at 57° C. for 12 hours to obtain positively charged modified spherical micron boron nitride;

[0133] 14g of boron nitride nanosheets with an average diameter of 120nm and an average thickness of 20nm and 1000g of a mass concentration of 1.6wt% sodium polyacrylate solution were mixed, and the coating reaction was carried out at 32°C for 47h, followed by suction filtration (using deionized water to carry out washing), drying the filter residue obtained by suction filtration at 56° C. for 12 hours to obtain negatively charged modified boron nitride nanosheets;

[0134] Sonicate 6 g of modi...

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Abstract

The invention belongs to the technical field of composite materials, particularly relates to a boron nitride heterogeneous filler and a preparation method thereof, and a fiber-reinforced epoxy resin heat-conducting composite material, a preparation method and application thereof, and provides a boron nitride heterogeneous filler, which comprises modified spherical micron boron nitride and modified boron nitride nanosheets, wherein the modified spherical micron boron nitride and the modified boron nitride nanosheet have different charges, and the modified boron nitride nanosheet is electrostatically adsorbed on the surface of the modified spherical micron boron nitride. According to the invention, the boron nitride heterostructure provided by the invention is used as a heat-conducting filler, the modified glass cloth is used as a reinforcing material, and the epoxy resin is used as a matrix to prepare the epoxy resin heat-conducting composite material, so that the heat-conducting property, the electrical insulation property and the mechanical property of the epoxy resin heat-conducting composite material are further improved under the condition of lower filler consumption.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a boron nitride heterogeneous filler and a preparation method thereof, a fiber-reinforced epoxy resin heat-conducting composite material, a preparation method and application thereof. Background technique [0002] Fiber-reinforced epoxy resin composite materials are often used in large-scale generator insulation tanks, UHV converter valves and reactors due to their advantages of high strength, good electrical insulation, easy molding and processing, excellent chemical stability and low cost. . However, with the development of high-power and high-integration electronic equipment, the thermal conductivity of fiber-reinforced epoxy resin composites cannot meet the requirements of use, which severely limits the application value of fiber-reinforced epoxy resin composites in conductive / heat-dissipating materials. [0003] Researchers have improved the thermal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K7/18C08K7/00C08L63/00C08K9/02C08K7/14C08J5/08C09K5/14
CPCC08K9/10C08K7/18C08K7/00C08J5/08C09K5/14C08K2201/011C08J2363/00C08K9/02C08K7/14
Inventor 顾军渭张睿涵郑保昌郭永强钟雪琴欧阳光华
Owner HUNAN KOSEN NEW MATERIAL
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