Light high-conductivity coating as well as preparation method and application thereof

A high-conductivity, lightweight technology, applied in the direction of conductive coatings, epoxy resin coatings, coatings, etc., can solve problems such as weight increase, coatings that do not meet the minimum requirements for aviation flight, and the impact of composite materials on lightweight effects, etc., to achieve Avoid the peeling effect

Pending Publication Date: 2020-06-05
TAIZHOU TIANSHU NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of metal powder needs to be greater than 50% by volume. In this way, the density of the coating will be as high as about 5g / cm³, which will increase the weight of the aircraft engine.
On the other hand, the lightweight effect of composite materials will be greatly affected
In addition, the high metal powder filling ratio will lead to the damage of the adhesion and mechanical properties of the coating
This may result in a plating that does not meet minimum specification requirements for aerospace flight
Therefore, the existing commercial conductive coatings are not very suitable for aircraft coating

Method used

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  • Light high-conductivity coating as well as preparation method and application thereof
  • Light high-conductivity coating as well as preparation method and application thereof
  • Light high-conductivity coating as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Polyamine surface modification

[0059] 25% chloromethyl styrene and 75% divinylbenzene copolymerized 5-micron microspheres as the starting microspheres (the microspheres are TS005CI microspheres provided by Taizhou Tianshu New Material Technology Co., Ltd., the coefficient of variation of the particle size distribution of the microspheres 2.8%).

[0060] 20 g of TS005CL and 2.5 g of tris(2-aminoethyl)amine were added to a 500 ml round bottom flask containing 250 ml of DMF. Under electromagnetic stirring, the solution was heated to 105° C., and the reaction was continued for 5 hours. After cooling, filter and rinse thoroughly with deionized water. After vacuum drying at 100°C for two hours, polyamine-modified microspheres were obtained. The microspheres are analyzed by infrared spectroscopy, and the benzyl chloride groups on the surface of the microspheres are completely converted into amine groups.

[0061] (2) The surface support of the microspheres is activat...

Embodiment 2

[0073] Other steps are with embodiment 1, difference is:

[0074] (1) Polyamine surface modification

[0075] The 4.5-micron microspheres polymerized with 65% divinylbenzene were used as the starting microspheres (the No. TS0045-Y microspheres were provided by Taizhou Tianshu New Material Technology Co., Ltd., and the coefficient of variation of the particle size distribution of the microspheres was 3.0%).

[0076] Add 50g of TS0045-Y microspheres into a 1000ml round bottom flask containing 500g of acetonitrile, slowly add 3ml of 98% concentrated sulfuric acid dropwise, and stir electromagnetically at room temperature for 5 hours. Then slowly add 10ml of anhydrous polyethyleneimine (PEI) with a molecular weight of 800 dropwise. After the dropwise addition was completed, the temperature was slowly raised to reflux of acetonitrile. Continue to react for three hours. After cooling, filter and rinse thoroughly with deionized water. After vacuum drying at 100°C for two hours, p...

Embodiment 3

[0084] Other steps are with embodiment 1, difference is:

[0085] (1) Polyamine surface modification

[0086] 3.05 micron microspheres copolymerized with 25% maleic anhydride and 75% divinylbenzene as the starting microspheres (No. TS00305-AN microspheres are provided by Taizhou Tianshu New Material Technology Co., Ltd., the coefficient of variation of particle size distribution of microspheres 5.5%).

[0087] Add 50g of TS00305-AN microspheres into a 1000ml round bottom flask containing 500ml of acetonitrile, slowly add 5g of triethylenetetramine dropwise, and slowly raise the temperature to reflux of acetonitrile. Continue to react for three hours. After cooling, filter and rinse thoroughly with deionized water. Dry under vacuum at 100°C for two hours. Then, under nitrogen condition, heat to 205°C for two hours. polyamine-modified microspheres. The microspheres are analyzed by infrared spectroscopy, and the maleic anhydride groups on the surface of the microspheres are...

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Abstract

The present invention relates to the field of polymer materials, particularly to a high conductivity coating material, which comprises conductive microspheres and a polymer binder, the volume ratio ofthe conductive microspheres to the polymer binder is 1: 2-2: 1, and the conductive microspheres are silver-plated or copper-plated conductive microspheres. The density of the carbon fiber reinforcedcomposite material can be furthest close to the density of thehigh conductivity coating material is close to that ofa carbon fiber reinforced composite material as far as possible without increasing the additional weight of a composite material product; and the surface resistivity is as low as 0.01 ohm / m2, and the conductivity is not lower than that of copper powder fillerconductive coating, so that lightning stroke can be prevented, and the interference of static electricity on electromagnetic waves can be eliminated. The high conductivity coating materialcan be used for surface coatings of composite materials on airplanes, high-speed trains, unmanned aerial vehicles, wind driven generator blades and automobiles which are made of the composite materials, and the problem that existing commercial conductive coatings are not very suitable for coatings of the products is effectively solved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a high-conductivity paint that can be used for the surface coating of composite materials on aircraft, high-speed trains, unmanned aerial vehicles, wind turbine blades, and automobiles made of composite materials and its preparation methods and applications. Background technique [0002] Fiber-reinforced composite materials have the advantages of high strength, light weight, corrosion resistance, etc., such as glass fiber, basalt fiber, special polymer fiber, carbon fiber, etc., are widely used in the manufacture of composite materials, and are widely used in aircraft, high-speed trains, automobiles , mechanical structures and other fields. Especially for some weight-sensitive applications, such as aircraft, drones and other aircraft, the light weight of the composite material has a special advantage. For example, the density of carbon fiber reinforced composite (CFRC) is 1.5-1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/24C23C18/20C23C18/28C23C18/30C23C28/02
CPCC09D163/00C09D5/24C23C18/2086C23C18/285C23C18/30C23C18/38C23C18/42C23C18/1651C23C18/1653C23C28/023C25D5/10C08K2003/085C08K2201/001C08L25/02C08K9/12C08K3/08
Inventor 张竟郑国栋郑争
Owner TAIZHOU TIANSHU NEW MATERIAL TECH CO LTD
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