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Graphene/cyanate composite material and preparation method and application thereof

A composite material and graphene technology, applied in the field of materials, can solve problems such as damage to graphene structure, decrease in electrical conductivity and thermal conductivity, and achieve the effects of reducing costs, reducing thermal expansion coefficient, and excellent mechanical properties.

Active Publication Date: 2017-06-27
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above documents, graphene oxide is used as raw material, and the compatibility between graphene oxide and cyanate ester is improved by grafting method, and the mechanical properties are improved, but the structure of graphene is destroyed, so that the electrical and thermal conductivity will inevitably decrease.

Method used

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  • Graphene/cyanate composite material and preparation method and application thereof
  • Graphene/cyanate composite material and preparation method and application thereof
  • Graphene/cyanate composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) According to the mass ratio of graphene: graphene microchips: π-π conjugated small molecules: deionized water = 0.5:10:0.5:89, after mixing, use a high-speed mixer and a three-roll mill for pre-dispersion ; Among them π-π conjugated small molecule is 1-pyridine acid succinimidyl ester;

[0045] (2) Place the pre-dispersed aqueous solution in an ice bath environment, use an ultrasonic cell pulverizer to disperse again, use the ultrasonic cell pulverizer to sonicate for 30 minutes at a power of 800W, and then place the obtained dispersion in liquid nitrogen. Cool down quickly, and place it in a freeze dryer after being completely frozen to remove the water to obtain foamed pre-dispersed graphene-graphene microchips;

[0046] (3) Mix the foamed pre-dispersed graphene-graphene microchips with the cyanate ester resin, and then disperse the graphene-graphene microchips in the cyanate ester resin through high-speed stirring and three-roll milling. The mass percentage of pre-di...

Embodiment 2

[0049] (1) Formulated according to the mass ratio of graphene: graphene microchips: π-π conjugated small molecules: deionized water = 1:9:0.5:89.5, after mixing, use a high-speed mixer and a three-roll mill for pre-dispersion ; Among them π-π conjugated small molecule is 1-pyridine acid succinimidyl ester;

[0050] (2) Place the pre-dispersed aqueous solution in an ice bath environment, use an ultrasonic cell pulverizer to disperse again, use the ultrasonic cell pulverizer to sonicate at a power of 500W for 25 minutes, and then place the obtained dispersion in liquid nitrogen. Cool down quickly, and place it in a freeze dryer after being completely frozen to remove the water to obtain foamed pre-dispersed graphene-graphene microchips;

[0051] (3) Mix the foamed pre-dispersed graphene-graphene microchips with the cyanate ester resin, and then disperse the graphene-graphene microchips in the cyanate ester resin through high-speed stirring and three-roll milling. The mass percentage...

Embodiment 3

[0054] (1) According to the mass ratio of graphene: graphene microchips: π-π conjugated small molecules: deionized water = 5:10:1:84, after mixing, use a high-speed mixer and a three-roll mill for pre-dispersion ; Among them π-π conjugated small molecule is 1-pyridine acid succinimidyl ester;

[0055] (2) Place the pre-dispersed aqueous solution in an ice bath environment, use an ultrasonic cell pulverizer to disperse again, use the ultrasonic cell pulverizer to sonicate 40 minutes at a power of 400W, and then place the obtained dispersion in liquid nitrogen. Cool down quickly, and place it in a freeze dryer after being completely frozen to remove the water to obtain foamed pre-dispersed graphene-graphene microchips;

[0056] (3) Mix the foamed pre-dispersed graphene-graphene microchips with the cyanate ester resin, and then disperse the graphene-graphene microchips in the cyanate ester resin through high-speed stirring and three-roll milling. The mass percentage of pre-dispersed ...

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Abstract

The invention relates to a graphene / cyanate composite material and a preparation method and application thereof. The preparation method includes: mixing the graphene, graphene nanoplatelets and pi-pi small conjugate molecules with deionized water prior to performing primary dispersion; pouring a water solution to an ice bath cooled ultrasonic cell disruptor, pouring obtained dispersion liquid in liquid nitrogen for quick cooling, placing the mixture in a freeze dryer after complete freezing, and dewatering to obtain the foamed and pre-dispersed graphene / graphene nanoplatelets; finally, mixing the foamed graphene-graphene nanoplatelets with cyanate ester resin to obtain the graphene / cyanate composite material through stirring, grinding and stripping. The graphene / graphene nanoplatelets are well dispersed in the cyanate ester resin, conductivity, thermal conductivity and mechanical property are improved under low content and low viscosity, thermal expansion coefficient is lowered, and the graphene / cyanate composite material can be applied to composite components of electricity conductivity, thermal conductivity and low thermal expansion coefficient structure of space vehicles.

Description

Technical field [0001] The invention belongs to the field of materials, and specifically relates to a graphene / cyanate ester composite material and a preparation method and application thereof, in particular to a graphene / cyanate ester composite material with electrical conductivity, heat conduction, and low thermal expansion coefficient and a preparation method thereof And uses. Background technique [0002] At present, the structure of spacecraft such as satellites has to withstand the radiation of the sun, the earth and other celestial bodies and the alternating heating and cooling of the low temperature in space for a long time, which will cause dramatic changes in the high and low temperatures inside the structure, and the range of changes can reach -200℃~200℃. For large-scale satellite-borne deployable antennas, due to their large size and structural flexibility, they are highly sensitive to heat and have poor thermal stability. The main adverse effects are: 1) Non-uniform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08L63/00C08L79/08C08K3/04C08K7/00
CPCC08K2201/001C08K2201/003C08L79/04C08L2205/02C08L2205/03C08L63/00C08L79/085C08K3/04C08K7/00
Inventor 高锋白刚肖伟田焱张晖张忠史文华张海华
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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