Graphene/cyanate composite material and preparation method and application thereof

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...

Examples

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 ...

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...

Examples

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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