Method for large-scale preparation of graphene through ultrasonic stripping and application of graphene
An ultrasonic exfoliation and graphene technology, applied in the field of functional materials and nanomaterials, can solve the problems of low efficiency, increased product area, and high cost, and achieve the effect of continuous preparation process, continuous ultrasonic cavitation, and easy operation and control.
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Embodiment 1
[0028] A. Weigh natural graphite powder and sodium lauryl sulfate, the weight ratio is 1:5, and put them into the feeder;
[0029] B. Start the tubular reactor, and pump the argon gas flow into the tubular reactor through the high-pressure pump. The pressure in the high-pressure section of the tubular reactor reaches 10MPa, the pressure in the low-pressure section reaches 1MPa, and the compressed gas flow velocity in the high-pressure zone is controlled to 100m / s, turn on the ultrasonic and control the power at 1KW.
[0030] C. The graphite powder in the feeder is driven by the gas flow and enters the high-pressure section of the tubular reactor. The argon gas enters the graphite interstitial space and is adsorbed on the graphene surface in situ. At the same time, cavitation is generated under the action of the ultrasonic horn, which reduces The force between graphite layers. The graphite powder then enters the low-pressure section of the tubular reactor, and the high-pressure ga...
Embodiment 2
[0034] A. Weigh expanded graphite and sodium dodecylbenzene sulfonate, with a weight ratio of 1:5, and put them in the feeder;
[0035] B. Start the tubular reactor, and pump the nitrogen gas flow into the tubular reactor through the high-pressure pump. The pressure in the high-pressure section of the tubular reactor reaches 11MPa, the pressure in the low-pressure section reaches 1MPa, and the compressed air velocity in the high-pressure zone is controlled to 80m / s , Turn on the ultrasonic and control the power at 5KW.
[0036] C. The graphite powder in the feeder is driven by the gas flow and enters the high-pressure section of the tubular reactor. Nitrogen gas enters the graphite interstitial space and is adsorbed on the graphene surface in situ. At the same time, cavitation is generated under the action of the ultrasonic horn to reduce graphite. The force between the layers. The graphite powder then enters the low-pressure section of the tubular reactor, and the high-pressure g...
Embodiment 3
[0040] A. Weigh natural graphite powder and alkylphenol polyoxyethylene ether with a weight ratio of 1:5 and put them into the feeder;
[0041] B. Start the tubular reactor, and pump the carbon dioxide gas flow into the tubular reactor through the high-pressure pump. The pressure in the high-pressure section of the tubular reactor reaches 12MPa, the pressure in the low-pressure section reaches 0.5MPa, and the compressed air flow velocity in the high-pressure zone is controlled to 60m / s, turn on the ultrasonic and control the power at 15KW.
[0042] C. The graphite powder in the feeder is driven by the gas flow and enters the high-pressure section of the tubular reactor. The carbon dioxide gas enters the graphite interstitial space and is adsorbed on the graphene surface in situ. At the same time, cavitation is generated under the action of the ultrasonic horn to reduce graphite The force between the layers. The graphite powder then enters the low-pressure section of the tubular r...
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