Using Ultrasound To Produce Graphene

Graphene is a new material in which carbon atoms connected by sp hybridization are closely packed into a single-layer two-dimensional honeycomb lattice structure. It has excellent optical, electrical and mechanical properties. It has important application prospects in medicine and drug delivery. The use of ultrasonic technology can greatly improve the exfoliation of graphene, which is an important link in the preparation and application of graphene.

The principle of ultrasonic preparation of graphene:

Convert electrical energy into sound energy through a transducer, and this energy passes through the liquid medium and becomes dense small bubbles. These small bubbles quickly crack and generate energy like small bullets, thereby breaking cells and other substances. effect. ?Ultrasonic is a kind of elastic mechanical wave in the material medium, it is a wave form, so it can be used to detect the physiological and pathological information of the human body, that is, diagnostic ultrasound. It is also a form of energy. When a certain dose of ultrasound propagates in the body, through the interaction between them, it can cause changes in the function and structure of the organism, that is, the ultrasonic biological effect. The effects of ultrasound on cells mainly include thermal effects, cavitation effects and mechanical effects.

The process of preparing graphene by ultrasonic graphene production equipment:

1. Assemble the ultrasonic drive power supply, the reactor body, the ultrasonic vibrator, the material inlet and the material pump.

2. Connect the cooling circulating water inlet to the external water source, the cooling circulating water outlet to the external water outlet pipe, and close the material flow control valve, feed control valve, discharge control valve and sampling port control valve.

3. Using graphite as raw material, using pre-intercalation to obtain expanded graphite with a low degree of oxidation, and adding it to some organic solvent or water to form a graphene pretreatment solution.

4. With the help of ultrasonic waves, heating or airflow, a well-dispersed graphene dispersion can be obtained.

5. The dispersion is then separated by a centrifuge or subjected to pressure filtration by a filter press to obtain graphene micro-sheets.

When the graphene and the organic solvent surface are matched, their interaction can balance the energy required to exfoliate the graphene flakes, and then processed by the ultrasonic graphene preparation equipment. Increasing the sonication time can well improve the graphene yield.