Explosion-proof Ultrasonic homogenizer 20 Khz 3000w With Titanium Probe

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Description

Since the special properties of graphite are known, several methods of graphite preparation have been developed. Graphene is prepared from graphene oxide by a complex chemical process, during which very strong oxidizing and reducing agents are added, and graphene prepared under these harsh chemical conditions often contains a large number of defects.

Ultrasound is a proven alternative to produce large quantities of high-quality graphene. Graphite is added to a mixture of dilute organic acid, alcohol and water, and the mixture is then exposed to ultrasonic radiation. The acid acts as a "molecular wedge" separating the graphene sheets from the parent graphite. Through this simple process, a large amount of undispersed, high-quality graphene dispersed in water was produced.

Graphene is a two-dimensional carbon nanomaterial with a hexagonal honeycomb lattice composed of carbon atoms with sp² hybrid orbitals. Graphene's carbon-atom-thick carbon flakes form graphite through non-bonded interactions and have an extremely large surface area.

"It is the thinnest substance in the universe and the strongest substance ever recorded. It exhibits enormous intrinsic carrier mobility, has the smallest effective mass (zero), and can carry out micrometer-long distances at room temperature Propagating without scattering. Graphene can sustain current densities 6 orders of magnitude higher than copper, exhibits record thermal conductivity and stiffness, is gas impermeable, and reconciles the conflicting properties of brittleness and ductility. Electrons in graphene The transport is described by a Dirac-like equation that allows the study of relativistic quantum phenomena in bench-top experiments.

When sonicating liquids at high intensity, sound waves propagating into the liquid medium cause alternating cycles of high pressure (compression) and low pressure (sparse), the rate of which depends on the ultrasonic frequency. During low-pressure cycling, high-intensity ultrasound creates small vacuum bubbles or voids in the liquid. When the bubbles reach a volume where they can no longer absorb energy, they collapse violently during high-pressure cycling. This phenomenon is called cavitation. During the implosion, very high temperatures (about 5,000 K) and pressures (about 2,000 atm) are locally reached. The implosion of cavitation bubbles also leads to liquid jet velocities as high as 280 m/s. The physicochemical changes induced by ultrasonic cavitation can be applied to graphene preparation.

Cavitation-induced sonochemistry provides a unique interaction between energy and matter, with hot spots within the bubble of ~5000K, pressures of ~1000bar, and heating and cooling rates greater than 1010K s-1; these special conditions allow access to a range of typically Inaccessible chemical reaction space, which allows the synthesis of a variety of unusual nanostructured materials.

Advantages of Ultrasonic Emulsification

The type of emulsion can be controlled.
The power required to produce the emulsion is small.
The formed emulsion is more stable, and some are stable for several months to more than half a year.
The concentration is high, the concentration of pure emulsion can exceed 30%, and the added emulsifier can reach 70%.
Low cost, an important feature of ultrasonic emulsification is that it can produce very stable emulsions without or with less emulsifiers.
Compared with general emulsification processes and equipment (such as propellers, colloid mills and homogenizers, etc.), ultrasonic emulsification has many advantages.
The resulting emulsions have a small average droplet size (0.2–2 μm) and a narrow droplet size distribution (0.1–10 μm) or narrower.