Ultrasonic peeling device for preparing graphene

Abstract

The invention discloses an ultrasonic peeling device for preparing graphene. The ultrasonic peeling device comprises a tank and a plurality of ultrasonic vibrating spears, wherein the plurality of ultrasonic vibrating spears are vertically fixed in the tank and are annularly distributed in the same frontal projection plane. The ultrasonic peeling device can ultrasonically irradiate the inner zone of the tank in all directions, thus achieving the purpose of remarkably increasing the power density of ultrasonic waves and shortening the peeling time.

Description

technical field [0001] The invention relates to the field of graphene, in particular to an ultrasonic stripping device for preparing graphene. Background technique [0002] Since its discovery in 2004, graphene has attracted much attention as a new type of carbon material. It is a completely sp 2 The quasi-two-dimensional crystal material composed of hybrid carbon atoms with a thickness of only one atomic layer or several single atomic layers has excellent properties such as high light transmission and electrical conductivity, high specific surface area, high strength and flexibility, etc. It is expected to be widely used in the fields of high-performance nanoelectronic devices, optoelectronic devices, gas sensors, composite materials, field emission materials and energy storage. [0003] At present, expansion ultrasonic exfoliation method is one of the main preparation methods of graphene. This method uses graphite intercalation compound as raw material, and ultrasonic e...

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Problems solved by technology

[0004] However, the existing technology represented by the above-mentioned patent documents still has the following defects in actual use: 1. The ultrasonic transducers are installed on the outer wall of the hexahedral tank body, and the distance between each transducer and the center of the tank body Different, resulting in uneven cavitation effect in each area of ​​the tank, which not only affects the stripping effect of graphene, but also reduces the utilization rate of graphene raw materials and the quality of graphene products

2. The ultrasonic transducer is installed on the outer wall of the tank. Due to the limited radiation distance of the ultrasonic wave, this structure limits the size of the tank. As a result, the ultrasonic stripping device using this structure is bound to be unable to prepare graphene products on a large scale

3. The transducers in this patent are bonded to the outer wall of the tank to form a vibrating plate. When graphene needs to be prepared on a large scale, dozens or even hundreds of transducers need to be glued on each side of the tank. The radiation area of ​​each transducer is small. This method not only increases the volume of the equipment, but also has the disadvantages of poor peeling effect, poor stability and inconvenient use, which is difficult to meet the requirements of industrial production.

4. Due to the limitation of the power of a single transducer (up to 120W), the power density in the tank is limited, which leads to the long-term operation of the equipment to achieve the ideal peeling effect

5. The service life of the transducer is relatively short, and it is inconvenient to replace

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