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Technology of disintegration of microparticles and nanoparticles by application of high energy cavitating liquid jet

Country of Origin: Czech Republic
Reference Number: TOCZ20160603001
Publication Date: 14 June 2016

Summary

The Czech university developed a new method which solves the problem of disintegration of preparing nanoparticles using top-down and the same problem exfoliation lamellar microstructures such as preparation of graphene from graphite particles. 
The university is looking for a private entities which will use the results in their own business activities and offer licence and commercial agency agreement with technical assistance.

Description

A university from the Czech Republic developed a solution for disintegration of preparing nanoparticles and exfoliation lamellar microstructures such as preparation of graphene from graphite particles.
The method of disintegration of solid microparticles and nanoparticles by cavitation liquid jet in the liquid dispersion is based on extreme mechanical stress solids upon implosion of cavitation bubbles on their outer surface. Cavitation is achieved in that the inwardly flowing degassed liquid dispersion of solid microparticles and nanoparticles under static or modulated pressure higher than 0.1 MPa enters high energy liquid jet degassed dispersion liquid or liquid dispersion, which in the area of entry creates a zone of intense cavitation. Heterogeneous nucleation of pure steam cavitation of microbubbles at the outer surface of the solid particles is thermodynamically much more likely than homogeneous nucleation. For these reasons, in the design desintegrator Water Jet Mill, preferably to collapse of the cavitation bubbles on the surface of the disintegrated particles, representing the dominant mechanism of disintegration. Liquid dispersion of solid microparticles and nanoparticles flow cavitation zone at a rate at which cavitation bubbles may attain a maximum size of order of hundreds of microns. When implosive collapse of the cavitation microbubbles are formed by substantially higher pressures and shocks impinging on the material particles. Macroscopic field with a high degree of cavitation contain a very large number of dispersed particles, in which there is nucleation and collapse of cavitation bubbles. Very numerous impacts liquid interface on the surfaces of the particles is in contrast to other methods disintegration significantly suppressed the contamination of the material disintegrated material disintegration bodies and parts of disintegrator. Dispersion liquid may be water, aqueous salt solutions, or solutions of liquid hydrocarbons.
The university would like to offer this new technical solution to commercial partners which would use it in their production. Licence and commercial agency agreement with technical assistance are offered.

Advantages and Innovations

Preparation of nanoparticles using mentioned method is highly efficient and significantly reduces the contamination of the disintegrated material in interaction with the grinding media and walls. The new method solves the problem of disintegration of preparing nanoparticles using top-down and the same problem exfoliation lamellar microstructures such as preparation of graphene from graphite particles. Preparation of nanoparticles above method significantly reduces contamination of the shredded material interaction with the grinding media and walls.

Stage Of Development

Available for demonstration

Requested partner

The university is seeking commercial partners from materials processing sector, from engineering or from nano and microtechnologies sector to use the technology in their own production. 
The university offers licence and commercial agency agreement with technical assistance and will provide an technical assistance at the beginning of cooperation.

Kooperationsanfrage stellen