Ultrasonic Production of Nano-Size Dispersions and Emulsions

Thomas Hielscher (1)

1 Dr. Hielscher GmbH

Ultrasound is a well-established method for particle size reduction in dispersions and emulsions. Ultrasonic processors are used in the generation of nano-size material slurries, dispersions and emulsions because of the potential in the deagglomeration and the reduction of primaries. These are the mechanical effects of ultrasonic cavitation. Ultrasound can also be used to influence chemical reactions by the cavitation energy. This is sonochemistry. As the market for nano-size materials grows, the demand for ultrasonic processes at production level increases. At this stage, energy efficiency becomes important. Since the energy required per weight or volume of processed material links directly to the equipment size required, optimization of the process efficiency is essential to reduce investment and operational costs. Furthermore it is required to scale the lab and bench top configurations to this final level without any variations in the process achievements. Scale up by power alone will not do this.

Mots clés: Nano-size materials Nano-size dispersions and emulsions Nano-sizing Ultrasound Cavitation Deagglomeration Particle size reduction Ultrasonic applications Sonotrode Colloid technologies

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Thomas Hielscher. Ultrasonic Production of Nano-Size Dispersions and Emulsions. ENS 2005, Dec 2005, Paris, France. pp.138-143. ⟨hal-00166996⟩