Ultrasonic topic: "Ultrasonic Deagglomeration"
Deagglomeration describes the process of breaking up or dispersing particles which have agglomerated, aggregated, or formed clusters. Interparticle forces can be classified into two groups: Adhesive forces such as van der Waals, electrostatic and magnetic attraction, mechanical interlocking and chemical bonds require no material bridge between the particles. Solid bridges, capillary bonding forces and immobile
liquid bridges are based on the formation of solid connections between particles.
Ultrasonic deagglomeration and dispersing is a powerful method to break particle agglomerates and aggregates into individual particles and results in uniformly dispersed suspensions. An important application field of ultrasonic dispersers is the dispersion of nanoparticles such as carbon nanotubes, silica, alumina, titanium dioxide or magnetite.
Acoustic cavitation, the working principle behind ultrasonic deagglomeration and milling, creates intense hydraulic shear forces, which overcome the interparticle bondings and promote deagglomeration of agglomerated particles to mono-dispersed nanoparticles.
Read more about ultrasonic dispersing, deagglomeration and wet-milling of nano-particles!
Found 30 hits. Showing results 13 - 24.
Ultrasonic Dispersion of Graphene
To incorporate graphene into composites, it is essential to disperse or exfoliate the graphene into single nano-sheets uniformly throughout the formulation. The more thoroughly the graphene is deagglomerated, the better its extraordinary material properties can be utilized. Ultrasonic dispersion offers…
https://www.hielscher.com/ultrasonic-dispersion-of-graphene.htm
Ultrasonic Exfoliation of Water-Dispersible Graphene
Mono- and bi-layer graphene nanosheets can be produced rapidly via ultrasonic exfoliation with high throughput and at low cost. Ultrasonically exfoliated graphene can be functionalized with biopolymers in order to obtain water-dispersible graphene. By ultrasonic cavitation, the synthesized graphene can…
https://www.hielscher.com/ultrasonic-exfoliation-of-water-dispersible-graphene.htm
Ultrasonically Intensified Fixed Bed Reactors
Ultrasonic mixing and dispersion activates and intensifies the catalytic reaction in fixed bed reactors. The sonication improves the mass transfer and increases thereby efficiency, conversion rate and yield. An additional benefit is the removal of passivating fouling layers from the…
https://www.hielscher.com/ultrasonically-intensified-fixed-bed-reactors.htm
Ultrasonic Formulation of Reinforced Composites
Composites show unique material properties such as significantly enhanced thermo-stability, elastic modulus, tensile strength, fracture strength and are therefore widely used in the manufacturing of manifold products. Sonication is proven to produce high-quality nanocomposites with highly dispersed CNTs, graphene etc.…
https://www.hielscher.com/ultrasonic-formulation-of-reinforced-composites.htm
Ultrasonic Dispersing of Activated Charcoal
Activated charcoal and active carbons are widely used in cosmetic, medical and industrial products. For best results, active charcoal must be uniformly dispersed: The smaller the particle size, the larger the particle surface, the better the activity. Ultrasonic dispersion gives…
https://www.hielscher.com/ultrasonic-dispersing-of-activated-charcoal.htm
Ultrasonic Malting and Malt Germination
Malting is a time-consuming process: the soaking and hydration of the grain seeds takes a lot of time and achieves mostly uneven results. By ultrasonication, the germination speed, rate and yield of barley can be significantly improved. Malt Production Malt…
https://www.hielscher.com/ultrasonic-malting.htm
Ultrasonic Cavitation in Liquids
Ultrasonic waves of high intensity ultrasound generate acoustic cavitation in liquids. Cavitation causes extreme effects locally, such as liquid jets of up to 1000km/hr, pressures of up to 2000 atm and temperatures of up to 5000 Kelvin. These ultrasonically-generated forces…
https://www.hielscher.com/ultrasonic-cavitation-in-liquids-2.htm
GDmini2 – Ultrasonic Inline Micro-Reactor
The GDmini2 is an ultrasonic micro-reactor for the indirect, temperature-controlled sonication of liquid media. Applications include: Homogenization, emulsification, particle synthesis, solvent extraction, cell lysis and fragmentation. The GDmini2 is an ultrasonic homogenizer in the shape of a straight glass tube.…
https://www.hielscher.com/gdmini2-ultrasonic-inline-micro-reactor.htm
The Effects of an Ultrasonic Disperser on Inline Measurements
For the characterization and measurement of primary particles, the particles should be well dispersed as agglomerates falsify the measurement results. Ultrasound is a reliable tool to destroy agglomerates and to create conditions where the primary particles are hold in adequate…
https://www.hielscher.com/the-effects-of-an-ultrasonic-disperser-on-inline-measurements.htm
Sonofragmentation – The Effect of Power Ultrasound on Particle Breakage
Sonofragmentation describes the breakage of particles into nano-sized fragments by high power ultrasound. In contrast to the common ultrasonic deagglomeration and milling - where particles are mainly grinded and separated by inter-particle collision - , sono-fragementation is distinguished by the…
https://www.hielscher.com/sonofragmentation-the-effect-of-power-ultrasound-on-particle-breakage.htm
How To Disperse Single-Walled Carbon Nanotubes Individually
Single-Walled Carbon Nanotubes (SWNTs or SWCNTs) have unique characteristics, but to express them they must be individually dispersed. To make full use of the exceptional characteristics of single-walled carbon nanotubes, the tubes must be detangled most completely. SWNTs as other…
https://www.hielscher.com/how-to-disperse-single-walled-carbon-nanotubes-individually.htm
Ultrasonic Treatment of Nanoparticles for Pharmaceuticals
Probe-type sonicators play a crucial role in pharmaceutical research and manufacturing by providing a powerful and controlled means of achieving particle size reduction, cell disruption, and homogenization. Sonicators utilize ultrasonic waves to generate cavitation, resulting in the formation and collapse…
https://www.hielscher.com/ultrasonic-treatment-of-nanoparticles-for-pharmaceuticals.htm