Utrasonic topic: "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!
12 pages about this topic are being shown:
Improved Textile Fiber Dyeing with Ultrasonics
Ultrasonically assisted dyeing of fibers and fabrics improves the penetration of the dye into the fiber pores and increases colour strength and colour fastness significantly. Ultrasonic dyeing is a rapid process, which can be run under mild conditions and…
https://www.hielscher.com/improved-textile-fiber-dyeing-with-ultrasonics.htm
Graphene Oxide – Ultrasonic Exfoliation and Dispersion
Graphene oxide is water-soluble, amphiphilic, non-toxic, biodegradable and can be easily dispersed into stable colloids. Ultrasonic exfoliation and dispersion is an very efficient, rapid and cost-effective method to synthesize, disperse and functionalize graphene oxide on industrial scale. In downstream…
https://www.hielscher.com/graphene-oxide-ultrasonic-exfoliation-and-dispersion.htm
Ultrasonic Dispersion of Polishing Agents (CMP)
Non-uniform particle size and inhomogeneous particle size distribution causes severe damages to the polished surface during a CMP process. Ultrasonic dispersion is a superior technique to disperse and deagglomerate nano-sized polishing particles. The uniform dispersion achieved by sonication results…
https://www.hielscher.com/ultrasonic-dispersion-of-polishing-agents-cmp.htm
Ultrasonic Dispersion of Graphene
To incorporate graphene into composites, the graphene must be dispersed/exfoliated as single nano-sheets uniformly into the formulation. The higher the grade of deagglomeration, the better the extraordinary material properties are exploited. Ultrasonic dispersion enables for a superior particle distribution…
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…
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…
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…
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…
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. …
https://www.hielscher.com/ultrasonic-malting.htm
Ultrasonic Cavitation in Liquids
Ultrasonic waves of high intensity ultrasound generate cavitation in liquids. Cavitation causes extreme effects locally, such as liquid jets of up to 1000km/hr, pressures of up to 2000atm and temperatures of up to 5000 Kelvin. Background When…
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…
https://www.hielscher.com/the-effects-of-an-ultrasonic-disperser-on-inline-measurements.htm