Utrasonic topic: "Ultrasonic Cavitation and its Applications"
When high-power ultrasound is coupled into liquid, acoustic cavitation occurs. Acoustic cavitation creates extreme conditions, including very high temperature and pressure differentials, turbulences, shear forces and liquid jets. These intense forces of ultrasonic cavitation are used for various applications such as homogenization, emulsification, dispersing & wet-milling, extraction, disintegration and sonochemical reactions.
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Ultrasonic extraction is the preferred technique to isolate bioactive compounds from botanicals. Sonication achieves a complete extraction and thereby superior extract yields are obtained in a very short extraction time. Being such an efficient extraction method, ultrasonic extraction is…https://www.hielscher.com/ultrasonic-extraction-and-its-working-principle.htm
Cavitation erosion occurs on material surfaces that are exposed to intense ultrasonic cavitation. Cavitation erosion testing is a fast method to measure erosion resistance of materials or coatings to intense stress and other erosion factors. It provides an easy…https://www.hielscher.com/cavitation-erosion-testing.htm
Chitosan is a chitin-derived biopolymer which has many applications in pharma, food, agriculture and industry. Ultrasonic deacetylation of chitin to chitosan intensifies the treatment significantly - leading to an efficient and fast process with a high chitosan yield of…https://www.hielscher.com/ultrasonic-deacetylation-of-chitin-to-chitosan.htm
Water-soluble polyhydroxylated C60 fullerene, called fullerenol or fullerol, is a strong free radical scavenger and is therefore used as an antioxidant in supplements and pharmaceuticals. Ultrasonic hydroxylation is a rapid and simple one-step reaction, which is used to produce…https://www.hielscher.com/ultrasonic-polyhydroxylated-c60-fullerenol.htm
Ultrasonic retting of fibrous materials such as hemp and flax fibers allows for a fast and efficient fiber modification. Ultrasonically processed bast fibers are fibrillated and show a significantly higher specific surface, increased tensile strength and flexibility. Ultrasonic fiber…https://www.hielscher.com/ultrasonic-hemp-fibre-processing.htm
Anthocyanins are widely used as natural colorant and nutritional additive in food products. Ultrasonic extraction promotes the release of high-quality anthocyanins from plants resulting in higher yields and a rapid process. Sonication is a mild, green and efficient technique…https://www.hielscher.com/ultrasonic-anthocyanin-extraction.htm
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
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
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
Liquid egg products (whole egg, egg white, yolk) must be pasteurized to ensure food safety. Ultrasonic homogenizers deliver intense cavitation and high shear forces to kill microbes. Especially when combined with elevated temperatures (∼50°C) and pressure (mano-thermosonication), power ultrasound…https://www.hielscher.com/ultrasonic-homogenization-of-liquid-egg.htm
Power ultrasound in molten metals and alloys shows various beneficial effects such as structuring, degassing, and improved filtration. Ultrasonic promotes the non-dendritic solidification in liquid and semi-solid metals. Sonication has significant benefits on the microstructural refinement of dendritic grains…https://www.hielscher.com/ultrasonic-processing-of-metal-melts.htm
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