Three functions of ultrasonic vibrator
Date: 2022-10-06Number: 227
The key to ultrasonic technology is as a physical method and a special tool, which can produce a series of conditions that approximate the extreme critical condition in the process of producing chemical reaction, such energy can not only stimulate chemical reactions, speed up chemical reactions, high efficiency, and even change the characteristics of some chemical reactions, etc. , make the original chemical composition to produce some of the most effective and efficient effect and structure, this is called sonochemistry. The vast majority of chemical reactions can use sonochemistry as a physical aid, such as extraction and separation, synthesis, biodiesel production, treatment of microorganisms, degradation of harmful organic substances, biodegradable plastics, bio-cell fragmentation, dispersion and coagulation, and so on. Therefore, the ultrasonic vibrator can not only be used for cleaning items, the stain will be peeled off the surface of the object, but also to promote scientific research further success.
The following three functions of the ultrasonic vibrator are described.
Ultrasonic dispersion: liquid medium, according to the“Cavitation” effect of ultrasound in the liquid, the particle matter in the liquid is dispersed and deagglomerated. Ultrasonic dispersion is generally divided into emulsion dispersion, i. e. liquid and liquid dispersion, and suspension dispersion, i. e. solid and liquid dispersion. Its function has already obtained the practical practice and the application in many aspects. In this case, ultrasound is used for dispersion of suspensions, such as dispersing titanium oxide into water or organic solvents in the paint and plastics industry, dispersing dyes into molten paraffin, dispersing pharmaceutical particles in the pharmaceutical industry, and dispersing powdered emulsions in the food industry.
Ultrasonic extraction: ultrasonic extraction and separation is usually based on the existence of effective components and effective components in the state of the group, polarity, solubility, and so on a scientific, rational use of ultrasonic vibration to extract the new process, make the organic solvent quickly spread to every corner of the surface of the solid matter, and dissolve the organic matter in the organic solvent as completely as possible, so as to obtain a multi-component mixed extraction solution, continue to use the appropriate separation methods, the extraction of the chemical components, and then refined, purification solution, according to such a complete process, the final chemical composition of the monomer can be obtained.
Ultrasonic emulsification: ultrasonic emulsification refers to under the influence of ultrasonic energy, so that two (or more) dissolvable liquid stirring evenly to produce dispersed system, a process in which one of the liquids is uniformly distributed in a liquid to produce an emulsion. The physical mechanism of breaking insoluble solids (or liquids) is the cavitation of ultrasonic waves. Ultrasonic cavitation refers to the formation of many bubbles in a liquid under Sonication. The small bubbles will gradually increase with the ultrasonic vibration, and then burst and collapse suddenly, countless small bubbles repeatedly increase and collapse, in accelerating the collapse, the bubble will also produce high temperature and high pressure, the liquid around the bubble rushed into the bubble at high speed, but formed a strong partial oscillation wave in the liquid around the bubble, and then formed a local high temperature and high pressure, and then formed ultrasonic breaking and emulsification.