Explanation of the application process of ultrasonic emulsification, dispersion and mixing of two or more incompatible solutions
Phacoemulsification refers to the process of mixing two (or more than two) immiscible solutions uniformly to form a dispersion system under the action of ultrasonic energy, in which one liquid is evenly distributed in the other liquid to form an emulsion.
The physical mechanism of two or more insoluble bodies is the cavitation of ultrasonic waves. Ultrasonic cavitation effect means that a large number of bubbles will be generated in the liquid under the action of strong ultrasonic waves. Small bubbles will gradually grow and increase with the ultrasonic vibration, and then suddenly burst and split, and the split bubbles will continue to grow and burst. . When these small bubbles collapse rapidly, high temperature and high pressure are generated in the bubble, and because the liquid around the bubble rushes into the bubble at a high speed, a strong local shock wave is generated in the liquid near the bubble, and a local high temperature and high pressure is also formed. Ultrasonic breaking and emulsification.
Phacoemulsification has the following outstanding features
1. The average droplet size of the emulsion formed by ultrasonic emulsification is small, which can be 0.2-2um; the droplet size distribution range is narrow, which can be 0.1-10um or narrower.
2. The concentration of ultrasonic emulsion is high, the concentration of pure emulsion can exceed 30%, and the addition of emulsifier can be as high as 70%.
3. The formed emulsion is more stable. An important feature of phacoemulsification is that it can produce extremely stable emulsions without or using less emulsifiers.
4. The type of emulsion can be controlled. Using phacoemulsification, under certain sound field conditions, both O/W (oil-in-water) and W/O (water-in-oil) emulsions can be prepared; however, it is impossible to use mechanical emulsification methods, only the properties of emulsifiers In order to control the type of emulsion.
5. Toluene is emulsified in water, one type of emulsion can be formed under low sound intensity conditions, and another type of emulsion can be formed under high sound intensity conditions.
6. Ultrasonic emulsification requires low power for producing slag.
The focused full-power series can be applied to both laboratory-grade and industrial-grade sonochemical processing, meeting the requirements of all users, and has the following characteristics
1. The ultrasonic power density is large, and it can handle the oil-water emulsification process that the low power density cannot handle.
2. Multiple frequencies are available to solve the problems of ultrasonic processing in various industries
3. Speed up the reaction and shorten the emulsification time of the original process
4. The emulsification efficiency is increased, the utilization rate of raw materials is increased, and resources are saved
5. Reduce energy consumption
6. Save catalyst
7. Break the macromolecular chain
8. Low investment and easy installation
9. It can be used in high pressure, high temperature, toxic and dangerous environments
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