The main factors affecting the sonochemical reaction are mainly 3 points, the sound field frequency, the sound field energy, and the temperature of the solution.
Sound field frequency
The frequency of the sound field has a significant influence on the sonochemical reaction. In general, the effect of the pulsed ultrasound is better than that of the continuous ultrasound. The modulation method of the sound source is also very important. The duty cycle of the pulse is 1:1–1. :1.5 Acoustic chemical reaction has a higher induction rate.
Sound field energy
The energy of the sound field depends on the power of the ultrasonic transducer, which is the determinant of the biochemical reaction. Acceleration and activation of the sonochemical reaction result from the cavitation of the ultrasonic wave. Only when the sound intensity reaches a certain level in Chengdu can the Air bubbles that vibrate with ultrasonic frequencies close, the higher the sound intensity, the faster the closure speed, the stronger the pressure waves that are generated, the higher the temperature and pressure at the hot spots, and the more cavitation effects of others. Dramatically triggers and initiates a series of sonochemical reactions.
The temperature of the solution
The temperature of the solution is also an important factor. In the past, people believed that the temperature increased and the viscosity of the solution decreased. In this way, the radius of the nucleus of the cavitation and the frequency of the sound field were not matched, which led to a decrease in the number of cavitation nucleators capable of generating a cavitation effect and a decrease in the reaction rate. Recent studies have shown that The decrease of the viscosity of the solution is not the main reason. After the temperature of the solution rises, the gas dissolved in the solution escapes in large quantities. As a result, the generation amount of the cavitation nucleus decreases, and the reaction speed decreases.