Ultrasonic extraction based on ultrasonic treatment of acoustic cavitation effect. When the ultrasonic wave propagates in the liquid medium, it will form an alternating area of high and low pressure. Small bubbles are generated in the low pressure area, and the bubbles in the high pressure area collapse violently, releasing a lot of energy, producing local high temperature and high pressure, forming strong shock waves and high-speed microjets. This effect can destroy the cell wall of plant tissue, significantly enhance the efficiency of mass transfer between substances, allow solvents to penetrate more effectively into the solid matrix, and promote the transfer of target compounds from the solid matrix to the solvent.
Ultrasound-assisted extraction technology is advantageous in the extraction of bioactive compounds such as polyphenols, flavonoids and essential oils from plants or other natural sources. Compared with traditional extraction methods such as Soxhlet extraction, ultrasonic extraction has a higher extraction rate and can separate more target compounds from raw materials. The extraction time is greatly shortened and the production efficiency is greatly improved. Less solvent consumption reduces costs and is more environmentally friendly.
In practical applications, the ultrasonic-assisted extraction technology demonstrates significant advantages over traditional extraction methods. Taking the extraction of bioactive components from plants as an example, this technology shows strong applicability for substances such as polyphenolic antioxidants, flavonoids, and volatile essential oils.
With many advantages, ultrasonic extraction technology provides a powerful alternative to traditional extraction methods in the field of chemistry, revolutionizes the extraction process of bioactive compounds, and promotes technological progress in the field of natural product extraction.
