What are micro-nano bubbles

2022-03-09 10:53:12

Micro-nano bubbles are bubbles with a diameter of hundreds of microns or less, generally 0.1 to 50 μm. When such bubbles are mostly present in water, the solution is milky white, also known as milk water. In 1994, Parker et al. confirmed the existence of micro- and nano-bubbles based on the precise measurement of the remote-controlled attraction in the middle of the hydrophobic surface layer in water (beyond the range of van der Waals forces). In 2000, micro-nanobubbles were first shown by tapping in water according to atomic force optical microscopy (AFM). In the AFM image, the nanobubble is a bright ball, and some bubbles can remain for many hours for a long time. Due to the characteristics of small size, high air pressure, large specific surface, strong oxidizing property, enhanced convective heat transfer, and no secondary pollution, micro-nano bubbles are widely used in environmental remediation, water quality oxygenation, diagnosis and treatment, food industry, daily life and other industries. focus on.