The chemistry of foam using surfactants.

Keywords: foam separation, surfactants, contaminated water purification, cesium removal, decellularization, colored soap bubbles

When bubbles are generated in an aqueous solution containing surfactants, metals and organic substances can be adsorbed onto the surface of the surfactant-containing bubbles. The bubbles that rise to the gas-liquid interface form foam, which can act as a carrier for substances adsorbed from the solution. By utilizing this foam, it is possible to remove dissolved substances from water. On the other hand, the foam that has expanded into a spherical shape is known as a soap bubble. The thin film of this soap bubble, which is only a few hundred nanometers thick, has the characteristic of being difficult to adsorb dye particles or molecules under gravity. If we can color these soap bubbles, we can create beautiful colored soap bubbles. Research is also being conducted to add color to soap bubbles. Additionally, efforts are being made to discover new functions and properties of surfactants through research. Studies are also being conducted to use surfactant solutions for cleaning organs and creating decellularized organs for regenerative medicine.

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