The chemistry of foam using surfactants.
Green (Saitama University Research Seed Collection 2025-25 p.104)
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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Keisuke Matsuoka, Associate Professor Faculty of Education 【Recent Research Themes】 ● Formation and solubilization of biosurfactant aggregates ● Solubilization of fullerenes ● Development and properties of functional surfactants ● Colored soap bubbles ● Application of foaming separation for decellularization of organs
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【Appeal Points to the Industry】 ● Removal of dissolved substances using foam separation technology. ● Educational materials using colored soap bubbles. ● Base materials for regenerative medicine through decellularization of organs. 【Examples of Practical Application, Use Cases, and Utilization】 ● Removal from contaminated water of radioactive metal compounds. ● Removal from contaminated water of harmful metals. ● Removal from contaminated water of organic compounds. ● Regeneration of organs.
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Colorful soap bubbles
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The Saitama University Open Innovation Center is a center that functions as a liaison office for industry-academia-government collaboration. It consists of three departments: the Industry-Academia-Government Collaboration Department, the Intellectual Property Department, and the Startup Support Department, each staffed with coordinators well-versed in various fields. The center's activities include solving technical challenges in companies, supporting the implementation of joint research, and conducting technology transfer aimed at introducing and utilizing Saitama University's intellectual property.