Surfactant science and technology pdf
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Introduction to Surfactants
Surfactant Science and Technology: Retrospects and Prospects
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They can be fun to make using colorful construction paper or other craft supplies. But did you know you can make a simple one with milk, liquid soap or detergent and food coloring? How the rainbow is created by this mixture might surprise you! In this science activity you'll make your own milk rainbow and explore how detergent and surface tension are involved in its creation. Background In a liquid, the molecules small individual particles that can have positive and negative charges on their surfaces can, just like magnets, attract and repel one another.
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Surfactants are compounds that lower the surface tension or interfacial tension between two liquids, between a gas and a liquid, or between a liquid and a solid. Surfactants may act as detergents , wetting agents, emulsifiers , foaming agents , and dispersants. The word surfactant is a blend of surface-active agent. Surfactants are usually organic compounds that are amphiphilic , meaning they contain both hydrophobic groups their tails and hydrophilic groups their heads. Surfactants will diffuse in water and adsorb at interfaces between air and water or at the interface between oil and water, in the case where water is mixed with oil. The water-insoluble hydrophobic group may extend out of the bulk water phase, into the air or into the oil phase, while the water-soluble head group remains in the water phase.