👉 A raising fluid, also known as a raising liquid or a raising agent, is a substance that is added to a solution to increase its surface tension. This is typically achieved by introducing an amphiphilic molecule, which has both hydrophilic (water-loving) and hydrophobic (water-repelling) properties. When the raising fluid is introduced, its hydrophobic tails interact with the non-polar components of the solution, while its hydrophilic heads remain attracted to water. This interaction causes the molecules at the liquid-air interface to rearrange, forming a more tightly packed layer that enhances the surface tension. Raising fluids are commonly used in various applications, including detergents, paints, and pharmaceuticals, to improve the wetting and spreading properties of liquids on surfaces.
