How Do You Use Magic Sand?

Magic Sand, also known as hydrophobic sand, is a toy made from sand coated with a hydrophobic compound. This coating prevents water from clinging to the sand, making it hydrophobic (water-hating). The chemistry behind this phenomenon is complex and involves the addition of a thin layer of a chemical called silicon dioxide. Magic Sand is not cursed or magical, but rather normal sand that has been coated with a special hydrophobic coating.

Magic Sand was originally developed to clean up oil spills by repelling water while helping attract and trap oil. Its unique “viscoelastic” properties allow particles to move around each other and flow in the liquid when applied at low momentum. When applied at high momentum, the wax repels the water, making it wet. Kinetic sand, another type of magic sand, is coated with silicone oil, giving it its unique viscoelastic properties.

When added to water, Magic Sand appears to bond to itself, forming interesting shapes. However, when the water is poured over it, it becomes wet, making it difficult for the sand to absorb the water. To create Magic Sand, companies start with standard sand, silicon dioxide, and then add a thin layer of a water-repellent material like silicone or wax. This coating allows the sand to behave like a water-hating sand, preventing water from clinging to it.

In conclusion, Magic Sand is a unique and effective solution for cleaning up oil spills by preventing water from clinging to the sand. By understanding the chemistry behind this phenomenon and exploring its applications, companies can create a more sustainable and environmentally friendly alternative to traditional sand.