Waterproof Material using Fly-Ash
Researchers at IIT Hyderabad have developed a cheap waterproof material by coating fly ash. As Fly ash is extremely water-loving, it can be turned into water-repellant material after using stearic acid. Stearic acid has two parts - hydrophilic part is called the head hydrophobic part is called the tail Hydrophilic part binds to fly ash particles, the water repelling part remains free. Fly ash varies in size. It is of 100 nms to 1 microns. The stearic-acid coated fly ashes surface can be made to behave like one of the two water-repelling materials -rose petals or lotus leaves. In case of a rose petal, the surface repels the water but at the same time the structure of the petal ensures that the water droplets stick fast to it. In case of lotus leaf, water droplets rolls off easily. Dr.Atul Suresh Deshpande ( Department of Material Science and Metallurgical Engineering ) says "When we used particles of more or less uniform size, the inter-particle space is more and w...