Every day, we interact with a myriad of surfaces ranging from soft fabrics to hard metals. Inevitably, this means we have to spend our time cleaning them. A class of self-cleaning materials would certainly make our lives easier. Previous attempts to create these materials have focused on developing surfaces that are rough and waxy; these cause water droplets to roll along the surface, picking up dirt and dust due as it goes. These materials have been relatively successful, but they have many limitations. For example, they’re easily worn away and easily contaminated by oils like those found on our skin. Luckily, scientists have now developed a waterproof, self cleaning coating that can be applied to materials that are as soft as cotton and as hard as glass. This coating is composed of titanium dioxide (TiO2) nanoparticles with two size distributions, delivered as a suspension in ethanol containing the chemical perfluorooctyltriethoxysilane. After application, the ethanol is allowed to evaporate for 180 seconds before the coating is ready for use. This coating can be sprayed, dipped, or painted onto a surface, and it maintains its performance after several types of damage. Read 6 remaining paragraphs | Comments
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Water droplets bounce off these new self-cleaning surfaces
