Hydrophobic

There's a problem with most bandages – because they adhere to the wound as it heals, they may reopen it when removed. A new wound dressing, however, doesn't stick to wounds, yet it does help stop the bleeding.

In environments ranging from hospitals to food preparation areas, it's vitally important to keep surfaces as bacteria-free as possible. A new material could definitely help, as it's claimed to repel even antibiotic-resistant "superbug" microbes.

Like anything else, concrete structures get dirty over time, and it's a hassle to clean them. Such chores may soon no longer be necessary, however, as scientists have developed what they claim is a self-cleaning concrete that isn't heavy – or weak.

Superhydrophobic materials, which are excellent at repelling water, can be extremely useful for a whole range of reasons. Now engineers have found a quirky new use for them – making “unsinkable” metals that stay floating even when punctured.

Scientists have copied the porcupinefish's spines to create a water-repellent material that's more robust than previous efforts.

​As many a fancy-refrigerator-owner will know, fingerprints tend to be highly visible on stainless steel. A new transparent coating could help, however, as it goes about reducing the appearance of prints in three ways.

​We've already heard about water-repellant materials that copy the structure of the lotus leaf. Now, however, scientists have created a flexible optical plastic that wards off liquids even better, and it was inspired by something else – the humble Enoki mushroom.

To make ships and submarines slippier, Anish Tuteja, an associate professor of materials science and engineering at the University of Michigan, is working on an "omniphobic" coating that not only repels water, but many other substances, like oil, alcohol, and even peanut butter.

Using waste products of the petroleum and refining industries, researchers have created an absorbent polymer that can quickly soak up crude oil and diesel from sea water.

Our phones follow us everywhere – which often puts them in the line of fire for spilt drinks or rain. But now a team at the University of Michigan has developed a durable, clear coating that could help phones – or any surface, for that matter – repel almost any liquid.

​When it comes to naturally repelling things, the humble cicada seems to have a few tricks up its sleeve. Now scientists have zeroed in on the insect's ability to repel water, which could provide inspiration for anti-icing and self-cleaning materials further down the track.

To make water repellent coatings that are a self-healing, a team of scientists led by Jürgen Rühe at the University of Freiburg in Germany has come up with a superhydrophobic that sheds its outer skin like a snake to repair itself after being damaged.