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Adhesive

If you’ve known a dog that’s been quilled by a porcupine, then you’ll know that while those quills go in all-too-easily, it’s very difficult to pull them out. As part of a new research project, however, a team of scientists are looking at replicating those very characteristics in things like hypodermic needles and surgical adhesives. It turns out that what’s a bane to overly-inquisitive dogs may be a boon to medical technology. Read More
Pulling off a finger plaster is one of life’s little trials that can reveal a lot about a person. Do it fast or do it slow, it still hurts like heck and there’s no pretending that it didn't. For an adult, it’s an instant of pain, but for a newborn it can mean injury or even permanent scarring. In order to prevent this, a team of researchers are developing a new medical tape that can be pulled off safely without tearing delicate infant skin. Read More
A group of researchers at the University of Washington has found a way to isolate and identify medically interesting molecules using little more than scraps of office paper, a Ziplock bag and a cheap diluted solvent. If properly developed, the system – which requires minimal costs and know-how to build and operate – could be made to administer a wide range of medical tests nearly free of charge. Read More
Polytetrafluoroethylene (PTFE) is best known by the DuPont brand name Teflon. Whatever it is called, PTFE is the third slipperiest solid known – the poster child for non-stick, non-reactive, non-friction, non-conducting, high-temperature, and generally high-performing polymers. Silicone also has a nearly non-bondable surface – if you try to paint a silicone sealant, it simply pops off as the paint dries. In particular, creating a strong bond between PTFE and silicone has never been accomplished, even in the chemical laboratory. Until now. Read More
A strong and highly selective instant adhesive inspired by the bacterium Streptococcus pyogenes has been developed by Oxford University researchers. S. pyogenes is a common resident of human throats that is normally kept in check by the body's defenses, but when it gets out of control it can cause diseases ranging from strep throat to toxic shock syndrome or flesh-eating disease. By engineering a protein that is central to S. pyogenes' infectious arsenal, the researchers have developed a new superglue that can't be matched for sticking molecules together and not letting go. Read More
Everyone knows geckos have extraordinary powers of adhesion, able to clamber up vertical windows with remarkable ease. With the "Geckskin", a team of scientists have replicated the effect to produce a flat, index-card sized piece of material capable of carrying a 700-pound (318-kg) load - easily enough for a flatscreen television. It can be removed with ease and leaves no unpleasant oomska. And interestingly, it doesn't work as you might think. Read More
As is so often the case these days for those searching for a better way to stick stuff together, researchers from the Zoological Institute at the University of Kiel in Germany have turned to the biology of gravity-defying ceiling walkers, such as geckos and insects. These creatures served as inspiration for a new dry adhesive tape that not only boasts impressive bonding strength, but can also be attached and detached thousands of times without losing its adhesive properties. Read More
When it comes to “painless” bandages, many of us might assume that they’re designed mainly for children, who simply don’t like the sting that comes with the removal of conventional products. The fact is, however, that approximately 1.5 million patients in U.S. health care facilities receive skin injuries caused by bandage removal every year. Many of these patients are elderly, require repeated tapings in the same area, or have fragile skin for other reasons. It’s for people like these that 3M designed its new Kind Removal Silicone Tape. Read More
Few things are as disconcerting, or as curious, as the sight of a gecko or spider skittering effortlessly upside down along the ceiling. This ability is known to be facilitated by microscopic hairs or "setae" on the footpads of insects and mammals and a better understanding of their function could lead to advances in synthetic adhesives, wall climbing robots and yes, even the the holy-grail of the spiderman suit. Now for the first time, scientists studying leaf beetles have been able to measure the adhesive force from single setae in a live animal and in the process expand our knowledge of the role they play in clinging to diverse surfaces. Read More
When the caoutchouc tree is damaged, liquid latex containing capsules of the protein hevein escapes from inside of it. Those capsules rupture, releasing the hevein, which links the latex particles together and ultimately closes up the wound. The whole bursting/sealing-microcapsules thing is obviously a pretty good idea, as it has been put to use in human technology such as self-healing concrete, electronics, paint and aircraft epoxy resin. Now, German researchers have copied the caoutchouc tree’s modus operandi to create a self-sealing elastic polymer. Read More
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