Glue
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The utility of the humble mussel in the world of medicine has expanded once again. This time, researchers figured out how to use a mussel-based glue to hold stem cells in place long enough to repair cartilage inside a rabbit's body.
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A powerful new adhesive can grip strongly in extreme temperatures, from the deep freeze of liquid nitrogen to the sweltering heat of an oven. Better yet, it can be broken back down into its component parts and reused without losing strength.
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Mussels have long been known for the adhesive they produce, which allows them to cling to rocks. The protein responsible has now been utilized in a new skin grafting technique, which reportedly results in little to no scarring.
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In order to spread to other host trees, the parasitic mistletoe plant has very sticky seeds that cling to bird feathers, bark, and other materials. According to a recent study, the "glue" on those seeds could inspire new biomedical adhesives.
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While we may think of wood as being earthy and natural, wooden materials such as plywood typically contain formaldehyde-based adhesives that give off toxic fumes. Such is not the case with a new adhesive, which is made from glucose and citric acid.
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Adhesives that hold underwater are elusive, but could be useful for marine repairs or tissue healing. Researchers have now developed a new type of adhesive hydrogel that combines the underwater stickiness of mussels with the strength of spider silk.
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It’s hard to get medical adhesives to stick when blood is making everything wet. Now, MIT researchers have developed a new surgical glue that can halt bleeding within 30 seconds, inspired by the super-strong underwater adhesive used by barnacles.
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Back in 2015, we heard about an electrically activated glue that could be used to bond items in wet conditions, or even underwater. Now, scientists have demonstrated that the material could be used to patch leaky blood vessels … from the inside.
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Although there are glues that work underwater, they typically require at least 24 hours to set – which can be tricky in chaotic marine environments. A new additive, however, reportedly allows underwater resin adhesives to set in just 60 seconds.
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Ordinarily, epoxies are cured by exposure to either heat or ultraviolet light. Both have their drawbacks, which are nicely avoided by a new epoxy that hardens when passed through a magnetic field to produce a similar bond using a fraction of the energy.
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Ordinarily, if you want to separate two objects that are glued together, harsh solvents or mechanical force are required – either one could damage the items. A new glue, however, releases its bond by simply turning to gas.
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While we've certainly heard of epoxy resins that harden when exposed to light, usually all of the substance has to be exposed. A new additive causes resin to solidify when even only a bit of it gets lit up, however – plus it works underwater.
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