1. 13:22 7th Sep 2012

    Notes: 6

    Tags: TechnologyTechMaterialsScienceManufacturingHydrogelsMetamaterials

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    Hydrogels: Self-Healing, Super Strong and Super-Elastic Toughness is a major plus for hydrogels. Their semi-solidity makes them a good choice for add-on biological materials, like contact lenses or drug-delivery systems, and even stronger hydrogels could be used for bigger projects… This particular gel comes from Harvard University materials engineer Zhigang Suo, who, along with a team, created the gel from two polymers: alginate and polyacrylamide… The ionic bonds of the alginate molecules break and reform under pressure, spreading the energy of an impact over a wider area. That also protects the covalent bonds in the polyacrylamide molecules, which hold the gel together. What does that translate to? A hydrogel as tough as rubber that can stretch 20 times its normal length, and that can do this to a ball of metal [see video] (via Video: A Ball of Metal Bounces Off a Thin Sheet of Super-Tough Hydrogel | Popular Science)

    Hydrogels: Self-Healing, Super Strong and Super-Elastic

    Toughness is a major plus for hydrogels. Their semi-solidity makes them a good choice for add-on biological materials, like contact lenses or drug-delivery systems, and even stronger hydrogels could be used for bigger projects…

    This particular gel comes from Harvard University materials engineer Zhigang Suo, who, along with a team, created the gel from two polymers: alginate and polyacrylamide…

    The ionic bonds of the alginate molecules break and reform under pressure, spreading the energy of an impact over a wider area. That also protects the covalent bonds in the polyacrylamide molecules, which hold the gel together.

    What does that translate to? A hydrogel as tough as rubber that can stretch 20 times its normal length, and that can do this to a ball of metal [see video]

    (via Video: A Ball of Metal Bounces Off a Thin Sheet of Super-Tough Hydrogel | Popular Science)

     
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