New Chemical Blend Helps Plastic Heal Itself

  • Posted by a hidden member.
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    May 10, 2014 4:24 PM GMT
    http://news.sciencemag.org/chemistry/2014/05/new-chemical-blend-helps-plastic-heal-itself

    Materials that heal themselves are going bigtime. Scientists have cooked up a chemical concoction that can patch a 9-millimeter-wide hole in a sheet of plastic, a self-repair orders of magnitude larger than ever demonstrated before. The finding could lead to new kinds of airplane wings and spacecraft components that can repair themselves midflight.

    “It’s exciting; I think it’s a big step forward in being able to autonomously heal structures without intervention,” says University of Michigan, Ann Arbor, mechanical engineer Ellen Arruda. She calls the researchers’ scheme “the polymer equivalent of a blood clot.”

    Complex life could never have evolved without the ability to heal itself. When an animal suffers a puncture wound, for example, compounds flow from blood vessels to the wound site, where they feed the growth of new tissue to fill the damaged area. The process, however, requires a vascular system to deliver the needed components. Because most nonliving materials lack this complexity, repair typically requires human intervention.

    Recently, though, scientists and engineers have begun designing materials that can patch up small defects. In one such scheme, narrow channels similar to animal blood vessels deliver compounds that seal small fissures in a material made of fiberglass and polymer resins. So far, such systems have only repaired fractures so small that opposite sides of the wound nearly touch. When the damage site is larger—say, the size of a bullet hole—liquid compounds tend to leak out before they can form a seal.
  • HottJoe

    Posts: 21366

    May 10, 2014 4:34 PM GMT
    The evolution of A.I. is both exhilarating and terrifying...

    I wonder if we have a creator who felt that way when we discovered fire.
  • roadbikeRob

    Posts: 14389

    May 10, 2014 4:51 PM GMT
    How about a new chemical blend that helps winter damaged asphalt pavements heal themselvesicon_question.gificon_idea.gif
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    May 10, 2014 5:48 PM GMT
    roadbikeRob saidHow about a new chemical blend that helps winter damaged asphalt pavements heal themselvesicon_question.gificon_idea.gif


    My guess is that the biggest issue is cost (and inertia from local city governments) but I have to hope that will change:

  • tj85016

    Posts: 4123

    May 10, 2014 5:52 PM GMT
    roadbikeRob saidHow about a new chemical blend that helps winter damaged asphalt pavements heal themselvesicon_question.gificon_idea.gif


    it's been around for awhile, but contractors need to eat
  • roadbikeRob

    Posts: 14389

    May 10, 2014 5:58 PM GMT
    tj85016 said
    roadbikeRob saidHow about a new chemical blend that helps winter damaged asphalt pavements heal themselvesicon_question.gificon_idea.gif


    it's been around for awhile, but contractors need to eat
    Fuck these crooked, politically connected, union contractors and their shoddy, half assed workmanshipicon_mad.gif
  • tj85016

    Posts: 4123

    May 10, 2014 6:04 PM GMT
    roadbikeRob said
    tj85016 said
    roadbikeRob saidHow about a new chemical blend that helps winter damaged asphalt pavements heal themselvesicon_question.gificon_idea.gif


    it's been around for awhile, but contractors need to eat
    Fuck these crooked, politically connected, union contractors and their shoddy, half assed workmanshipicon_mad.gif


    You don't know half of it, I was once publisher of this little trade magazine called "Highway & Heavy Construction" at Cahners Publishing

    Tens of billions have been spent on asphalt research both Federal and university grants (Lehigh, Univ of Maryland, Univ of Texas come to mind - - probably 100 more engineering schools got grants . . . nothing really ever happens icon_sad.gif)
  • roadbikeRob

    Posts: 14389

    May 10, 2014 7:29 PM GMT
    Well since there will most likely never be a chemical substance to heal winter damaged asphalt, lets focus on this new A.I. material that supposedly heals cracked and broken plastics, how does it workicon_question.gif
  • tj85016

    Posts: 4123

    May 10, 2014 10:50 PM GMT
    roadbikeRob saidWell since there will most likely never be a chemical substance to heal winter damaged asphalt, lets focus on this new A.I. material that supposedly heals cracked and broken plastics, how does it workicon_question.gif


    oh there's dozens of effective asphalt formulations do deter potholes and salt damage, we just don't use them, except on interstates