14 comments

  • alexpotato 13 hours ago
    Nice to see Pykrete being mentioned!

    https://en.wikipedia.org/wiki/Pykrete

    Fun fact: you don't need sawdust for pykrete. Adding any kind of material e.g. just newspapers can help similar to how rebar makes concrete stronger

    • gcanyon 1 hour ago
      Came to the comments for the pykrete reference, thanks for this.
  • soperj 1 hour ago
    I feel like the obvious answer here for use is at the skating rink.
    • orbital-decay 45 minutes ago
      It's not necessarily a bonus, different sports need completely different ice properties (e.g. figure skating vs hockey), and a managed arena needs ease of maintenance.
      • soperj 31 minutes ago
        I spend an enormous amount of time at the rink (18 ice times in the last 9 days). Can you explain this? Because I don't see the difference between the ice for figure skating vs hockey, both of which happen daily at our local rink.
        • orbital-decay 3 minutes ago
          Hockey needs colder/tougher ice, for figure skating it ideally needs to be a whole degree C warmer to get better blade penetration. Yes you can balance it and public rinks will keep it constant throughout a day, however for dedicated events it's adjusted (at least it is in our rink).
  • Gravityloss 16 hours ago
    A local magazine did a test on ice cream cone melting. Some of those were still intact looking after sitting open at room temperature for an hour. Hooray for additives! So it's not a fundamentally new idea. These have to be safe to eat so maybe not too harmful for environment, though you never know.

    Some parts of the world use ice roads and have struggled with warm winters. Maybe this could be used to improve the strength and extend time in the spring.

    • gus_massa 15 hours ago
      Which additive were they using? This article [1] use poliphenols, that are very different from the modified celulose in the top article.

      [1] https://thisismold.com/uncategorized/the-science-behind-the-...

      • Gravityloss 14 hours ago
        https://yle.fi/a/74-20234378

        Carob extract and guar gum at least.

        • gus_massa 14 hours ago
          Thanks for the link. I took a look at the wikipedia pages of the gums and they are closer to the modified celulose in the main article than to the polyphenols in the article I linked.

          It's very complicated to compare, because they use other sugars and there are a thousand of details that are important, like how long are branchy the molecules are, and also a million of details that are above my chemistry knodledge level.

          As a persomal prefference, I'd call that jelly instead of ice cream. (And in a bad day that I want to lie a little just to be mean, I'd call them a piece of cake.)

  • abc123abc123 15 hours ago
    Wonder if this will then be used to fulfill the dream of shooting ice bullets which then melt inside the victim, leaving less evidence. If memory serves, I think the CIA explored this at some remote point in time.
    • aqme28 15 hours ago
      Well no, because these aren't just ice-- it's an ice composite.
    • aussieguy1234 2 hours ago
      The murder weapon is clearly the only gun around that can shoot ice bullets.
      • robby_w_g 1 hour ago
        Ah but then the murder weapon would melt!
    • zdragnar 14 hours ago
      Concrete's not strong enough to be used as a bullet either- you'd need something roughly the size of a shotgun slug. If you're going that big, you aren't going for subtle.
    • talon8635 13 hours ago
      Wouldn’t there still be evidence that some object penetrated the person and ripped them apart and caused them to bleed out?

      Surely the CIA has untraceable ammo at their disposal already?

    • tomkarho 11 hours ago
      They already have the heart attack gun and half a dozen other gadgets. An ice bullet would be just (pardon the pun) an icing on the cake.
    • gus_massa 15 hours ago
      It's a mix of water and celulose, do it does not disapear completely.
      • anigbrowl 2 hours ago
        For fictional purposes, the ballistic information disappears. You might know the murder victim was shot with an ice bullet, but you won't be able to match it to a specific weapon.
      • Cerium 15 hours ago
        Add some enzymes to help reduce the remaining cellulose?
    • para_parolu 14 hours ago
      Make a bolt and use crossbow
    • jambalaya8 15 hours ago
      I believe they used a different frozen compound than water, but yes.
    • metadat 14 hours ago
      Mythbusters busted ice bullets. IIRC, the ice didn’t tolerate being shot out of a barrel and disintegrated.
      • john_strinlai 14 hours ago
        sounds like a problem that might be solvable by a new super ice that is 10x stronger and "can absorb much more energy and deform gradually" instead of disintegrating.
        • jonhohle 14 hours ago
          Coroners are confused about strange cellulose fibers through the entry and exit wounds. “It looks like they were attacked by… celery.”
        • Gravityloss 14 hours ago
          what if you obtained your target's DNA and grew their flesh to make bullets out of? Add additive, freeze and voila!
          • john_strinlai 14 hours ago
            i think there's an episode of Bones along those lines. maybe it was just a frozen blood bullet? i forget.
  • silverFork 3 days ago
    Ok stronger but doesn't it melt.. What are they going to do with it?
    • patall 16 hours ago
      Ice roads would be one application. Once it freezes, usual ferry services can often no longer be upheld. Then, one has to wait until the ice is thick enough to drive a car over the ice. If there was an easily applicable material to drive on ice less than usual 15-20cm of ice, that would decrease that waiting time quite a bit (and make ice roads/bridges possible in locations that would previously be unsuitable). And since it is ice, you can grow it somewhere else and transport in place with a barge.

      Another is underground tunnel building. In sandy places, there are cases where they freeze the ground when building a concrete structure. If that could be reinforced with stronger ice, it might make working easier.

      Similar, you can use ice as an temporary scaffold when e.g building a spanning bridge in winter. Stronger ice => easier application of said scaffold.

      • gcanyon 1 hour ago
        It always sounds/looks like a trap to me when I hear about/see people driving whole-ass cars over 15cm ~= half a foot of ice. That's just wrong, and I would barely consider walking on ice that thick (thin).

        (I'm telling you I'm from southern California without telling you I'm from southern California)

      • xeonmc 10 hours ago
        Minecraft iceboat racing coming true?
      • hn_throwaway_99 14 hours ago
        This sounds like a Rube Goldberg machine if I've ever heard one, for the nichest of niche applications.
        • patall 14 hours ago
          I am pretty sure that 99.9% of material science covers very niche applications
    • mkotlikov 3 days ago
      "The intended application isn't for aircraft carriers this time, but rather for construction projects in remote, cold areas where conventional building methods aren't easy to apply – like the Arctic and Antarctic.

      With no concrete or steel required, and with ice and plant-based cellulose as the main ingredients, this could be a building material with a low carbon footprint that's also biodegradable."

      • EA-3167 3 days ago
        Climate change feels like a grim reaper slowly stalking the value proposition of this technology.
        • zomiaen 16 hours ago
          Potentially becomes more viable in some locations. Or a future ice age.
      • jazzyjackson 3 days ago
        Maybe we’ll be building ice caves on other planets after all
      • peder 16 hours ago
        Or maybe Mars?
      • moi2388 17 hours ago
        Exactly what I wanted. A biodegradable building. I’m making mine out of compost!
    • fwipsy 1 hour ago
      The original pykrete also melted less easily than pure ice, IIRC the sawdust acts as insulation or something.
    • raisedbyninjas 17 hours ago
      "Further down the line, this approach could open up a whole new landscape for materials used in packaging, construction, and more: Using a custom protein to bring two unlikely compounds (ice and cellulose) together."
    • m463 3 days ago
      warmer igloos obviously. :)
      • blitzar 18 hours ago
        igloo skyscrapers
    • ginko 16 hours ago
  • ozyschmozy 9 hours ago
    The BioPykrete name is kinda funny. As opposed to the regular pykrete, made with the famously not-bio wood pulp
  • bmurphy1976 15 hours ago
    Sounds like a good candidate for shielding an inter-galactic colony ship.
    • aeve890 14 hours ago
      Inter-galactic? My dude I think you missed a few steps
      • bmurphy1976 14 hours ago
        The farther you go, the faster you need to go to get enough time dilation to make the trip worthwhile. The faster you go, the more the shielding matters. It still applies!
        • stronglikedan 13 hours ago
          > The faster you go, the more the shielding matters.

          Unless of course you just bend everything around your private bubble with your warp drive.

  • timonoko 12 hours ago
    Frozen fish is about the same strength as carbon fiber composite. You need carbide saw to cut it.
  • api 18 hours ago
    This type of ice composite would be super interesting for space structure construction. Melt cometary ice and mix it with additives of some kind and spin big cylinders out of it. You’d just have to make the surface reflective so it doesn’t melt, and possibly have some active cooling which you need anyway if anything inside makes heat.

    The outer surface would probably be sprayed with something, maybe just reflective dust, to also keep it from subliming into the vacuum.

    Extremely repairable, melts at human and equipment friendly temperatures, recyclable, doubles as an emergency water reservoir, and last but definitely not least a fantastic radiation shield.

    Would also work for structures on Mars, the Moon, etc, but I’m a fan of the idea of settling space itself not another planet. Gravity wells are a trap.

  • gaiagraphia 18 hours ago
    The article briefly touches on future packaging. Would ice ever be useful in packaging frozen foods? It'd be biodegradable, and would be a sign of trust that the goods have been permanently frozen from packaging to delivery.

    You'd literally be able to just throw the trash outside and let it feed your garden, lol.

    • dublinben 17 hours ago
      The integrity check could also make this especially valuable for transporting medication that must remain cold. The current state of the art isn't much more than putting ice packs in a styrofoam cooler.
  • IshKebab 17 hours ago
    I hate how researchers always have to pretend there's a practical application for their inventions. This is clearly never going to replace concrete in any situation. But it's still interesting.
  • fifilura 18 hours ago
    • hermitShell 17 hours ago
      Another instance of 'Super Ice' or as named in the article 'Pykrete' in science fiction is in Neal Stephenson's Novel from 2015: Seveneves.

      The substance is used in space for the construction of temporary habitats. I suppose this is plausible if you manage to find a large source of ice and bring it into a stable orbit. It won't melt into liquid, and perhaps the reinforcing fibers could help prevent sublimation.

      A lot of the novel strained my ability to suspend disbelief, but the overall scope and ambition is so awesome I was able to forgive the poor editing. It's attempting to be hard sci-fi, much of the novel is taken up by technical descriptions that could only appeal to an engineer-minded person.

      • NitpickLawyer 17 hours ago
        > A lot of the novel strained my ability to suspend disbelief, but the overall scope and ambition is so awesome

        While the 2nd half of the book is definitely still sci-fi territory, the first part is slowly getting into the plausible tech realm, 12 years after the book was written. We now have a much stronger space industry, and probably could match or exceed the payload to orbit in 2 years from the book (if everyone would work towards the same goal, which is still a bit of fantasy but hey...)

        • randallsquared 16 hours ago
          > getting into the plausible tech realm

          Except bringing an asteroid all the way down to the ISS. That part was uncharacteristically thoughtless, I think.

          • hermitShell 16 hours ago
            It basically enabled the plot and mostly happened 'off camera'. The parts about the management of radiation was pretty cool though. Because if it I earmarked "Ichi-F: A Worker's Graphic Memoir of the Fukushima Nuclear Power Plant" to read later on.
        • macintux 16 hours ago
          Side note, but I have a hard time thinking of Seveneves in halves; isn't it 3 distinct parts?

          Mainly I remember skimming the middle third because it felt like such a drag.

          • doginasuit 16 hours ago
            You could cleanly think about it in three parts, but the time jump in the middle which involves a whole new set of characters is another way to split it.
          • rtkwe 16 hours ago
            Yes the book itself is broken into 3 parts but if you're looking at it from a scientific plausibility scale parts 1 & 2 are in the same vicinity of that scale where part 3 jumps a good ways into more traditional scifi levels of plausibility.
          • NitpickLawyer 16 hours ago
            Heh, true. My brain went into "pre space" and "post space" as halves :)
      • 8note 15 hours ago
        pykrete isnt a scifi material. its a ww2 idea the brits had for making an ice based aircraft carrier
    • Zambyte 18 hours ago
      The Wikipedia article mentions how this happened with an anti-AIDS medication called ritonavir. I watched this video by Veritasium on that situation a while back; I recommend it: https://www.youtube.com/watch?v=ksn5yrsC3Wg
    • thinkingtoilet 14 hours ago
      I literally picked up Cat's Cradle for first time in decades this weekend. Funny how these things line up.
  • bloke_zero 18 hours ago
    Ice nine!
    • cgriswald 14 hours ago
      What is Ice 362880?

      (I’m sorry.)