[HN Gopher] Producing graphene in bulk using waste food, plastic...
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Producing graphene in bulk using waste food, plastic and other
materials
Author : anchpop
Score : 31 points
Date : 2022-03-02 21:21 UTC (1 hours ago)
(HTM) web link (news.rice.edu)
(TXT) w3m dump (news.rice.edu)
| Gravityloss wrote:
| Awesome!
|
| I wonder if the walls are made of graphene reinforced concrete,
| if I drill some holes, how dangerous is it?
| zdragnar wrote:
| With or without graphene, if you're drilling holes into
| concrete without a mask, you're gonna have a bad time. Rock
| dust, mineral dust, even wood dust from a saw are all
| carcinogens when inhaled.
|
| I imagine the danger isn't significantly increased unless the
| graphene is layered thickly enough that the concrete doesn't
| bond all the way through it. Either you're worried about
| concrete dust, or you are worried about graphene dust. Concrete
| dust with bonded bits of graphene are going to be the same
| physical size as concrete, so I wouldn't expect it to be
| significantly more dangerous combined.
| Gravityloss wrote:
| Of course I'm wearing a mask when drilling into a concrete
| wall. Nevertheless the question stays.
| agumonkey wrote:
| some people working in the field said it wasn't proven to be
| graphene (disagreement on methodology basically) and that it
| wasn't replicated
| croes wrote:
| Is it a good idea to burn food instead of turning it to compost?
| hosh wrote:
| That was my thought too. There's some hard-to-compost stuff ...
| but I think those are still more valuable as biochar than
| graphene, from an ecological perspective.
|
| The flip side is, I wonder if this could be scaled down to a
| home device for processing plastics. It doesn't even have to
| produce graphene.
| emteycz wrote:
| Where do you live that compost is less available than
| graphene? I'd love to move there, it's a wonder material that
| seems close to magic and I'd love to use it for my tech
| products. Where I live, there are absolutely zero risks
| whatsoever of running out of compost even if we converted
| _all_ disposed food to graphene - but were very much lacking
| graphene, especially of the cheap and large scale variety.
| turnerc wrote:
| [2020]
|
| Ben from NightHawkInLight has a good "DIY" video on this:
| https://www.youtube.com/watch?v=4Et8FEbCuCs
| trhway wrote:
| there is even a similar DIY, only using microwave generated
| flash, on producing a [very small] artificial diamond from
| graphite by what basically is CVD method
| https://www.instructables.com/How-to-Make-a-Synthetic-Diamon...
| which most probably would work for any source of carbon (the
| people who don't like the low tech look of it may google for
| respected scientific labs doing similar :)
| hosh wrote:
| I got mixed feelings about this. Food waste is valuable as
| compost and can be put back into the carbon cycle, and I think
| that is far more valuable than graphene in terms of ecology,
| rather than the market.
|
| Plastic, on the other hand, just sits there and we have not been
| able to put it back into the carbon cycle. Turning them into an
| advanced material like graphene is great.
| Retric wrote:
| Climate change is all about excess carbon, it ultimately
| doesn't matter where it's coming from.
| betwixthewires wrote:
| There's an easy way to put plastic back into the carbon cycle:
| burn it.
| janj wrote:
| Food waste ending up in the landfill is bad, produces large
| amounts of methane. I imagine there will always be streams of
| food waste that need to be diverted out of the landfill. In CA
| you're no longer allowed to throw food waste in the trash bin,
| it must be composted. I don't think that option is available
| everywhere. Having a variety of options should help divert food
| from ending up in a landfill.
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