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This story isn't really about carbon fiber... it's about finding a way to recycle thermosetting plastics. Carbon fiber is just the click bait. If they can indeed depolymerize thermoset plastics. (Which are hard and brittle, thus useful when in composite with something strong in tension like carbon fiber), it would be an over all good.
This story isn't really about carbon fiber... it's about finding a way to recycle thermosetting plastics. Carbon fiber is just the click bait. If they can indeed depolymerize thermoset plastics. (Which are hard and brittle, thus useful when in composite with something strong in tension like carbon fiber), it would be an over all good.
I was about to write the same thing. Making carbon fiber itself is a mastery class in non-renewable and non-recyclable materials. But it enables a lot of the lightweight “green” things people can pat themselves on the back for, which is the majority of the point for many. Better epoxies would help, but we’re quite a ways off.
This may make it so carbon fiber items could be repaired as the epoxy can be removed and reapplied. Being able to repair goods is much better for the environment than being able to recycle them.
My experience with carbon fiber is mostly in cycling. One of the drawbacks with carbon fiber is its tendency to fail catastrophically. By that I don't mean that it tends to fail per se, but when it does it often doesn't do so gradually with warning like steel or aluminum (which warps, dents, and/or cracks visibly). So there's a certain fear about hidden cracks and failure points. This gets exacerbated when talking ab…
The bigger issue with carbon (in the context of cycling) is that there can be significant fabrication defects (voids) that are impossible to detect without special equipment. On aluminium frames you really only have to look and the welds to see if there are defects. Together with the fact that most (even premium brands like trek, canyon...) manufacture ultra cheap in China with very little QC (due to the race to the bottom regarding costs) , means you could get a significantly weakened frame straight from the dealer.
This story isn't really about carbon fiber... it's about finding a way to recycle thermosetting plastics. Carbon fiber is just the click bait. If they can indeed depolymerize thermoset plastics. (Which are hard and brittle, thus useful when in composite with something strong in tension like carbon fiber), it would be an over all good.
FWIU flax and hemp are more sustainable and potential substitutes for carbon fiber, which is industrially hazardous to produce? The branching structure makes e.g. hemp bast fiber ideal for supercapacitor (~battery) anodes. How does this plant-based epoxy affect conductivity and resistivity in various materials in various outdoor conditions with and without a coating? If it's plant-based, is it safe next to plenum cab…
Fyi, Fiber Melting points: Hemp: 150 c Flax, saline treated: 153 c Basalt: 1,500 c Carbon: 3652 c
Are (coated) biocomposite resin melting points higher and comparably acetone-resistant?
FWIU flax and hemp are more sustainable and potential substitutes for carbon fiber, which is industrially hazardous to produce? The branching structure makes e.g. hemp bast fiber ideal for supercapacitor (~battery) anodes. How does this plant-based epoxy affect conductivity and resistivity in various materials in various outdoor conditions with and without a coating? If it's plant-based, is it safe next to plenum cab…
> potential substitutes When I can order sheets of hemp fiber pre-preg and a recyclable epoxy I’ll get my company to use it same day. Here I am holding my breathe, because I’m not sure what you heard but an organic fiber will never be as thin, strong, uniform as curated carbon thread that was produced specially for this purpose.
From https://motonetworks.com/worlds-greenest-car-somebody-made-c... :
> It’s actually made using hemp fibers that have been woven together and then sealed and finished with as super hard resin. And once it’s completed you have an insanely strong material that makes steel look weak and brittle. It’s reported to be as much as ten times stronger than steel, yet is lighter than fiberglass.
> The Renew Sports Car was recently featured on an episode of Jay Leno’s Garage [...]*
> Dietzen got the idea from none other than Henry Ford who back in 1941 advocated that Ford should build everything they possibly could out of plant material. Which makes sense because that’s obviously going to drastically reduce material costs which should in turn, reduce the overall price of the car. And thanks to modern technology, Dietzen managed to figure out how to make it all work. If this catches on to the mainstream it could revolutionize the automotive industry across the board. He says that it takes roughly 100lbs of cannabis plants to make a car, which sounds like a lot, but when compared to how much steel and other metals used to create current automobiles that’s just a drop in the bucket.
"Is Hemp Really Stronger Than Steel? How?" re: Tensile Strength and Compression Strength exceeded that of {steel, aluminum, } https://hempfoundation.net/is-hemp-really-stronger-than-stee...
Do high carbon steel rockers rust after a couple years of average road salt?
Which carbon fibers are least health-hazardous to produce?
This may make it so carbon fiber items could be repaired as the epoxy can be removed and reapplied. Being able to repair goods is much better for the environment than being able to recycle them.
My experience with carbon fiber is mostly in cycling. One of the drawbacks with carbon fiber is its tendency to fail catastrophically. By that I don't mean that it tends to fail per se, but when it does it often doesn't do so gradually with warning like steel or aluminum (which warps, dents, and/or cracks visibly). So there's a certain fear about hidden cracks and failure points. This gets exacerbated when talking ab…
Earlier quoted context omitted.
> potential substitutes When I can order sheets of hemp fiber pre-preg and a recyclable epoxy I’ll get my company to use it same day. Here I am holding my breathe, because I’m not sure what you heard but an organic fiber will never be as thin, strong, uniform as curated carbon thread that was produced specially for this purpose.
There are Hemp alloys. From https://motonetworks.com/worlds-greenest-car-somebody-made-c... : > It’s actually made using hemp fibers that have been woven together and then sealed and finished with as super hard resin. And once it’s completed you have an insanely strong material that makes steel look weak and brittle. It’s reported to be as much as ten times stronger than steel, yet is lighter than fiberglass. > The R…
You want to know how you can quickly tell this is all bullshit?
Steel isn’t brittle. Not in any relative sense to composites. Saying something is weak and brittle… that’s dry spaghetti. Does steel failure remind you of that? Or does composite failure seem closer?
Carbon is brittle. Composites are brittle. Hemp with epoxy is going to be brittle,all relative to steel which has plenty of pliability to it.
Are you sure you know enough about composites to repeat these hemp claims? Because if “makes steel look weak and brittle” didn’t immediately flag for you, you either know a lot more than I’ve learned in 20 years of working around composites and manufacturing or you don’t and just want hemp to be cool.
Hemp might be amazing. But you are posting nonsense that it seems like you have some desire to believe for some reason.
Sure maybe it’ll get out of the lab just around the same time graphene does.
Earlier quoted context omitted.
There are Hemp alloys. From https://motonetworks.com/worlds-greenest-car-somebody-made-c... : > It’s actually made using hemp fibers that have been woven together and then sealed and finished with as super hard resin. And once it’s completed you have an insanely strong material that makes steel look weak and brittle. It’s reported to be as much as ten times stronger than steel, yet is lighter than fiberglass. > The R…
> It’s actually made using hemp fibers that have been woven together and then sealed and finished with as super hard resin. And once it’s completed you have an insanely strong material that makes steel look weak and brittle. You want to know how you can quickly tell this is all bullshit? Steel isn’t brittle. Not in any relative sense to composites. Saying something is weak and brittle… that’s dry spaghetti. Does stee…
If this were OT, we could reference ScholarlyArticles which describe experiments which return scalar intervals for: Tensile and Compressive Strength, Melting point / deployed heat resistance, production cost in real dollars, carbon cost (reduction in carbon tax credits because unnecessary with alternate sustainable inputs), resistance to corrosion due to sodium chloride, [in-space without water] repairability, magnetizability, water transport and filtration cost, and other factors; with a fair standard panel for relative comparison.