[boffinAudio]

This is a great idea .. I wonder if it can be adapted to using recycled plastic threads, so that a fleet of these could be deployed into the ocean to recover plastics, turn them into nets, and use those nets to .. recover more plastic?

If I were shipwrecked on a tropical island, I'd make it my daily task to work out how to build something like this, into which I can feed plastic bottles, and get a brand new material that could be used for more construction.

Sure, knitting scarves is neat. But knitting a weather-proof shelter? Hell yeah!

[jnovacho]

To recycle plastic, the only viable way is to melt it. And the plastic must be very clean before it can be remelted. If it even is a kind of plastic that can be reheated multiple times. I am afraid the short answer is no.

[boffinAudio]

In the context of ocean plastic recovery/harvesting, I don't know that the purity is all that important - the more important factor is, collection. Being able to take plastic bottles and turn them into a kind of string, for example, seems more viable - if a hopper could be designed which takes a plastic bottle, rotates it around a stripping knife, and the output is a long twine - this could then be fed into the knitting machine.

I imagine this rube-goldberg'esque strandebeest-like contraption sitting out there harvesting wind and waves, slowly turning every bottle it gorges on into a finely woven matte of materials .. maybe even reproducing itself, who knows ..

EDIT: I asked Grok to design a self-replicating ocean weaver, and I have to say .. it seems like a viable idea to me. Perhaps we will see this kind of plastic harvesting in the near future .. at the very least, were I to be stranded on a plastic-laden island, I'm pretty sure I could work out a way to build a raft with sails ..

[Cthulhu_]

There's some (fairly simple) devices in use or that you can make yourself to turn bottles into a kind of thread, but it's very hard to automate because bottles will be different in shape and condition.

But as you say, turning them into something else isn't the critical part, collecting them in the first place is. The most important thing is taking them out of the environment so they stop breaking down into microplastics and the like.

Personally I think all these creative solutions for reusing plastics aren't so important. Collect it and put it in a giant landfill like an old open mine, bury it and forget about it until a future generation invents an efficient way to recycle it, then mine it like a resource.

[lawlessone]

> I asked Grok

I asked Grok and it said you didn't ask it.

[boffinAudio]

Your Grok and my Grok should meet.