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New plant-based plastics can be chemically recycled with near-perfect efficiency

academictimes.com

61–70 of 272 posts

Re: New plant-based plastics can be chemically recycled with near-perfect efficiency

#61

Earlier quoted context omitted.

Plastic disposal is a clear example of the failure of current economics. It's clearly bad for the environment and has long term costs, but there basically isn't any way economics to calculate that or incent it to not be done. So IMO, recycling is an exploratory exercise in seeing if we can socially engineer behavior that is "better". The cynic would say "it doesn't", but I could argue civilization is built on short t…

90% of ocean plastic comes from Asia and Africa: http://odinafrica.org/about-us/news/217-90-percent-of-ocean-... . We need to prohibit Western companies from packaging food and FMCG for the developing world in plastic - until both the disposal infrastructure and societal attitudes around pollution and environmental management change. Or, charge those polluters to build that infrastructure or change those attitudes. H…

That's only because we were sending plastics to them to 'reprocess', and when those countries banned it, we were dumping it there illegally:

https://www.theguardian.com/world/2019/may/29/malaysia-to-se...

Re: New plant-based plastics can be chemically recycled with near-perfect efficiency

#62

Earlier quoted context omitted.

I believe plastic recycling is not motivated by oil use primarily. I believe it is motivated by trash accumulation in oceans and the food chain (microplastics). There are a ton of areas of the world where plastic just piles up.

Off-topic, but sometimes I feel like we could harvest the plastic from the ocean, make plastic bricks, and build millions of houses. Edit: Just to be clear, I’m not trying to say that this is a viable solution to anything, or that it’s a good use of resources based on our current methodologies. I’m more just trying to say that there’s so much raw material out there and that it’s better if it comes out of the ocean. L…

Or... we could not use so much plastic, and make actual bricks to build ‘millions of houses’.

Since you sound so excited, are you going to live in the first plastic house with your family?

I think suggestions like this are super demeaning. I often see them coming from privileged knowledge workers, who are eager to share ‘free ideas‘/psuedo-solutions as a sort of ‘charity’ for poor people (and people in the global south). They are also often strategies which somehow don’t seem to fit for their own life - and instead are for ‘others’ who are less well off.

In other words: tech solutionism.

As knowledge workers, let’s try to cut through our false consciousness and come up with some awesome systemic changes that kick butt.

Re: New plant-based plastics can be chemically recycled with near-perfect efficiency

#63
post #53

Earlier quoted context omitted.

I think we should recycle plastic if we can, or better yet, switch to other materials that are easier to recycle. For example, glass bottles can just be sent back to the factory, washed and reused. This is already done for beer and wine AFAIK. It could be done for milk and every other kind of drinks as well. However, if we fail to recycle plastic, isn't burying plastic in a landfill, in a way, a form of carbon captur…

My mother used to say this happened with milk. They'd deliver it daily and collect the used bottles to be washed and reused.

This is still done today with some premium milk in the US - e.g. Strauss milk: https://www.strausfamilycreamery.com/simple-faqs/what-should...

Re: New plant-based plastics can be chemically recycled with near-perfect efficiency

#64

Plastic recycling seems heavily motivated by emotion and virtue signaling. In reality, only about 5% of our crude oil use goes towards plastic. If we rolled out EVs, and then just burned all the plastic trash (using waste-to-energy plants), we would still be far ahead. The biggest challenges with plastics are hormone disruption, and microplastics (particularly in the 3rd world without sufficient landfill or W2E infra…

> Only about 5%

Perhaps. But 5% of gazillions is still bazillions. Bazillions of non-biodegradable goods - many single use - adds up. Forever.

Presuming oil follows the same path as coal (i.e., demand collapses and price follows) then plastics will get even cheaper. If we don't find an alternative soon, it might never happen.

Re: New plant-based plastics can be chemically recycled with near-perfect efficiency

#65

Earlier quoted context omitted.

I believe plastic recycling is not motivated by oil use primarily. I believe it is motivated by trash accumulation in oceans and the food chain (microplastics). There are a ton of areas of the world where plastic just piles up.

Off-topic, but sometimes I feel like we could harvest the plastic from the ocean, make plastic bricks, and build millions of houses. Edit: Just to be clear, I’m not trying to say that this is a viable solution to anything, or that it’s a good use of resources based on our current methodologies. I’m more just trying to say that there’s so much raw material out there and that it’s better if it comes out of the ocean. L…

Most of the plastic can not be practically recovered from the ocean. It's more of a publicity stunt and cleaning hotspots.

We need to catch the plastics before they go into the environment, disintegrate, release their plasticizers and other toxins.

As has been said, best way to deal with all the plastic garbage that contains who-knows-what would probably be fuel, feedstock in refineries or similar.

Re: New plant-based plastics can be chemically recycled with near-perfect efficiency

#67
"The one disadvantage of the new materials Mecking identified was their cost."

Oops.

Biodegradable plastics are available. They're useful for things likely to be discarded with ordinary trash, like food packaging. Some are made from starches.

Re: New plant-based plastics can be chemically recycled with near-perfect efficiency

#68

Earlier quoted context omitted.

I believe plastic recycling is not motivated by oil use primarily. I believe it is motivated by trash accumulation in oceans and the food chain (microplastics). There are a ton of areas of the world where plastic just piles up.

Off-topic, but sometimes I feel like we could harvest the plastic from the ocean, make plastic bricks, and build millions of houses. Edit: Just to be clear, I’m not trying to say that this is a viable solution to anything, or that it’s a good use of resources based on our current methodologies. I’m more just trying to say that there’s so much raw material out there and that it’s better if it comes out of the ocean. L…

Your edit is where the problem is. Sure there is a lot of plastic in the ocean, but the ocean is big as well. As a whole the size of the ocean cancels out your attempts to do any recovery. You end up using more energy to power the filters (which are typically on ships) than you would by taking the oil powering the filters and directly turning it into plastic.

Plastic in the ocean isn't an easy problem to solve with anything other than wait for it to degrade. Which isn't as bad as it sounds because plastic doesn't do well in the sun, and we can easily make plastics that do worse and thus degrade faster.

Re: New plant-based plastics can be chemically recycled with near-perfect efficiency

#69

Earlier quoted context omitted.

Off-topic, but sometimes I feel like we could harvest the plastic from the ocean, make plastic bricks, and build millions of houses. Edit: Just to be clear, I’m not trying to say that this is a viable solution to anything, or that it’s a good use of resources based on our current methodologies. I’m more just trying to say that there’s so much raw material out there and that it’s better if it comes out of the ocean. L…

Or... we could not use so much plastic, and make actual bricks to build ‘millions of houses’. Since you sound so excited, are you going to live in the first plastic house with your family? I think suggestions like this are super demeaning. I often see them coming from privileged knowledge workers, who are eager to share ‘free ideas‘/psuedo-solutions as a sort of ‘charity’ for poor people (and people in the global sou…

Demeaning or proposing ‘charity’ was not my intent at all.

I’ve edited my comment to clarify the subtext, but to answer your question: if we could find a health-safe fire and UV-resistant plastic formula that made solid building materials out of the pollution in the ocean, I would definitely live in the first plastic house with my family. It could survive hundreds of years and have a lot of benefits.

Re: New plant-based plastics can be chemically recycled with near-perfect efficiency

#70
post #46

Earlier quoted context omitted.

Off-topic, but sometimes I feel like we could harvest the plastic from the ocean, make plastic bricks, and build millions of houses. Edit: Just to be clear, I’m not trying to say that this is a viable solution to anything, or that it’s a good use of resources based on our current methodologies. I’m more just trying to say that there’s so much raw material out there and that it’s better if it comes out of the ocean. L…

You also need to make it fireproof or use an outer layer of fireproof material.

I’ve edited my comment to clarify the subtext, but yes you’d definitely need to make it fireproof. Fiery liquid plastic is exceptionally unpleasant.
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