Don't just toss that plastic food container in the garbage!
The
problem with plastics is that once they come into existence, they
don't really just go away. This is great for things like electronics
casings, reusable food containers and guitar parts, but when it comes
to disposable packaging, not so much. Your average petroleum-based
plastic clogs landfills and uses up valuable fossil fuel resources
that could be either saved or put to use elsewhere. Even the most
popular biorenewable plastic, polyactide, has to be rendered down in
industrial facilities, adding to its overall cost.
Researchers
at Imperial College London set out to create a real
biorenewable plastic that didn't require a lot of energy to
create or destroy and didn't use active food crops as a source of
material. Their new polymer material is made from sugars called
lignocellulosic biomass. This type of biomass can come from anything
from non-food crops to agricultural waste to saw mill discards.
The
process to make the new plastic has taken the group, led by Professor
Molly Stevens of ICL, three years to bring up to 80% efficiency. But
where polyactide requires a large amount of energy and water to
produce, the ICL plastic is the opposite. Further, polyactide uses
food crop like corn and sugar beet for its prime ingredients, causing
concern from many over the use of viable food sources in creating
non-edible products.
But the best part about the ICL plastic
is that it doesn't require any high energy process to break down. Its
oxygen-rich structure absorbs water and biodegrades the structures
into harmless components. This means to safely discard the material,
all a consumer has to do is toss it on their compost pile. And if you
don't have a compost pile, that's fine -- it will breakdown just as
well in a landfill if exposed to the elements.
This plastic
doesn't only show promise for packaging materials though. A group of
several parties, including at least one commercial entity, brought
together by Stevens is looking into ways the polymer may be useful in
medical capacities such as stitches and tissue regeneration
scaffolding. Another use may be controlled drug delivery as the
plastic also breaks down into harmless compounds in the body.
"A politician stumbles over himself... Then they pick it out. They edit it. He runs the clip, and then he makes a funny face, and the whole audience has a Pavlovian response." -- Joe Scarborough on John Stewart over Jim Cramer
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