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The holy grail of plastic? Scientists create material that can be recycled over and over again
Key Excerpts from Article on Website of The Independent (One of the UK's leading newspapers)
Posted: May 20th, 2019
https://www.independent.co.uk/news/science/scientists-berkel...
The holy grail of plastic a material that can be repeatedly recycled without any loss of quality has been created by scientists. Placed in an acid bath, it can be fully broken down into its component parts. Like lego, these monomers can then be reassembled into different shapes, colours and textures, according to the scientists at Californias Lawrence Berkeley National Laboratory who created it. Currently, less than a third of recyclable plastic is re-purposed to create new materials, leaving the majority of it to end up in landfill or the ocean. The new material called poly (diketoenamine) or PDK can, unlike normal plastics, have its monomers separated by dunking the material in a highly acidic solution. The acid breaks the bonds between monomers and separates them from additives that give the plastic its distinctive look and feel. These monomers can be recovered for reuse for as long as possible, or upcycled to make another product. Were interested in the chemistry that redirects plastic lifecycles from linear to circular. We see an opportunity to make a difference for where there are no recycling options, said Brett Helms, a staff scientist in Berkeley Labs Molecular Foundry. Dr Helms added: With PDKs, the immutable bonds of conventional plastics are replaced with reversible bonds that allow the plastic to be recycled more effectively. The research team believe their recyclable plastic could be an alternative to non-recyclable plastics in use today.
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