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To Design Truly Compostable Plastic, Scientists Take Cues From Nature


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To Design Truly Compostable Plastic, Scientists Take Cues From Nature
Ivan Jayapurna, a UC Berkeley materials science and engineering graduate student, preparing a sample film of a new biodegradable plastic. (Credit: Adam Lau/UC Berkeley)
Despite our efforts to sort and recycle, less than 9% of plastic gets recycled in the U.S., and most ends up in landfill or the environment.
Biodegradable plastic bags and containers could help, but if they’re not properly sorted, they can contaminate otherwise recyclable #1 and #2 plastics. What’s worse, most biodegradable plastics take months to break down, and when they finally do, they form microplastics – tiny bits of plastic that can end up in oceans and animals’ bodies – including our own. ....

Corinne Scown , Le Ma , Zhiyuan Ruan , Aaron Hall , Ivan Jayapurna , Christopher Delre , Berkeley Ivan Jayapurna , Tim Li , Kyle Zolkin , Tom Russell , Yufeng Jiang , Robert Ritchie , Junpyo Kwon , Philjun Kang , University Of Massachusetts , Us Department Of Defense , Laboratory Directed Research , Office Of Science , Berkeley Lab Advanced Light Source , Berkeley Lab , Berkeley Lab Materials Sciences Division , Lawrence Berkeley National Laboratory , Materials Sciences Division , Energy Analysis , Environmental Impacts Division , Energy Technologies ,

New process makes 'biodegradable' plastics truly compostable


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IMAGE: A modified plastic (left) breaks down after just three days in standard compost (right) and entirely after two weeks.
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Credit: Christopher DelRe, UC Berkeley
Biodegradable plastics have been advertised as one solution to the plastic pollution problem bedeviling the world, but today s compostable plastic bags, utensils and cup lids don t break down during typical composting and contaminate other recyclable plastics, creating headaches for recyclers. Most compostable plastics, made primarily of the polyester known as polylactic acid, or PLA, end up in landfills and last as long as forever plastics.
University of California, Berkeley, scientists have now invented a way to make these compostable plastics break down more easily, with just heat and water, within a few weeks, solving a problem that has flummoxed the plastics industry and environmentalists. ....

United States , Corinne Scown , Stephanie Mcelhinny , Le Ma , Zhiyuan Ruan , Aaron Hall , Ivan Jayapurna , Thomas Russell , Christopher Delre , Tim Li , Kyle Zolkin , Yufeng Jiang , Robert Ritchie , Junpyo Kwon , Philjun Kang , University Of Massachusetts , University Of California , Army Research Office , Department Of Defense Army Research Office , Berkeley Lab , Us Department Of Energy , Combat Capabilities Development Command , Army Research , Bakar Fellowship , ஒன்றுபட்டது மாநிலங்களில் , லெ மா ,