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PBAT is biodegradable but what about the toxicity of its biodegradation products?
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Researchers used density functional theory (DFT) computations to assess the toxicity of biodegradation products from PBAT, a widely used biodegradable plastic, analyzing electron-donating and electron-accepting properties to evaluate potential chemical hazards as the material breaks down in the environment.
All DFT computations were performed using the Gaussian16 at M062x/6-311 + g(2d,p) level of theory without symmetry constraints. Electro-donating (ω-) and electro-accepting (ω +) powers were used as response functions.
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The Controversy Surrounding the Toxicity of Biodegradable Plastics: PBAT as a Case Study
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Researchers used computational chemistry to analyze whether biodegradation products of the biodegradable plastic PBAT could interact with DNA base pairs and potentially cause toxicity. They found that all PBAT degradation products formed stable complexes with guanine-cytosine base pairs, suggesting potential toxicity at the molecular level. The results are consistent with previous research indicating that PBAT degradation products may actually be more toxic than the intact PBAT microplastics themselves.
Abiotic degradation of PBAT and LDPE: quantification of generated products by carbon assessment
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Researchers conducted a comprehensive carbon-based quantification of all abiotic degradation products generated when industrial PBAT (a biodegradable polyester) and LDPE (a conventional polyester) pellets were exposed to environmental conditions, characterising microplastic fragments, soluble molecules, and volatile compounds. The study provides the first complete carbon-balance assessment of plastic degradation outputs for these polymers, offering a framework for understanding the full scope of plastic fragmentation pollution.
Recent advances in poly(butylene adipate-co-terephthalate) (PBAT): structure, modification strategies, degradation, and sustainable applications
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This review paper rounds up what scientists currently know about PBAT, a biodegradable plastic being used in food packaging, farm films, and even medical devices as an alternative to traditional plastics that never break down. While PBAT does degrade in soil and water more effectively than conventional plastic, the research notes a catch worth watching: it can still shed microplastics during the breakdown process, meaning "biodegradable" doesn't automatically mean risk-free for ecosystems or human exposure. More research is needed to make sure these materials fully break down safely before they become a bigger part of everyday products.
Generation and characterization of secondary nanoplastics and oligomers from PBAT and their toxicity towards the freshwater microalga C. reinhardtii
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Researchers generated and characterized secondary nanoplastics and oligomers from biodegradable PBAT plastic to assess their ecotoxicological effects compared to conventional plastic counterparts. The study found that biodegradable plastics also release nanoscale particles with measurable toxic effects.
Recent Advances in PBAT (Nano) Composite Materials for Food Packaging: A Comprehensive Review
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This review surveys advances in PBAT-based biodegradable nanocomposites for food packaging, covering fabrication methods and nanofillers that improve the mechanical strength, barrier properties, and antimicrobial performance of this promising sustainable alternative to conventional plastic packaging.
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