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Renewable and Biodegradable Polyurethane Foams with Aliphatic Diisocyanates
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Researchers developed high-performance polyurethane foams using renewable aliphatic diisocyanates and bio-based furan dicarboxylic acid polyols, demonstrating that the resulting materials meet commercial performance tolerances and can biodegrade under backyard compost conditions, offering a viable path toward fully renewable polyurethane production.
The transition to renewable plastics will require the development of substitutes with existing industrial standards and manufacturing processes. Polyurethanes (PU), versatile plastics, are traditionally dominated by aromatic diisocyanates, which are challenging to derive from renewable sources. However, for higher biocontent, it is crucial to utilize aliphatic diisocyanates, which can be sourced from renewable plant or algae waste streams. Historically, PU foams relied on aromatic diisocyanates for essential hard segments, resulting in desired physical properties. Here, we report the generation of high-performance renewable and biodegradable PU foams utilizing aliphatic diisocyanates and aromatic polyols, translating hard segments into the polyester polyol component using biosourced furan dicarboxylic acid (FDCA) monomers. We demonstrate that an FDCA-based PU is suitable for foams with performance characteristics that meet commercial tolerances and can biodegrade under backyard compost conditions. This demonstrates steps toward redesigning traditional petrochemical-based polymers to accommodate new biological monomers.
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Synthesis and Biodegradation Test of a New Polyether Polyurethane Foam Produced from PEG 400, L-Lysine Ethyl Ester Diisocyanate (L-LDI) and Bis-hydroxymethyl Furan (BHMF)
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Researchers synthesized a bio-based polyether-polyurethane foam using PEG 400, lysine-derived diisocyanate, and a furan-derived diol, and tested its biodegradation rate, aiming for a more environmentally friendly alternative to conventional polyurethane foams. The use of renewable and amino acid-derived building blocks offers a pathway toward biodegradable plastic foam materials.
Rapid biodegradation of renewable polyurethane foams with identification of associated microorganisms and decomposition products
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Researchers formulated biodegradable polyurethane foams from algae-derived polyols that meet commercial footwear standards and lost up to 71% of their mass in soil within 12 weeks. Isolated microorganisms capable of using polyurethane as a sole carbon source were identified as key drivers of breakdown.
Sustainable and biodegradable polymeric foams: Processing–structure–property relationships, scalability, and circular design perspectives
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This review paper takes stock of new plant-based and biodegradable foam materials, like those made from cellulose and plant sugars, that could replace traditional petroleum-based foams used in packaging and insulation. These greener alternatives break down more easily instead of persisting in the environment as plastic waste and microplastics, though the research shows some, like bio-based polyurethane foams, are still hard to recycle due to their chemistry. While scientists have made real progress, especially with super-insulating cellulose foams, the paper notes that cost, scalability, and further innovation (including AI-assisted design) are still needed before these materials show up widely
Novel Bio‐Based Polyurethane Elastomers Customizable for Orthopedic Devices: Toughness, Rapid Degradability, and Safety
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Researchers synthesized novel bio-based polyurethane elastomers achieving 82% enzymatic degradation in 20 days and 95.5% compost degradation in 90 days, with mechanical properties comparable to petroleum-based elastomers and confirmed non-biotoxicity. Rapidly biodegradable polymers with strong mechanical performance are highly significant for microplastic pollution reduction, as they could replace persistent synthetic polymers that fragment into long-lived microplastic particles.
PUR-GEN: A web server for automated generation of polyurethane fragment libraries
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Researchers developed PUR-GEN, a web server that automates the generation of polyurethane fragment libraries for computational biodegradation research, allowing users to create combinatorial oligomer libraries from isocyanate and alcohol inputs. A case study using the tool to dock 414 generated oligomers against four cutinases and three urethanases demonstrates its utility for discovering PUR-degrading enzymes.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.