A concise strategy for enhancing the performance of bio-based polyurethane aerogels using melamine-modified sodium alginate via Aza-Michael addition reaction

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 157361 - 157361

Published: Nov. 1, 2024

Language: Английский

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High-Strength Polyurethane-Reinforced Glass Fiber Spacer Fabric for Cost-Effective, Lightweight, and High-Temperature Insulation Applications

Composites Communications, Journal Year: 2025, Volume and Issue: unknown, P. 102270 - 102270

Published: Jan. 1, 2025

Language: Английский

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Study on the preparation and properties of lignin-based flexible polyurethane foams with NaCl as a medium

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: 302, P. 140370 - 140370

Published: Feb. 1, 2025

Language: Английский

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Sustainable synthesis of waste soybean oil-based non-isocyanate polyurethane elastomers and foams

Polymer, Journal Year: 2025, Volume and Issue: 323, P. 128217 - 128217

Published: March 1, 2025

Language: Английский

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Raw materials, preparation methods, flame retardant properties and applications of bio-based flame retardant polyurethanes: Research progress and challenges

European Polymer Journal, Journal Year: 2025, Volume and Issue: 232, P. 113965 - 113965

Published: April 25, 2025

Language: Английский

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Waste-Cooking-Oil-Derived Polyols to Produce New Sustainable Rigid Polyurethane Foams

Sustainability, Journal Year: 2024, Volume and Issue: 16(21), P. 9456 - 9456

Published: Oct. 31, 2024

Polyurethanes (PUs) are one of the most versatile polymeric materials, making them suitable for a wide range applications. Currently, petroleum is still main source polyols and isocyanates, two primary feedstocks used in PU industry. However, due to future price uncertainties need eco-friendly alternatives, recent efforts have focused on replacing petrol-based isocyanates with counterparts derived from renewable resources. In this study, waste cooking oil was as feedstock obtain (POs) new sustainable polyurethane foams (PUFs). POs various hydroxyl numbers were synthesized through epoxidation followed by oxirane ring opening diethylene glycol. By adjusting reagent amounts (acetic acid H2O2), epoxidized oils (EOs) different degrees (50–90%) and, consequently, OH (200–300 mg KOH/g) obtained. Sustainable PUFs high bio-based content produced mixing commercial partially aliphatic isocyanate using water blowing agent presence gelling catalyst additives. Various (4, 8, 15 php) (0, 1, 2 tested assess their effect foam properties. also prepared EOs instead investigate potential use directly PUF production. Characterization included morphological, chemical, physical, thermal, mechanical analyses. The rigid exhibited density (150–300 kg/m³) stability up 200 °C. combined enabled 77 wt.%. demonstrated production bypassing second synthesis step, enhancing sustainability, significantly reducing energy costs; however, formulations require optimization lower epoxy reactivity.

Language: Английский

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A novel efficient liquefaction process for corn starch through ternary deep eutectic solvent: Products characterization and liquefaction mechanism

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 289, P. 138929 - 138929

Published: Dec. 18, 2024

Language: Английский

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Modification of degradable polyurethane materials using L-tyrosine and its application

Journal of Polymer Research, Journal Year: 2024, Volume and Issue: 32(1)

Published: Dec. 30, 2024

Language: Английский

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