Integrating biodegradable polyesters in a circular economy

Current Opinion in Green and Sustainable Chemistry, Journal Year: 2022, Volume and Issue: 40, P. 100751 - 100751

Published: Dec. 29, 2022

This review presents an overview of recent scientific developments and innovations aiming to integrate biodegradable polyesters into the circular economy. We especially concentrate on development different end-of-life management options for including mechanical, chemical organic recycling (composting or biodegradation in specified environments). Polymer materials general are crucial sustainable development, but we need rethink redesign incorporate them material flows. Biodegradable have all prerequisites become fully compatible with principles The balanced properties, well-defined application-dependent routes will be a step forward reduce eliminate plastic waste accumulation.

Language: Английский

---

Upcycling Waste Polycarbonate to Poly(carbonate imine) Vitrimers with High Thermal Properties and Unprecedented Hydrolytic Stability

ACS Sustainable Chemistry & Engineering, Journal Year: 2023, Volume and Issue: 11(23), P. 8580 - 8591

Published: May 27, 2023

The global market for polycarbonate (PC) increases steadily because of its heat resistance, toughness, and optical transparency. To achieve sustainability, the waste (WPC) should be recycled. This work reports a 100% atom-efficiency upcycling WPC to WPC-derived aldehyde (WPC-CHO). Then, poly(carbonate imine) vitrimers (PCIs) based on WPC-CHO two aromatic diamines were prepared. Generally, polyimines can cleave in mild acidic conditions such as 0.1 M HCl(aq) seldom show good thermal tensile properties. PCIs this showed properties an unprecedented resistance toward acid hydrolysis. They survive even immersing 5 H2SO4 THF/H2O solution 6 months. unusual hydrolysis expands application environment. Small pieces compression-molded into newly formed polymer film at 240 °C. reprocessability demonstrates vitrimer characteristic PCIs. degraded through simultaneous aminolysis carbonate transimination imine by hexylamine (HA) catalyst-free condition. Based transimination, we cross-linking network PCI-based carbon fiber-reinforced (CFRP) recovered undamaged fiber. environmentally friendly will attract attention researchers who are interested sustainability circularity.

Language: Английский

---

Solvent-Promoted Catalyst-Free Recycling of Waste Polyester and Polycarbonate Materials

ACS Macro Letters, Journal Year: 2024, Volume and Issue: unknown, P. 151 - 157

Published: Jan. 16, 2024

Polymeric materials are indispensable in our daily lives. However, the generation of vast amounts waste polymers poses significant environmental and ecological challenges. Instead resorting to landfilling or incineration, strategies for polymer recycling offer a promising approach mitigate pollution. Pioneering studies have demonstrated alcoholysis polyesters polycarbonates; however, these processes typically require use catalysts. Moreover, development catalyst removal is crucial, particularly some industrial applications. In contrast, we present catalyst-free method common polyester polycarbonate into small organic molecules. Certain polar solvents exhibit remarkable efficiency degradation under conditions. Employing solvents, both resins commercially available products could be effectively degraded via alcoholysis. Our design contributes straightforward route polymeric materials.

Language: Английский

---

Recent advances in nanotechnology-based modifications of micro/nano PET plastics for green energy applications

Chemosphere, Journal Year: 2024, Volume and Issue: 352, P. 141417 - 141417

Published: Feb. 8, 2024

Language: Английский

---

Ultrafast and selective chemical recycling of PLA to methyl lactate by using MHMDS as simple catalysts

Polymer Degradation and Stability, Journal Year: 2024, Volume and Issue: 222, P. 110706 - 110706

Published: Feb. 17, 2024

Language: Английский

---