Chemical Recycling of Catalytic Glycolysis of Polyethylene Terephthalate with Potassium-Rich Biomass DOI Creative Commons

Zhe Bai,

Zhixian Bao,

Haoquan Hu

et al.

Recycling, Journal Year: 2025, Volume and Issue: 10(3), P. 85 - 85

Published: May 2, 2025

Polyethylene terephthalate (PET) products are ubiquitous in daily life, offering convenience but posing significant environmental challenges due to their persistence and the difficulty of recycling them. Improper disposal waste PET contributes severe pollution resource loss. Chemical degradation has emerged as one most effective methods for recovering reusing PET. This article introduces a catalytic glycolysis strategy efficient environmentally sustainable using potassium-rich biomass, specifically banana peels. The study demonstrated that K2O K2CO3, derived from calcined peels, significantly catalyze Under optimal conditions, complete was achieved within 1.5 h at 180 °C, without additional chemical reagents. Product distribution confirmed high-purity bis(2-hydroxyethyl) could be obtained. interaction between K2CO3 ethylene glycol plays critical role determining competition alkaline hydrolysis. Furthermore, Density Functional Theory calculations provided valuable insights into transesterification process during glycolysis. reaction system also excellent compatibility with colored products. successfully realized simultaneous post-consumer novel approach valorization.

Language: Английский

Characterization of Properties and Kinetic Analysis of Unsaturated Polyester Resin Synthesized from PET Alcoholysis Waste DOI Open Access
Ruixiang Wang, Hongliang Zhang,

J. J. Liu

et al.

Polymers, Journal Year: 2025, Volume and Issue: 17(6), P. 820 - 820

Published: March 20, 2025

Recycling and reutilization of waste PET through alcoholysis has been a prominent focus current research. However, the process is reversible, leading to generation oligomeric byproducts. To further utilize these wastes, this paper processed derived from various systems synthesize unsaturated polyester resins (UPRs). The fundamental characteristics, mechanical properties, curing processes synthesized UPRs were analyzed based on GPC, FTIR, TG, tensile testing, DMA, DSC tests. results indicate that wastes successfully UPRs. ethylene glycol (EG) diethylene (DEG) possess more complex compositions; among these, UPR EG exhibited higher thermal stability, whereas DEG showed broader molecular weight distribution lower glass transition temperature (Tg). In addition, remarkably high elongation at break (>180%), potentially attributed its long chains. Regarding obtained propylene (PG) slower rates demanded activation energies. Moreover, could be well described by Sesták–Berggren autocatalytic model.

Language: Английский

Citations

0
Chemical Recycling of Catalytic Glycolysis of Polyethylene Terephthalate with Potassium-Rich Biomass DOI Creative Commons

Zhe Bai,

Zhixian Bao,

Haoquan Hu

et al.

Recycling, Journal Year: 2025, Volume and Issue: 10(3), P. 85 - 85

Published: May 2, 2025

Polyethylene terephthalate (PET) products are ubiquitous in daily life, offering convenience but posing significant environmental challenges due to their persistence and the difficulty of recycling them. Improper disposal waste PET contributes severe pollution resource loss. Chemical degradation has emerged as one most effective methods for recovering reusing PET. This article introduces a catalytic glycolysis strategy efficient environmentally sustainable using potassium-rich biomass, specifically banana peels. The study demonstrated that K2O K2CO3, derived from calcined peels, significantly catalyze Under optimal conditions, complete was achieved within 1.5 h at 180 °C, without additional chemical reagents. Product distribution confirmed high-purity bis(2-hydroxyethyl) could be obtained. interaction between K2CO3 ethylene glycol plays critical role determining competition alkaline hydrolysis. Furthermore, Density Functional Theory calculations provided valuable insights into transesterification process during glycolysis. reaction system also excellent compatibility with colored products. successfully realized simultaneous post-consumer novel approach valorization.

Language: Английский

Citations

0