Highly Efficient Depolymerization of Polycarbonate Enabled by Dispersions of Ultrasmall ZnO Nanoparticles DOI
Tianbao Chen,

Ling‐Xia Yun,

Bin Zhang

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(42), P. 17868 - 17877

Published: Oct. 15, 2024

In the pursuit of circular economies aimed at achieving sustainable development, chemical recycling emerges as a promising method for transforming polycarbonate (PC) plastic into value-added monomer. Herein, methanol dispersions ultrasmall ZnO nanoparticles (∼4 nm) are firstly utilized catalytic methanolysis PC. Under mild reaction conditions (120 °C, 1 h) with low catalyst amount (0.8 wt %), complete conversion PC and 97.8% yield BPA could be achieved. The above also capable depolymerizing representative real wastes (DVD disks, CD sheets) least 96%, exhibiting excellent prospects industrial application. Furthermore, possible mechanism was proposed, kinetics investigated an activation energy 122.39 kJ/mol. More importantly, activity can reach high 125 g h–1 (g ZnO)−1, highest reported to date.

Language: Английский

Selective Recycling of Mixed Polyesters via Heterogeneous Photothermal Catalysis DOI Open Access
Yu Liu,

Penglei Yan,

Xiaodong Li

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

The selective recycling of mixed plastic wastes with similar structural units is challenging. While heterogeneous catalysis shows potential for recycling, challenges such as complex mass transfer at multiphase interfaces and unclear catalytic mechanisms have slowed progress. In this study, a breakthrough in polyester introduced using photothermal catalysis. By adding co-solvents, the difficulties associated interfacial are overcome. Grain boundary (GB)-rich CeO

Language: Английский

Citations

1
Recycling Polyester and Polycarbonate Plastics with Carbocation Lewis Acidic Organocatalysts DOI

Nan Wang,

Qiao Zhang, Zhiqiang Sun

et al.

ACS Macro Letters, Journal Year: 2025, Volume and Issue: unknown, P. 377 - 384

Published: March 8, 2025

The effective management of plastic waste is critical for environmental sustainability. This work explores the use carbocation catalysts recycling common polyesters and polycarbonates through alcoholysis. We demonstrate complete depolymerization end-of-life materials investigate relationship between catalytic reactivity structural features compounds, including cations their counteranions. Carbocations function as Lewis acids, facilitating interaction with carbonyls in polymer chains. Moreover, our approach enables hierarchical degradation polyester blends. research not only elucidates role carbocations alcoholysis these polymers, but also establishes a metal-free process efficient plastics.

Language: Английский

Citations

1
NaOH-Catalyzed Alcoholysis of Polylactide DOI
Weiwei Chen, Yanwei Wang, Yong Zhang

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Language: Английский

Citations

0
Research roadmap for sustainable polymeric materials in Korea DOI
Jeong F. Kim, Hee Joong Kim, Jeyoung Park

et al.

Macromolecular Research, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

Language: Английский

Citations

0
Towards Sustainable Production of Polybutylene Adipate Terephthalate: Non‐biological Catalytic Syntheses of Biomass‐derived Constituents DOI Creative Commons
Jechan Lee, Chanyeong Park, Yiu Fai Tsang

et al.

ChemSusChem, Journal Year: 2024, Volume and Issue: unknown

Published: July 10, 2024

Abstract Renewable chemicals, which are made from renewable resources such as biomass, have attracted significant interest substitutes for natural gas‐ or petroleum‐derived chemicals to enhance the sustainability of chemical and petrochemical industries. Polybutylene adipate terephthalate (PBAT), is a copolyester 1,4‐butanediol (1,4‐BDO), adipic acid (AA), dimethyl (DMT) terephthalic (TPA), has garnered biodegradable polymer. This study assesses non‐biological production PBAT monomers biomass feedstocks via heterogeneous catalytic reactions. The biomass‐based routes each monomer analyzed compared conventional routes. Although no fully commercialized processes direct conversion into 1,4‐BDO, AA, DMT, TPA available, emerging promising been proposed. proposed pathways toward not yet competitive with fossil fuel‐based mainly due high feedstock prices existence other alternatives. However, given continuous technological advances in monomers, bio‐based should be economically viable near future.

Language: Английский

Citations

3
Ionic liquids as a shuttle for releasing and capturing hydrogen chloride: a new way to utilize waste HCl generated in organic reactions DOI

Fanzeng Kong,

Minghao Li, Rongxian Bai

et al.

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(8), P. 4844 - 4850

Published: Jan. 1, 2024

An ionic liquid, 1-[1-(ethoxycarbonyl)-2-oxopropyl]-3-methylimidazolium chloride, was used as a shuttle to release and capture hydrogen enabling waste HCl be in organic reactions.

Language: Английский

Citations

2
Degradation of polycarbonate waste to recover bisphenol A and dimethyl carbonate using urea as a cheap green catalyst DOI Creative Commons
Nan Hu, Lijuan Su, Hongyan Li

et al.

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(17), P. 9378 - 9387

Published: Jan. 1, 2024

Urea catalyzes the degradation of polycarbonate to bisphenol A and dimethyl carbonate, where urea, methanol carbonate form a six-membered ring.

Language: Английский

Citations

2
Highly Efficient Depolymerization of Polycarbonate Enabled by Dispersions of Ultrasmall ZnO Nanoparticles DOI
Tianbao Chen,

Ling‐Xia Yun,

Bin Zhang

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(42), P. 17868 - 17877

Published: Oct. 15, 2024

In the pursuit of circular economies aimed at achieving sustainable development, chemical recycling emerges as a promising method for transforming polycarbonate (PC) plastic into value-added monomer. Herein, methanol dispersions ultrasmall ZnO nanoparticles (∼4 nm) are firstly utilized catalytic methanolysis PC. Under mild reaction conditions (120 °C, 1 h) with low catalyst amount (0.8 wt %), complete conversion PC and 97.8% yield BPA could be achieved. The above also capable depolymerizing representative real wastes (DVD disks, CD sheets) least 96%, exhibiting excellent prospects industrial application. Furthermore, possible mechanism was proposed, kinetics investigated an activation energy 122.39 kJ/mol. More importantly, activity can reach high 125 g h–1 (g ZnO)−1, highest reported to date.

Language: Английский

Citations

0