Facile Depolymerization of Thermally Stable Polyetherethersulfone and Polyetheretherketone Using Hydroquinone and Bases DOI
Yasunori Minami,

Rena Honobe,

Shunsuke Tsuyuki

et al.

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

Published: Sept. 21, 2024

Super engineering plastics such as polyetheretherketone (PEEK) and polyetherethersulfone (PEES) exhibit thermal stability, chemical resistance, mechanical strength. Such characteristics are attributed to their robust structures composed of stable aryl ethers. These features make recycling difficult. This is because it necessary overcome through the stability material then precisely cleave bonds. study demonstrates depolymerization PEES PEEK by hydroquinone in presence sodium hydroxide 1,3-dimethyl-2-imidazolidinone (DMI) solvent at 150 °C. method effectively provides monomeric products, diphenylsulfone benzophenone having two 4-hydroxyphenoxy groups both para positions. DMI was crucial factor for this transformation, since enhanced reactivity ether

Language: Английский

Recycling and Degradation of Polyamides DOI Creative Commons
Lin Zheng,

Mengjin Wang,

Yaoqin Li

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(8), P. 1742 - 1742

Published: April 11, 2024

As one of the five major engineering plastics, polyamide brings many benefits to humans in fields transportation, clothing, entertainment, health, and more. However, as production increases year by year, pollution problems it causes are becoming increasingly severe. This article reviews current recycling treatment processes polyamide, such chemical, mechanical, energy recovery, degradation methods thermal oxidation, photooxidation, enzyme degradation, etc. Starting from synthesis mechanism discusses advantages disadvantages different obtain more environmentally friendly economical schemes. Finding enzymes that can degrade high-molecular-weight polyamides, exploring recovery polyamides under mild conditions, synthesizing degradable through copolymerization or molecular design, finally preparing bio-based may be destination polyamide.

Language: Английский

Citations

14
Upcycling plastic wastes into high-performance nano-MOFs by efficient neutral hydrolysis for water adsorption and photocatalysis DOI

Ling‐Xia Yun,

Meng Qiao,

Bin Zhang

et al.

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(30), P. 19452 - 19461

Published: Jan. 1, 2024

Employing polyethylene terephthalate (PET) wastes as a linker source is cost-effective, renewable, and sustainable approach to attain high-performance nano-MOFs for water adsorption photocatalysis.

Language: Английский

Citations

6
Synthesis of new sustainable polyester‐type hydrogels from chemical recycled poly(ethylene terephthalate) products applied on the removal of indigo carmine dye DOI

Daniela Eduarda Schneider,

Tomás M. Simioni, César Liberato Petzhold

et al.

Journal of Applied Polymer Science, Journal Year: 2024, Volume and Issue: 141(29)

Published: May 5, 2024

Abstract Large amounts of plastic waste are daily generated, becoming a global issue that needs to be addressed. Thus, new recycling alternatives have been explored, such as the depolymerization poly(ethylene terephthalate) (wPET). These reactions can lead formation oligomers and monomers, which then employed in synthetic processes. The aim this work is use products chemical wPET on synthesis hydrogels evaluate capacity these materials adsorb dyes aiming wastewater treatment. depolymerizations were done through glycerolysis catalyzed by zinc (II) acetate under microwave radiation. Afterwards, obtained oil was crosslinked with citric acid (CA) tin chloride catalysis obtain hydrogels. water uptake ranged from 310% 1442%, depending CA content. When placed an indigo carmine solution, showed high adsorption capacity, removing up 97% dye. kinetic study revealed physicochemical mechanism for removal process, corroborated Temkin isotherms. results indicate PET via viable alternative producing hydrogels, reducing while creating tools

Language: Английский

Citations

4
Upcycling of waste polyester for the development of circular economy DOI

Huaiyuan Zhao,

Yingdan Ye,

Yibin Zhang

et al.

Chemical Communications, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Progress in chemical recycling of waste polyesters (waste plastic refinery) was reviewed and prospected, newly reported thermal catalysis, photocatalysis, electrocatalysis, biocatalysis the recycle PET-based product were introduced.

Language: Английский

Citations

4
The effect of waste tire granules on the properties of polyethylene terephthalate thermoplastic DOI Creative Commons
Huei Ruey Ong, Wan Mohd Eqhwan Iskandar, Md. Maksudur Rahman Khan

et al.

E3S Web of Conferences, Journal Year: 2025, Volume and Issue: 603, P. 02003 - 02003

Published: Jan. 1, 2025

The utilization of waste tire granules (WTG) as a reinforcing agent in polyethylene terephthalate (PET) offers sustainable approach to enhancing thermoplastic composites. PET is known for its recyclability, while WTG provides solution management. This study examines the effect content and particle size on PET/WTG Scanning Electron Microscopy (SEM) Fourier Transform Infrared Spectroscopy (FTIR) were used analyze composites' morphology chemical composition. Mechanical tests evaluated elongation impact performance with incorporation. SEM showed compatible between matrix WTG. FTIR spectra displayed characteristic vibrations polyisoprene from PETspecific functional groups. inclusion significantly improved mechanical properties that leads enhanced at break (EB) increased ductility. Impact strength also notably 10% These findings demonstrate potential filler enhance contribute management well development value-added products recycled materials.

Language: Английский

Citations

0
Thermodynamically Leveraged Solventless Aerobic Deconstruction of Polyethylene-Terephthalate Plastics Over a Single-Site Molybdenum-Dioxo Catalyst DOI Creative Commons
Naveen Malik, Jiaqi Li, Amol Agarwal

et al.

Green Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This study reports the ambient catalytic depolymerization of PET under solvent-free conditions, using a carbon-supported single-site molybdenum-dioxo catalyst.

Language: Английский

Citations

0
Efficient and Selective Catalytic Oxidation of Ethylbenzene over Co-MOF Synthesized from Waste PET DOI
Ziyi Wang, Changyan Guo, Kefu Wang

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

Language: Английский

Citations

0
Advancements in Chemical Recycling Catalysts for Plastic Waste in South Korea DOI Open Access
Tae‐Min Jang, Il Sheob Shin, Jungwook Choi

et al.

Catalysts, Journal Year: 2025, Volume and Issue: 15(5), P. 414 - 414

Published: April 23, 2025

Plastics are widely used in various industries because of their light weight, low cost, and high durability. The mass production consumption plastics have led to a rapid increase plastic waste problem, necessitating the development effective recycling technologies. chemical has emerged as promising strategy address these challenges, enabling conversion into high-purity monomers or oils, even from contaminated mixed feedstock. This review focuses on catalysts for South Korea, which one highest per capita rates both academic industrial efforts this field. We examine catalytic depolymerization processes recovering polymers, such polyethylene terephthalate (PET) polycarbonate (PC), well pyrolysis polyolefins, including (PE), polypropylene (PP), polystyrene (PS). By summarizing recent research initiatives highlights strategic role country advancing recycling. Moreover, proposes future directions reusable catalysts, energy-efficient process, strategies waste.

Language: Английский

Citations

0
Mechanistic investigation on hydrolysis, alcoholysis, and ammonolysis of polyethylene terephthalate initiated by participation of calcium ions DOI

Xiaosong Luo,

Qibin Li, Xi Chen

et al.

Process Safety and Environmental Protection, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Language: Английский

Citations

1
Facile Depolymerization of Thermally Stable Polyetherethersulfone and Polyetheretherketone Using Hydroquinone and Bases DOI
Yasunori Minami,

Rena Honobe,

Shunsuke Tsuyuki

et al.

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

Published: Sept. 21, 2024

Super engineering plastics such as polyetheretherketone (PEEK) and polyetherethersulfone (PEES) exhibit thermal stability, chemical resistance, mechanical strength. Such characteristics are attributed to their robust structures composed of stable aryl ethers. These features make recycling difficult. This is because it necessary overcome through the stability material then precisely cleave bonds. study demonstrates depolymerization PEES PEEK by hydroquinone in presence sodium hydroxide 1,3-dimethyl-2-imidazolidinone (DMI) solvent at 150 °C. method effectively provides monomeric products, diphenylsulfone benzophenone having two 4-hydroxyphenoxy groups both para positions. DMI was crucial factor for this transformation, since enhanced reactivity ether

Language: Английский

Citations

0