Accessing a Carboxyl‐Anhydride Molecular Switch‐Mediated Recyclable PECT Through Upcycling End‐of‐Use PET DOI Open Access
Hongjie Zhang,

Mingyuan Fang,

Sijie Niu

et al.

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

Poly(ethylene terephthalate) (PET), with an annual production of exceeding 70 million tons, is mainly utilized in disposable fields and subsequently contribute to severe environmental pollution. Conventional chemical recycling, which typically involves depolymerizing polymer into monomers, limited due the intricate recycling process, excess using unrecyclable solvents low conversion. Inspired by protein's molecular switches, we propose a novel polymer-to-polymer strategy based on polycondensation principles upcycling waste PET high-value recyclable poly(ethylene-co-1,4-cyclohexanedimethanol derivatives containing switches. Upon deactivating switch, acidification reaction occurs within system, leading rapid controllable reduction weight imbalance reactive group. Conversely, activating switch triggers ring-closing that detaches acid anhydrides, bringing about equal molar ratio groups thereby facilitating increase weight. By simply incorporating condensation products melt polycondensation, closed-loop capability achieved without necessitating excessive organic or complex depolymerization processes. The present study not only presents pathway for end-of-use but also introduces innovative concept switching recyclability polymers, demonstrating significant potential large-scale implementation.

Language: Английский

Plastics can be used more sustainably in agriculture DOI Creative Commons
Thilo Hofmann, Subhasis Ghoshal, Nathalie Tufenkji

et al.

Communications Earth & Environment, Journal Year: 2023, Volume and Issue: 4(1)

Published: Sept. 25, 2023

Abstract Plastics have become an integral component in agricultural production as mulch films, nets, storage bins and many other applications, but their widespread use has led to the accumulation of large quantities soils. Rational reduction, collection, reuse, innovative recycling are key measures curb plastic pollution from agriculture. that cannot be collected after must biodegradable environmentally benign manner. Harmful additives replaced with safer alternatives reduce toxicity burdens included ongoing negotiations surrounding United Nations Treaty. Although full substitution plastics is currently not possible without increasing overall environmental footprint jeopardizing food security, smaller impacts should used endorsed within a clear socio-economic framework. Better monitoring reporting, technical innovation, education training, social economic incentives imperative promote more sustainable

Language: Английский

Citations

91
Plastic recycling: A panacea or environmental pollution problem DOI Creative Commons
Nisha Singh, Tony R. ‎Walker

npj Materials Sustainability, Journal Year: 2024, Volume and Issue: 2(1)

Published: Aug. 1, 2024

Abstract Increasing plastic waste is a critical global challenge to ecological and human health requiring focused solutions reduce omnipresent pollution in the environment. While recycling has been touted as one solution counter resource utilization, it largely ineffective offsetting impact of rising production more than 400 million metric tonnes annually, due low rates only 9%. Over three decades since implementing resin codes, favoured thermoplastics, neglecting thermoset plastics. There constant need enhance overall efficiency by exploring advanced methods, enormous gaps exist fully unlocking potential recycling. We identify associated with its environmental impacts. discuss substantial progress technology, designs-for-recyclability controlled chemical use, economic incentives expand markets for recycled plastics curb leakage into Additionally, we highlight some emerging strategies legally binding international policy instruments, such Global Plastics Treaty that require further development improve recyclability.

Language: Английский

Citations

50
Mismatched Supramolecular Interactions Facilitate the Reprocessing of Super‐Strong and Ultratough Thermoset Elastomers DOI
Luping Wang, Kaiqiang Zhang,

Xingxue Zhang

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(28)

Published: May 17, 2024

Thermoset elastomers have been extensively applied in many fields because of their excellent mechanical strengths and durable characteristics, such as an chemical resistance. However, the context environmental issues, nonrecyclability thermosets has become a major barrier to further development these materials. Here, well-tailored strategy is reported solve this problem by introducing mismatched supramolecular interactions (MMSIs) into covalently cross-linked poly(urethane-urea) network with dynamic acylsemicarbazide moieties. The MMSIs significantly strengthen toughen thermoset elastomer effectively dissipating energy resisting external stress. In addition, recycling efficiency improved 2.7-fold due superior reversibility MMSIs. optimized features outstanding including ultrahigh tensile strength (110.8 MPa), unprecedented toughness (1245.2 MJ m

Language: Английский

Citations

43
Adaptive and intelligent polyurethane shape-memory polymers enabling next-generation biomedical platforms DOI Creative Commons

Tomy Muringayil Joseph,

Martin George Thomas, Debarshi Kar Mahapatra

et al.

Case Studies in Chemical and Environmental Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 101165 - 101165

Published: Feb. 1, 2025

Language: Английский

Citations

2
Biorenewable and circular polydiketoenamine plastics DOI
Jérémy Demarteau, Benjamin Cousineau, Zilong Wang

et al.

Nature Sustainability, Journal Year: 2023, Volume and Issue: 6(11), P. 1426 - 1435

Published: July 27, 2023

Language: Английский

Citations

30
Depolymerization of Polymethacrylates with Ball-Mill Grinding DOI
Eunsong Jung, Minyoung Cho, Gregory I. Peterson

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: 57(7), P. 3131 - 3137

Published: March 25, 2024

In this report, we demonstrate that polymethacrylates can undergo appreciable depolymerization, with mild conditions and without reactive end groups, using ball-mill grinding (BMG). For instance, the important commercial polymer, poly(methyl methacrylate) (PMMA) underwent up to 41% depolymerization monomer within 8 min of grinding. We explored factors influence conversion found temperature (heating only 43 °C), addition a small amount liquid (μL tert-butyl alcohol), ball number/size be most parameters. also applied method other pendent substituent extent depolymerization. Addition was reverse effects were observed bulk among studied, PMMA had lowest in one highest conversions slurry. Notably, molecular weight residual polymer is remarkably low, ca. 1 kDa, demonstrating excellent degradation performance BMG. Overall, work provides mechanistic insight into reactions under ball-milling represents an step expanding BMG as tool for chemical recycling polymethacrylates.

Language: Английский

Citations

13
Catalytic chemical recycling and upcycling of polyolefin plastics DOI Creative Commons

Yingzi Tan,

Yidan Cheng, Jiaming Xu

et al.

Giant, Journal Year: 2024, Volume and Issue: 19, P. 100307 - 100307

Published: June 14, 2024

Polyolefins are the most produced and widely used polymeric materials. However, chemically inert nature of polyolefins has led to severe environmental pollution, posing a threat human sustenance development. Managing recycling polyolefin plastic waste is crucial for transition from linear sustainable circular economy. Catalytic chemical includes traditional techniques like pyrolysis photolysis, innovative methods that introduce cleavable bonds into chain closed-loop recycling. post-functionalization post-consumer materials another strategy tackle waste, aiming upgrade materials' utility contribute sustainability. Overall, developing catalytic deconstructing upcycling plastics essential encourage better reclamation practices reduce impact waste.

Language: Английский

Citations

10
Towards high performance and durable soft tactile actuators DOI Creative Commons
Matthew Tan, Hui Wang, Dace Gao

et al.

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(7), P. 3485 - 3535

Published: Jan. 1, 2024

Soft actuators are gaining significant attention due to their ability provide realistic tactile sensations in various applications. However, soft nature makes them vulnerable damage from external factors, limiting actuation stability and device lifespan. The susceptibility becomes higher with these often direct contact surroundings generate feedback. Upon onset of damage, the or repeatability will be undermined. Eventually, when complete failure occurs, disposed of, accumulating waste driving consumption natural resources. This emphasizes need enhance durability for continued operation. review presents principles feedback actuators, followed by a discussion mechanisms, advancements, challenges faced realize high performance, categorized stimuli. Diverse approaches achieve evaluated, including self-healing, resistance, self-cleaning, temperature actuators. In sections, current potential material designs identified, paving way developing durable

Language: Английский

Citations

9
Bio-oil derived polyesteramides as water-degradable replacements for polyethylene DOI Creative Commons

Yohei Yoshinaka,

Stephen A. Miller

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

Published: Jan. 1, 2025

Polyesteramides derived from Ethiopian mustard seed bio-oil possess commercially relevant thermomechanical properties and are chemically recyclable water-degradable.

Language: Английский

Citations

1
Sustainable nanofibrous membranes for air filtration, water purification and oil removal DOI Creative Commons
Nayli Erdeanna Binte Surat’man,

Xin Lin Quek,

Nannan Wang

et al.

Nanoscale, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The increasing demand for sustainable solutions to address environmental and energy challenges has driven the development of advanced materials. This paper highlights recent advancements in nanofibrous membranes.

Language: Английский

Citations

1