Redesigned Nylon 6 Variants with Enhanced Recyclability, Ductility, and Transparency DOI Creative Commons
Jie Tian, Xiaoyang Liu, Liwei Ye

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(17)

Published: Feb. 29, 2024

Abstract Geminal ( gem −) disubstitution in heterocyclic monomers is an effective strategy to enhance polymer chemical recyclability by lowering their ceiling temperatures. However, the effects of specific substitution patterns on monomer's reactivity and resulting polymer's properties are largely unexplored. Here we show that, systematically installing ‐dimethyl groups onto ϵ‐caprolactam (monomer nylon 6) from α ϵ positions, both redesigned lactam ‐nylon 6’s highly sensitive position, with ranging non‐polymerizable polymerizable inferior far superior parent 6. Remarkably, 6 ‐dimethyls substituted at γ position amorphous optically transparent, a higher T g (by 30 °C), yield stress 1.5 MPa), ductility 3×), lower depolymerization temperature 60 °C) than conventional

Language: Английский

Chemically recyclable polymer materials: polymerization and depolymerization cycles DOI
Guangqiang Xu, Qinggang Wang

Green Chemistry, Journal Year: 2022, Volume and Issue: 24(6), P. 2321 - 2346

Published: Jan. 1, 2022

The design and synthesis of chemically recyclable polymers, which can be reutilized as their starting monomers or new value-added chemicals, has provided a practical approach to address the end-of-use problem polymer materials possible closed-loop method for material usage. More more attention been paid exhibit an increasing prominent role in sustainable development. Nowadays, polymers including polyesters, polythioesters, polycarbonates, polyacetals, polyamides, so on have made significant achievements. Consequently, this minireview summarizes examples achieving polymerization–depolymerization cycle access are categorized into seven parts based monomers.

Language: Английский

Citations

152
Strong and Tough Supramolecular Covalent Adaptable Networks with Room‐Temperature Closed‐Loop Recyclability DOI

Zhuoqiang Zhang,

Dong Lei,

Chenxuan Zhang

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(7)

Published: Nov. 11, 2022

Development of closed-loop chemically recyclable plastics (CCRPs) that can be widely used in daily life a fundamental solution to the global plastic waste crisis. Hence, it is great significance develop easy-to-recycle CCRPs possess superior or comparable material properties commodity plastics. Here, novel dual crosslinked CCRP, namely, supramolecular covalent adaptable networks (supra-CANs), reported, which not only displays mechanical higher than strong and tough polycarbonate, but also exhibits excellent solvent resistance as thermosets. The supra-CANs are constructed by introducing reversible noncovalent crosslinks into dynamic polymer networks, resulting highly stiff thermosets exhibit thermoplastic-like ductile behaviors well reprocessability rehealability. In contrast, analogs do have (CANs) show elastomeric with significantly decreased strength. Importantly, developed CANs converted back initial monomers high yields purity at room temperature, even additives, enables sustainable polymer-monomer-polymer circulation. This work provides new design principles for high-performance polymers substitutes conventional

Language: Английский

Citations

125
Recyclable and (Bio)degradable Polyesters in a Circular Plastics Economy DOI
Changxia Shi, Ethan C. Quinn, Wilfred T. Diment

et al.

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(7), P. 4393 - 4478

Published: March 22, 2024

Polyesters carrying polar main-chain ester linkages exhibit distinct material properties for diverse applications and thus play an important role in today's plastics economy. It is anticipated that they will even greater tomorrow's circular economy focuses on sustainability, thanks to the abundant availability of their biosourced building blocks presence bonds can be chemically or biologically cleaved demand by multiple methods bring about more desired end-of-life plastic waste management options. Because this potential promise, there have been intense research activities directed at addressing recycling, upcycling biodegradation existing legacy polyesters, designing biorenewable alternatives, redesigning future polyesters with intrinsic chemical recyclability tailored performance rival commodity are either petroleum based and/or hard recycle. This review captures these exciting recent developments outlines challenges opportunities. Case studies poly(lactic acid), poly(3-hydroxyalkanoate)s, poly(ethylene terephthalate), poly(butylene succinate), poly(butylene-adipate presented, emerging recyclable comprehensively reviewed.

Language: Английский

Citations

98
Tough while Recyclable Plastics Enabled by Monothiodilactone Monomers DOI
Yanchao Wang,

Yinuo Zhu,

Wenxiu Lv

et al.

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(3), P. 1877 - 1885

Published: Jan. 3, 2023

The current scale of plastics production and the attendant waste disposal issues represent an underexplored opportunity for chemically recyclable polymers. Typical polymers are subject to trade-off between monomer's polymerizability polymer's depolymerizability as well insufficient performance practical applications. Herein, we demonstrate that a single atom oxygen-by-sulfur substitution relatively highly strained dilactone is effective robust strategy converting "non-recyclable" polyester into polymer by lowering ring strain energy in monomer (from 16.0 kcal mol-1 9.1 monothiodilactone). These monothio-modification monomers enable both high/selective recyclability, otherwise conflicting features typical monomer, evidenced regioselective ring-opening, minimal transthioesterifications, quantitative recovery pristine monomer. Computational experimental studies n→π* interaction adjacent ester thioester backbone has been implicated high selectivity propagation over transthioesterification. resulting demonstrates with its mechanical properties being comparable some commodity polyolefins. Thio-modification powerful enabling conversion six-membered dilactones tough thermoplastics exhibit promise next-generation sustainable

Language: Английский

Citations

92
Selective, Sequential, and “One-Pot” Depolymerization Strategies for Chemical Recycling of Commercial Plastics and Mixed Plastics DOI

Rulin Yang,

Guangqiang Xu,

Bingzhe Dong

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2022, Volume and Issue: 10(30), P. 9860 - 9871

Published: July 21, 2022

The commercial plastics that are currently used in large-scale primarily concerned with performance and durability, rather than degradability recyclability. As a result, the chemical recycling of becomes significant challenge. Selective depolymerization mixed plastic waste is promising solution to challenges caused by accumulation. Here we present sequential "one-pot" strategies for (PLA, BPA-PC, PBS, PBAT, PCL, PET) (BPA-PC/PET, PLA/PBS, PLA/PBAT) their initial monomers or value-added chemicals. Taking advantage differences reactivity versatile catalytic degradation ability zinc bis[bis(trimethylsilyl)amide] [Zn(HMDS)2], selective process was smoothly achieved under mild conditions. These provide ideas promoting sustainable development being large-scale.

Language: Английский

Citations

88
Sustainable developments in polyolefin chemistry: Progress, challenges, and outlook DOI

Xiaoyan Wang,

Yanshan Gao, Yong Tang

et al.

Progress in Polymer Science, Journal Year: 2023, Volume and Issue: 143, P. 101713 - 101713

Published: June 25, 2023

Language: Английский

Citations

79
Advancing the Development of Recyclable Aromatic Polyesters by Functionalization and Stereocomplexation DOI

Hua‐Zhong Fan,

Xing Yang, Jiahao Chen

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(15)

Published: Feb. 1, 2022

The development of innovative synthetic polymer systems to overcome the trade-offs between polymer's depolymerizability and performance properties is in high demand for advanced material applications sustainable development. In this contribution, we prepared a class aromatic cyclic esters (M1-M5) from thiosalicylic acid epoxides by facile one-pot synthesis. Ring-opening polymerization Ms afforded polyesters P(M)s with molecular weights narrow dispersities. physical mechanical can be modulated stereocomplexation regulation side-chain flexibility polymers, ultimately achieving high-performance such as thermal stability crystallinity (Tm up 209 °C), well polyolefin-like strength, ductility, toughness. Furthermore, functionalizable moieties have driven wide array post-polymerization modifications toward access value-added materials. More importantly, were able selectively depolymerize into monomers excellent yields, thus establishing its circular life cycle.

Language: Английский

Citations

73
Emerging environmentally friendly bio-based nanocomposites for the efficient removal of dyes and micropollutants from wastewater by adsorption: a comprehensive review DOI Creative Commons

Wafa Al-Gethami,

Muhammad Azam Qamar, Mohammad Shariq

et al.

RSC Advances, Journal Year: 2024, Volume and Issue: 14(4), P. 2804 - 2834

Published: Jan. 1, 2024

Water scarcity will worsen due to population growth, urbanization, and climate change.

Language: Английский

Citations

67
Ring-Opening Polymerization for the Goal of Chemically Recyclable Polymers DOI Creative Commons
Christopher M. Plummer, Le Li, Yongming Chen

et al.

Macromolecules, Journal Year: 2023, Volume and Issue: 56(3), P. 731 - 750

Published: Feb. 6, 2023

A crucial modern dilemma relates to the ecological crisis created by excess plastic waste production. An emerging technology for reducing is production of "chemically recyclable" polymers. These polymers can be efficiently synthesized through ring-opening polymerization (ROP/ROMP) and later recycled pristine monomer ring-closing depolymerization, in an efficient circular-type system. This Perspective aims explore chemistry involved preparation these monomer/polymer systems, while also providing overview challenges involved, including future directions.

Language: Английский

Citations

61
Ring-Opening Polymerization of a Seven-Membered Lactone toward a Biocompatible, Degradable, and Recyclable Semi-aromatic Polyester DOI

Mao-Qin Li,

Zixuan Luo,

Xiaoyan Yu

et al.

Macromolecules, Journal Year: 2023, Volume and Issue: 56(6), P. 2465 - 2475

Published: March 14, 2023

The widespread use of polymer materials and their improper disposal have resulted in significant environmental pollution wastage resources. Therefore, the design chemically recyclable, environmentally compatible, applicable polymers represents a new approach for green circular economy, it has become major focus worldwide. Herein, we efficiently synthesized seven-membered ether lactone, 3,4-dihydro-2H-benzo[b][1,4]dioxepin-2-one (BDXO), through one-step reaction successfully realized its controlled ring-opening polymerization (ROP). ROP BDXO bulk solvent conditions catalyzed by Sn(Oct)2 was investigated systematically, thermodynamic parameters obtained were ΔSP0 = −30.90 J·mol–1·K–1 ΔHP0 −14.52 kJ·mol–1. PBDXO exhibits excellent thermal properties, mechanical biocompatibility, complete hydrolytic degradability. Notably, not only direct chemical recycling to monomer with high efficiency depolymerization yield greater than 92% purity up 96% but also regenerated almost same structure properties as initial repolymerization recycled BDXO, establishing polymer–monomer–polymer closed-loop life cycle.

Language: Английский

Citations

42