Polymer Degradation and Stability, Год журнала: 2024, Номер 221, С. 110695 - 110695
Опубликована: Фев. 8, 2024
Язык: Английский
Polymers, Год журнала: 2023, Номер 15(19), С. 3881 - 3881
Опубликована: Сен. 25, 2023
The concept of the circular economy has emerged as a promising solution to address mounting concerns surrounding plastic waste and urgent need for sustainable resource management. While conventional centralized recycling remains common practice waste, facilities may prove inadequate in handling ever-increasing volumes generated globally. Consequently, exploring alternative methods, such distributed by additive manufacturing, becomes paramount. This innovative approach encompasses actively involving communities practices promotes economy. comprehensive review paper aims explore critical aspects necessary realize potential manufacturing. In this paper, our focus lies on proposing schemes that leverage existing literature harness manufacturing an effective We intricacies process, optimize 3D printing parameters, challenges, evaluate mechanical properties recycled materials. Our investigation draws heavily from last five years, we conduct thorough assessment DRAM implementation its influence structures. Through analysis, reveal materials delivering functional components, with insights into their performance, strengths, weaknesses. serves guide those interested embracing transformative recycling. By fostering community engagement, optimizing processes, incorporating suitable additives, it is possible collectively contribute more future while combatting crisis. As progress made, essential further delve complexities material behavior, techniques, long-term durability printed components. addressing these challenges head-on, feasible refine advance viable pathway minimize cultivating cleaner planet generations come.
Язык: Английский
Процитировано
59
Synthesis, Год журнала: 2023, Номер 55(16), С. 2439 - 2459
Опубликована: Май 3, 2023
Abstract Although known for millennia, it is only recently that mechanochemistry has received serious attention by chemists. Indeed, during the past 15 years an extraordinary number of reports concerning solid-state chemical transformations through grinding and milling techniques have been recorded. This short review discusses circumstances led this renaissance, highlighting present intense interest in so-called green chemistry, enabling capacity to handle insoluble substrates, identification profound influence additives can on mechanochemically activated reactions. The core account focuses salient developments synthetic organic especially amino acid peptide mechanosynthesis, successful employment mechanochemical activation combination with asymmetric organocatalysis, promising enzymatic whole cell biocatalysis, remarkable achievement multicomponent selective reactions via complex, multistep reaction pathways, mechanosynthesis representative heterocycles. final section comments some pending tasks area, such as scaling-up processes be practical use industry, requirement easier more efficient control parameters monitoring devices, consequently careful analysis additional procedures a proper understanding phenomena. 1 Introduction 2 Brief History Mechanochemistry 3 Milling Equipment Reaction Parameters 4 Attributes That Propelled Its Present Renaissance 4.1 Enormous Attention Being Presently Paid Sustainable Chemistry 4.2 Reduced Energy Consumption 4.3 Additive-Based 4.4 Handling Insoluble Reactants 4.5 ‘Impossible’ Reactions Are Successful 4.6 Air- Water-Sensitive Reagents Ball 5 Salient Developments Mechanochemical Activation Synthetic Organic 5.1 Amino Acid Peptide Mechanosynthesis 5.2 Asymmetric Synthesis Organocatalysis under Ball-Milling Conditions 5.3 Mechanoenzymology 5.4 Multicomponent Activated 5.5 Heterocycles Modification 6 Future Directions 6.1 Scaling-Up Protocols 6.2 Temperature-Controlled 6.3 Understanding Transformations 6.4 Emerging Techniques 7 Conclusions
Язык: Английский
Процитировано
52
Polymer Journal, Год журнала: 2024, Номер 56(4), С. 249 - 268
Опубликована: Янв. 12, 2024
Abstract Over 8 billion tons of plastic have been produced to date, and a 100% reclamation recycling strategy is not foreseeable. This review summarizes how the mechanochemistry polymers may contribute sustainable polymer future by controlling degradation only de novo developed designer but also plastics in existing waste streams. The historical development presented while highlighting current examples mechanochemically induced degradation. Additionally, theoretical computational frameworks are discussed that lead discovery better understanding new mechanochemical reactions future. takes into account technical engineering perspectives converging fields trituration with particular focus on fate commodity potential technologies monitor they occur. Therefore, unique perspective multiple communities presented, need for transdisciplinary research tackle high-leverage parameters governing an eventually successful approach circular economy.
Язык: Английский
Процитировано
29
Nature Chemistry, Год журнала: 2024, Номер 16(7), С. 1184 - 1192
Опубликована: Апрель 12, 2024
Abstract Polymers that degrade on demand have the potential to facilitate chemical recycling, reduce environmental pollution and are useful in implant immolation, drug delivery or as adhesives debond demand. However, polymers made by radical polymerization, which feature all carbon-bond backbones constitute most important class of polymers, proven difficult render degradable. Here we report cyclobutene-based monomers can be co-polymerized with conventional impart resulting mechanically triggered degradability. The cyclobutene residues act mechanophores undergo a ring-opening reaction, causes rearrangement renders polymer chains cleavable hydrolysis under basic conditions. These broadly applicable free controlled polymerizations, introduce functional groups into backbone allow gated degradation high-molecular-weight materials cross-linked networks low-molecular-weight species.
Язык: Английский
Процитировано
20
Chemical Science, Год журнала: 2023, Номер 15(3), С. 832 - 853
Опубликована: Дек. 5, 2023
Insight into the thermodynamics and kinetics of depolymerization to understand barriers that prevent effective monomer regeneration from vinyl polymers, an exploration overcoming these limitations.
Язык: Английский
Процитировано
43
Environmental Research, Год журнала: 2023, Номер 242, С. 117716 - 117716
Опубликована: Ноя. 22, 2023
Язык: Английский
Процитировано
26
Green Chemistry, Год журнала: 2024, Номер 26(5), С. 2384 - 2420
Опубликована: Янв. 1, 2024
While our society is facing the challenge of accumulating plastic waste, this review discusses recent advances towards polymer circularity with an emphasis on manipulations monomer–polymer equilibrium to create chemically recyclable polymers.
Язык: Английский
Процитировано
18
Industrial & Engineering Chemistry Research, Год журнала: 2024, Номер 63(3), С. 1200 - 1214
Опубликована: Янв. 10, 2024
Cross-linked polyethylene is one of the most widely used thermosetting plastics. Due to its low cost, lightweight, and exceptional insulation properties against electricity heat, it frequently as an material for wires cables. This polymer attracted interest in several different applications, including building services, piping systems, hydronic radiant heating, cooling etc. However, because XLPE a plastic with limited fluidity poor moldability, recycling this cross-linked form extremely important. irreversible covalent cross-linking, very challenging task, can contribute serious environmental issues, soil air pollution industrial waste buried landfills or removed by incineration. Therefore, kind network structure highly problematic. we need energy-efficient, cost-effective, eco-friendly process safeguard our ecosystem. In article, are systematically reviewing recent advances XLPE. The major challenges also discussed.
Язык: Английский
Процитировано
14
Macromolecules, Год журнала: 2024, Номер 57(7), С. 3131 - 3137
Опубликована: Март 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.
Язык: Английский
Процитировано
13
International Journal of Molecular Sciences, Год журнала: 2024, Номер 25(3), С. 1647 - 1647
Опубликована: Янв. 29, 2024
The low percentage of recyclability the polymeric materials obtained by olefin transition metal (TM) polymerization catalysis has increased interest in their substitution with more eco-friendly reliable physical and mechanical properties. Among variety known biodegradable polymers, linear aliphatic polyesters produced ring-opening (ROP) cyclic esters occupy a prominent position. polymer properties are highly dependent on macromolecule microstructure, control stereoselectivity is necessary for providing precise finely tuned In this review, we aim to outline main synthetic routes, also applications three commercially available materials: Polylactic acid (PLA), Poly(Lactic-co-Glycolic Acid) (PLGA), Poly(3-hydroxybutyrate) (P3HB), all easily accessible via ROP. framework, understanding origin enantioselectivity factors that determine it then crucial development suitable thermal
Язык: Английский
Процитировано
12