Green Chemistry, Год журнала: 2021, Номер 23(11), С. 4065 - 4073
Опубликована: Янв. 1, 2021
The dissolution and further alkaline hydrolysis of PET in biomass-derived γ-valerolactone is realized at a relatively mild temperature high efficiency.
Язык: Английский
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
Green Chemistry, Год журнала: 2024, Номер 26(4), С. 2087 - 2093
Опубликована: Янв. 1, 2024
Mechanochemical methanolysis of polyester and polycarbonate eliminated catalyst solvent.
Язык: Английский
Процитировано
24
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
19
Polymers, Год журнала: 2025, Номер 17(5), С. 628 - 628
Опубликована: Фев. 26, 2025
The growing environmental impact of textile waste, fueled by the rapid rise in global fiber production, underscores urgent need for sustainable end-of-life solutions. This review explores cutting-edge pathways waste management, spotlighting innovations that reduce reliance on incineration and landfilling while driving material circularity. It highlights advancements collection, sorting, pretreatment technologies, as well both established emerging recycling methods. Smart collection systems utilizing tags sensors show great promise streamlining logistics automating pick-up routes transactions. For automated technologies like near-infrared hyperspectral imaging lead way accurate scalable separation. Automated disassembly techniques are effective at removing problematic elements, though other pretreatments, such color finish removal, still to be customized specific streams. Mechanical is ideal textiles with strong mechanical properties but has limitations, particularly blended fabrics, cannot repeated endlessly. Polymer recycling-through melting or dissolving polymers-produces higher-quality recycled materials comes high energy solvent demands. Chemical recycling, especially solvolysis pyrolysis, excels breaking down synthetic polymers polyester, potential yield virgin-quality monomers. Meanwhile, biological methods, their infancy, natural fibers cotton wool. When methods not viable, gasification can used convert into synthesis gas. concludes future hinges integrating sorting advancing solvent-based chemical technologies. These innovations, supported eco-design principles, progressive policies, industry collaboration, essential building a resilient, circular economy.
Язык: Английский
Процитировано
6
ChemSusChem, Год журнала: 2022, Номер 16(2)
Опубликована: Ноя. 28, 2022
Abstract Converting poly(ethylene terephthalate) (PET) into metal–organic frameworks (MOFs) has emerged as a promising innovation for upcycling of waste plastics. However, previous solvothermal methods suffer from toxic solvent consumption, long reaction time, high pressure, and temperature. Herein, mechanochemical milling strategy was reported to transform PET series MOFs with yields. This had the merits solvent‐free conditions, ambient temperature, short running easy scale‐up large‐scale production MOFs. The as‐prepared exhibited definite crystal structure porous morphology composed agglomerated nanoparticles. It proven that, under milling, firstly decomposed 1,4‐benzenedicarboxylate, which acted linkers coordinate metal ions forming fragments, followed by gradual arrangement fragments work not only promotes value‐added conversion polyesters but also offers new opportunity produce in green scalable manner.
Язык: Английский
Процитировано
49
ChemSusChem, Год журнала: 2022, Номер 16(1)
Опубликована: Сен. 27, 2022
Waste polyester textiles are not recycled due to separation challenges and partial structural degradation during use recycling. Chemical recycling of polyethylene terephthalate (PET) through depolymerization can provide a feedstock monomers make "as-new" polymers. While enzymatic PET is more selective sustainable approach, methods in development, however, have thus far been limited clean, high-quality feedstocks, require an energy-intensive melt-amorphization step ahead treatment. Here, high-crystallinity mixed PET/cotton could be directly selectively depolymerized terephthalic acid (TPA) by using commercial cutinase from Humicola insolens under moist-solid reaction conditions, affording up 30±2 % yield TPA. The process was readily combined with cotton simultaneous or sequential application the cellulase enzymes CTec2®, providing 83±4 glucose without any negative influence on TPA yield.
Язык: Английский
Процитировано
41
Chemical Engineering Science, Год журнала: 2023, Номер 276, С. 118729 - 118729
Опубликована: Апрель 7, 2023
Язык: Английский
Процитировано
37
Nature Communications, Год журнала: 2023, Номер 14(1)
Опубликована: Янв. 14, 2023
Polymers with low ceiling temperatures (Tc) are highly desirable as they can depolymerize under mild conditions, but typically suffer from demanding synthetic conditions and poor stability. We envision that this challenge be addressed by developing high-Tc polymers converted into low-Tc on demand. Here, we demonstrate the mechanochemical generation of a polymer, poly(2,5-dihydrofuran) (PDHF), an unsaturated polyether contains cyclobutane-fused THF in each repeat unit. Upon mechanically induced cycloreversion cyclobutane, unit generates three units PDHF. The resulting PDHF completely depolymerizes 2,5-dihydrofuran presence ruthenium catalyst. otherwise difficult-to-synthesize highlights power polymer mechanochemistry accessing elusive structures. concept mechanochemically regulating Tc applied to develop next-generation sustainable plastics.
Язык: Английский
Процитировано
33
Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(5), С. 113539 - 113539
Опубликована: Июль 11, 2024
Язык: Английский
Процитировано
18
ACS Materials Au, Год журнала: 2024, Номер 4(3), С. 335 - 345
Опубликована: Март 18, 2024
Polyester fibers, comprising mostly poly(ethylene terephthalate) with high crystalline content, represent the most commonly produced plastic for ubiquitous textiles, and approximately 60 million tons are manufactured annually worldwide. Considering social issues of mismanaged waste from used textile products, there is an urgent demand sustainable polyester fiber recycling methods. We developed a low-temperature, rapid, efficient depolymerization method fibers. By utilizing methanolysis dimethyl carbonate as trapping agent ethylene glycol, fibers products proceeded at 50 °C 2 h, affording terephthalate (DMT) in >90% yield. This strategy allowed us to depolymerize even practical textiles blended other selectively isolate DMT yields. was also applicable colored analytically pure isolated via decolorization processes.
Язык: Английский
Процитировано
12