Stapler Strategies for Upcycling Mixed Plastics DOI
Chen Zou, Jiawei Chen, Muhammad Asadullah Khan

и другие.

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(28), С. 19449 - 19459

Опубликована: Июль 2, 2024

Mechanical recycling is one of the simplest and most economical strategies to address ever-increasing plastic pollution, but it cannot be applied immiscible mixed plastics suffers from property deterioration after each cycle. By combining amphiphilic block copolymer strategy reactive compatibilization strategy, we designed a series stapler for compatibilizing/upcycling plastics. First, various functionalized graft copolymers were accessed via different synthetic routes. Subsequently, addition very small amount molecules induced synergistic effect with that improved compatibility mechanical properties These highly effective binary/ternary systems can directly postconsumer waste plastics, which increase toughness by 162 times. Most importantly, also effectively impact resistance, adhesion performance, three-dimensional (3D) printing performance permitted blends 20 times minimal degradation in their properties.

Язык: Английский

Chemical upcycling of polyethylene, polypropylene, and mixtures to high-value surfactants DOI
Zhen Xu, Nuwayo Eric Munyaneza, Qikun Zhang

и другие.

Science, Год журнала: 2023, Номер 381(6658), С. 666 - 671

Опубликована: Авг. 10, 2023

Conversion of plastic wastes to fatty acids is an attractive means supplement the sourcing these high-value, high-volume chemicals. We report a method for transforming polyethylene (PE) and polypropylene (PP) at ~80% conversion with number-average molar masses up ~700 670 daltons, respectively. The process applicable municipal PE PP their mixtures. Temperature-gradient thermolysis key controllably degrading into waxes inhibiting production small molecules. are upcycled by oxidation over manganese stearate subsequent processing. ꞵ-scission produces more olefin wax yields higher acid-number than does ꞵ-scission. further convert large-market-volume surfactants. Industrial-scale technoeconomic analysis suggests economic viability without need subsidies.

Язык: Английский

Процитировано

130

Plastic waste recycling is gaining momentum DOI
Kevin M. Van Geem

Science, Год журнала: 2023, Номер 381(6658), С. 607 - 608

Опубликована: Авг. 10, 2023

Production of detergents and aldehydes could help tackle plastic pollution.

Язык: Английский

Процитировано

53

Synthesis and Deconstruction of Polyethylene-type Materials DOI Creative Commons
Simon T. Schwab, Maximilian Baur, Taylor F. Nelson

и другие.

Chemical Reviews, Год журнала: 2024, Номер 124(5), С. 2327 - 2351

Опубликована: Фев. 26, 2024

Polyethylene deconstruction to reusable smaller molecules is hindered by the chemical inertness of its hydrocarbon chains. Pyrolysis and related approaches commonly require high temperatures, are energy-intensive, yield mixtures multiple classes compounds. Selective cleavage reactions under mild conditions (

Язык: Английский

Процитировано

43

Light-driven polymer recycling to monomers and small molecules DOI Creative Commons
Laura Wimberger,

Gervase Ng,

Cyrille Boyer

и другие.

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 20, 2024

Abstract Only a small proportion of global plastic waste is recycled, which most mechanically recycled into lower quality materials. The alternative, chemical recycling, enables renewed production pristine materials, but generally comes at high energy cost, particularly for processes like pyrolysis. This review focuses on light-driven approaches chemically recycling and upcycling waste, with emphasis reduced consumption selective transformations not achievable heat-driven methods. We focus challenging to recycle backbone structures composed mainly C‒C bonds, lack functional groups i.e., esters or amides, that facilitate e.g., by solvolysis. discuss the use light, either in conjunction heat drive depolymerization monomers via photocatalysis transform polymers valuable molecules. structural prerequisites these are outlined, highlighting their advantages as well limitations. conclude an outlook, addressing key challenges, opportunities, provide guidelines future photocatalyst (PC) development.

Язык: Английский

Процитировано

33

Ring-Opening Polymerization of Lactones to Prepare Closed-Loop Recyclable Polyesters DOI
Zheng Li, Yong Shen, Zhibo Li

и другие.

Macromolecules, Год журнала: 2024, Номер 57(5), С. 1919 - 1940

Опубликована: Фев. 22, 2024

The large production and indiscriminate disposal of plastics have resulted in serious resource global environmental crises, which has raised a demand to develop more sustainable circular economy. An ideal strategy address the end-of-life issue is next-generation polymers with closed-loop life cycles, can be selectively depolymerized back monomers at end their service life. Aliphatic polyesters prepared by ring-opening polymerization (ROP) moderately strained lactones shown great potential recyclable polymers. This Perspective highlights recent achievements for that are derived from four-, five-, six-, seven-membered focusing on discussion thermodynamic kinetic considerations, monomer design principles polymer preparations, material properties, chemical recyclability. Finally, current challenges possible directions also discussed.

Язык: Английский

Процитировано

29

Recycled polymer: Green roads for polyester plastics DOI Creative Commons

Rulin Yang,

Guangqiang Xu, Wen‐Jie Tao

и другие.

Green Carbon, Год журнала: 2024, Номер 2(1), С. 1 - 11

Опубликована: Фев. 2, 2024

Plastics are integral to numerous significant social advancements. Nonetheless, their contribution environmental pollution and climate crises cannot be disregarded, as negative impact on the environment increases with incremental production capacity demand. Concerted global action is urgently required promote green recycle of plastics prevent accumulation in mitigate carbon emissions. This review aims reveal paths development for polyester plastics, incorporating trends revolution mature commercial newly emerging biodegradable future plastics. A critical discussion was conducted current potential research areas from multiple perspectives, including raw materials, processes, recycling, propel us into a marked by sustainability.

Язык: Английский

Процитировано

27

Catalytic Upcycling of Polyolefins DOI Creative Commons
Jia‐Kai Sun,

Jinhu Dong,

Lijun Gao

и другие.

Chemical Reviews, Год журнала: 2024, Номер 124(16), С. 9457 - 9579

Опубликована: Авг. 16, 2024

The large production volumes of commodity polyolefins (specifically, polyethylene, polypropylene, polystyrene, and poly(vinyl chloride)), in conjunction with their low unit values multitude short-term uses, have resulted a significant pressing waste management challenge. Only small fraction these is currently mechanically recycled, the rest being incinerated, accumulating landfills, or leaking into natural environment. Since are energy-rich materials, there considerable interest recouping some chemical value while simultaneously motivating more responsible end-of-life management. An emerging strategy catalytic depolymerization, which portion C-C bonds polyolefin backbone broken assistance catalyst and, cases, additional molecule reagents. When products molecules materials higher own right, as feedstocks, process called upcycling. This review summarizes recent progress for four major upcycling strategies: hydrogenolysis, (hydro)cracking, tandem processes involving metathesis, selective oxidation. Key considerations include macromolecular reaction mechanisms relative to mechanisms, design transformations, effect conditions on product selectivity. Metrics describing critically evaluated, an outlook future advances described.

Язык: Английский

Процитировано

26

The environmental effects of microplastics and microplastic derived dissolved organic matter in aquatic environments: A review DOI

Zhu Zhichao,

Cao Xu,

K. Wang

и другие.

The Science of The Total Environment, Год журнала: 2024, Номер 933, С. 173163 - 173163

Опубликована: Май 11, 2024

Язык: Английский

Процитировано

25

Advancements and future directions in waste plastics recycling: From mechanical methods to innovative chemical processes DOI
Shaoqin Chen, Yun Hang Hu

Chemical Engineering Journal, Год журнала: 2024, Номер 493, С. 152727 - 152727

Опубликована: Июнь 1, 2024

Язык: Английский

Процитировано

25

Review on Catalytic Depolymerization of Polyolefin Waste by Hydrogenolysis: State-of-the-Art and Outlook DOI
Abdulrahman Musa,

E. A. Jaseer,

Samir Barman

и другие.

Energy & Fuels, Год журнала: 2024, Номер 38(3), С. 1676 - 1691

Опубликована: Янв. 22, 2024

Mechanical recycling of plastic waste is not sustainable and inefficient in terms the resources needed to accomplish process, quality materials obtained from this technique substandard. Chemical polymers appears be preferable because technology allows for production new materials. This review compiles most recent research which selected transition metals are used as catalysts hydrogenolytic depolymerization polyolefins a polymer upcycling process. Hydrogenolysis an emerging chemical method that uses transition-metal complexes presence hydrogen cleave C–C bonds substances into shorter hydrocarbons. Transition such Ruthenium (Ru), Platinum (Pt), Nickel (Ni), Cobalt (Co), Zirconium (Zr), Tantalum (Ta), Rhodium (Rh) have been utilized recently type reaction. hydrogenolysis can produce valuable hydrocarbon products, gas/liquid fuels lubricating oils, under relatively milder operational conditions with less environmental impact. The focused on supported metal organometal catalytic system their mechanism polyolefin pathways detailed investigation impact reaction parameters high gasoline, diesel, light lubricants.

Язык: Английский

Процитировано

22