Green Chemistry, Год журнала: 2023, Номер 25(23), С. 9998 - 10009
Опубликована: Янв. 1, 2023
This work provides a strategy for synthesizing PGA-PBC-PGA triblock copolymers and allows the recovery of GL within 3.0 h through depolymerization in an 82% yield.
Язык: Английский
Chemical Reviews, Год журнала: 2024, Номер 124(7), С. 4393 - 4478
Опубликована: Март 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.
Язык: Английский
Процитировано
116
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
35
Recycling, Год журнала: 2024, Номер 9(3), С. 37 - 37
Опубликована: Май 6, 2024
This review article gathers the most recent recycling technologies for thermoset and thermoplastic polymers. Results about existing experimental procedures their effectiveness are presented. For polymers, focuses mainly on fibre-reinforced polymer composites, with an emphasis epoxy-based systems carbon/glass fibres as reinforcement, due to environmental concerns of end-of-life management. Thermal processes (fluidised bed, pyrolysis) chemical (different types solvolysis) discussed. The combined (microwave, steam, ultrasonic assisted techniques) extraordinary attempts (electrochemical, biological, ionic liquids) analysed. Mechanical that leads downgrading materials is excluded. Insights also given upcycling methodologies have been implemented until now reuse fibres. As state-of-the-art approach common matrices presented, together appropriate additivation matrix upcycling. Mechanical, chemical, enzymatic described, among others. use composites quite new, thus, achievements With all above information, this extensive can serve a guide educational purposes, targeting students technicians in polymers recycling.
Язык: Английский
Процитировано
19
Science China Chemistry, Год журнала: 2024, Номер 67(9), С. 2803 - 2841
Опубликована: Авг. 12, 2024
Язык: Английский
Процитировано
19
Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(23)
Опубликована: Апрель 5, 2023
Although great successes have been achieved, the preparation of closed-loop recyclable polyesters with high working temperatures still remains as a big challenge. Herein, we present syntheses series enantiopure bicyclic ether-ester monomers by upcycling poly(3-hydroxybutyrate) bioplastic. The "living"/controlled ring-opening polymerizations these to produce stereoregular controlled molecular weights and well-defined chain ends were achieved. effects stereoconfiguration substituent on polymerization kinetics thermodynamics well thermal properties resultant investigated. Of note, are semi-crystalline materials melting up 176 °C, even higher than commodity polyolefin plastics. These can be depolymerized back recover pristine monomers, thus successfully establishing life cycle.
Язык: Английский
Процитировано
41
Green Chemistry, Год журнала: 2023, Номер 26(2), С. 571 - 592
Опубликована: Ноя. 22, 2023
Catalytic depolymerization of polyester plastics toward closed-loop recycling and upcycling
Язык: Английский
Процитировано
39
Progress in Polymer Science, Год журнала: 2023, Номер 149, С. 101781 - 101781
Опубликована: Дек. 27, 2023
Язык: Английский
Процитировано
31
Polymer Degradation and Stability, Год журнала: 2022, Номер 204, С. 110116 - 110116
Опубликована: Авг. 17, 2022
Язык: Английский
Процитировано
19
ACS Applied Materials & Interfaces, Год журнала: 2022, Номер 15(1), С. 2246 - 2255
Опубликована: Дек. 23, 2022
In the current context of sustainable chemistry development and new regulations, aminolysis cyclic carbonate is one most promising routes to nonisocyanate polyurethanes, also called polyhydroxyurethanes (PHU). this study, a kind shape memory PHU vitrimers with outstanding mechanical properties chemical recyclability prepared. The monomer employed for form PHUs bis(six-membered carbonate) 4,4'-biphenol (BCC-BP), which synthesized by bi(1,3-diol) precursors CO2. synthetic strategy, isocyanate-free employing CO2 as building block, environmentally friendly suits concept carbon neutrality. thermal properties, dynamic behaviors are explored. maximum breaking strength elongation at break resultant reach 65 MPa 452%, respectively, exceeding other reported PHU-based materials in combined performance. Such material can lift up load 4700 times heavier than its own weight recovery process. Finally, be regenerated through alcoholysis realize recycling. This work provides feasibility study green approach designing novel properties.
Язык: Английский
Процитировано
18
Macromolecules, Год журнала: 2022, Номер 55(21), С. 9697 - 9704
Опубликована: Окт. 20, 2022
The upcycling of plastic waste into value-added products is a promising strategy to reduce pollution and create sustainable style for polymeric materials. We report here the synthesis novel N-heterocyclic lactone, 5-methyl-N-Boc-1,4-oxazepane-7-one (MeOxPBoc) corresponding poly(amine-alt-ester) through poly(3-hydroxybutyrate) (P3HB) biopolymer. Specifically, tens grams MeOxPBoc can be easily prepared from P3HB in satisfactory yield. Well-controlled ring-opening polymerization (ROP) was achieved give an amorphous P(MeOxPBoc) with targeted molecular weight, narrow weight dispersity, well-defined terminal groups toluene using stannous 2-ethyl hexanoate (Sn(Oct)2) as catalyst. obtained could depolymerized back its pristine monomer either trimethylbenzene at 120 °C Sn(Oct)2 catalyst or bulk 150 presence ZnCl2 After simple purification by recrystallization, recycled repolymerized produce virgin-quality polymers. Remarkably, converted cationic polymer simply removing pendent t-butoxycarbonyl protecting group. This study provides new insight address end-of-use problem functional closed-loop life cycle.
Язык: Английский
Процитировано
17