Green Chemistry, Journal Year: 2023, Volume and Issue: 25(23), P. 9998 - 10009
Published: Jan. 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.
Language: Английский
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
116
Macromolecules, Journal Year: 2024, Volume and Issue: 57(5), P. 1919 - 1940
Published: Feb. 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.
Language: Английский
Citations
36
Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(9), P. 2803 - 2841
Published: Aug. 12, 2024
Language: Английский
Citations
22
Recycling, Journal Year: 2024, Volume and Issue: 9(3), P. 37 - 37
Published: May 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.
Language: Английский
Citations
19
Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(23)
Published: April 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.
Language: Английский
Citations
41
Green Chemistry, Journal Year: 2023, Volume and Issue: 26(2), P. 571 - 592
Published: Nov. 22, 2023
Catalytic depolymerization of polyester plastics toward closed-loop recycling and upcycling
Language: Английский
Citations
39
Progress in Polymer Science, Journal Year: 2023, Volume and Issue: 149, P. 101781 - 101781
Published: Dec. 27, 2023
Language: Английский
Citations
32
Polymer Degradation and Stability, Journal Year: 2022, Volume and Issue: 204, P. 110116 - 110116
Published: Aug. 17, 2022
Language: Английский
Citations
19
ACS Applied Materials & Interfaces, Journal Year: 2022, Volume and Issue: 15(1), P. 2246 - 2255
Published: Dec. 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.
Language: Английский
Citations
18
Macromolecules, Journal Year: 2022, Volume and Issue: 55(21), P. 9697 - 9704
Published: Oct. 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.
Language: Английский
Citations
17