Industrial Crops and Products, Journal Year: 2021, Volume and Issue: 171, P. 113978 - 113978
Published: Aug. 27, 2021
Language: Английский
Macromolecular Rapid Communications, Journal Year: 2022, Volume and Issue: 43(13)
Published: Jan. 26, 2022
Turning thermosets into fully sustainable materials requires utilization of biobased raw and design for easy recyclability. Here, dynamic covalent chemistry fabrication adaptable networks (CANs) could be an enabling tool. CAN ideally combine the positive material properties with thermal recyclability linear thermoplastics. Among bonds, imine bond, also called Schiff base, can participate in both dissociative associative pathways. This induces potential chemical recyclability, reprocessability self-healing. review presents overview current research front fabricated by base chemistry. The discussed are categorized on basis employed components. approaches synthesis curing resins, as well resulting obtained described discussed. Finally, challenges future perspectives briefly summarized.
Language: Английский
Citations
96
Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(9)
Published: Jan. 4, 2022
We report a straightforward chemical strategy to tackle current challenges of irreversible deformation in low Tg vitrimers at operating temperature. In particular, vinylogous urethane (VU) were prepared where reactive free amines, necessary for material flow, temporarily shielded inside the network backbone, by adding small amount dibasic ester curing mixture. The amines could be released as chain ends from resulting dicarboxamide bonds via thermally reversible cyclisation an imide moiety. Indeed, (re)generation required nucleophilic defects ensured reprocessing and rapid flow higher temperature, exchange dynamics are (re)activated. As result, VU obtained with limited creep service yet good reprocessability elevated temperatures. Thus, exerting strong control on molecular level over availability exchangeable functional groups, remarkable improvement properties was obtained.
Language: Английский
Citations
93
ACS Materials Letters, Journal Year: 2022, Volume and Issue: 4(4), P. 554 - 571
Published: March 1, 2022
The huge consumption and rapid expansion of polymeric materials in the world have caused pervasive environmental pollution severe waste material resources, urging development sustainable substitutes that are repeatedly healable recyclable. In past two decades, significant progress has been made recyclable polymers based on reversible noncovalent and/or dynamic covalent cross-linking polymer chains. This Perspective focuses achievements mechanically robust dynamically cross-linked with healability recyclability. strategies for reinforcement healable/recyclable highlighted, considering generally exhibit low mechanical robustness. upon heating under mild conditions also summarized. emerging applications further demonstrated. Outlooks provided to envision remaining challenges practical materials.
Language: Английский
Citations
87
Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 52(2), P. 836 - 862
Published: Dec. 23, 2022
Fossil resources are rapidly depleting, forcing researchers in various fields of chemistry and materials science to switch the use renewable sources development corresponding technologies. In this regard, field sustainable is experiencing an extraordinary surge interest recent times due significant advances made new polymers with desired controllable properties. This review summarizes important scientific reports dedicated synthesis, construction computational studies novel polymeric containing unchanged (pseudo)aromatic furan cores their structure. Linear for thermoplastics, branched thermosets other crosslinked emerging highlight. Various polymer blends composites based on polyfurans also considered as pathways achieve high-value-added products.
Language: Английский
Citations
79
ACS Sustainable Chemistry & Engineering, Journal Year: 2022, Volume and Issue: 10(2), P. 1036 - 1046
Published: Jan. 2, 2022
Thermosets are important commodity polymeric materials, but they rarely biorenewable and recyclable. Although some previously reported bio-based aromatic thermosets with a high content have good thermal/mechanical properties, the mechanical properties of fully vitrimers relatively poor owing to low contents. To address this issue, vanillin-based dialdehyde trialdehyde containing were synthesized, renewable diamines short aliphatic chains carefully screened. Then, prepared via Schiff base reaction between aldehydes diamines. Attributed (59.2–61.3 wt %), performances these significantly improved, demonstrating comparable traditional higher than any [high (σ = 58.0 MPa; E′ 3.07 GPa)]. In addition, it could be completely degraded under mild acidic conditions. This expands end-of-life options such as recovery monomers. More importantly, demonstrated excellent closed-loop recyclability without changing their chemical structures after repolymerization commonly used approaches, thermomechanical recycling recycling. Even three hot-pressing cycles, ratio tensile strength was 84%, which even better results many reprocessable thermoplastics. Therefore, expected alternatives in future.
Language: Английский
Citations
75
Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 52(1), P. 277 - 317
Published: Dec. 15, 2022
The review presents the synthesis, properties and applications of sustainable cycloaliphatic polyurethanes from various renewable building blocks such as biobased terpenes, carbohydrates, fatty acids cholesterol or plastic wastes derivatives.
Language: Английский
Citations
75
Macromolecular Rapid Communications, Journal Year: 2023, Volume and Issue: 44(7)
Published: Jan. 20, 2023
Abstract The rapid increase in the use of plastics and related sustainability issues, including depletion global petroleum reserves, have rightly sparked interest biobased polymer feedstocks. Thermosets cannot be remolded, processed, or recycled, hence reused because their permanent molecular architecture. Vitrimers emerged as a novel family capable bridging difference between thermoplastic thermosets. enable unique recycling strategies, however, it is still important to understand where raw material feedstocks originate from. Transesterification vitrimers derived from renewable resources are massive opportunity, limited research has been conducted this specific vitrimers. This review article provides comprehensive overview transesterification produced monomers. focus on biomass structural suitability with dynamic covalent chemistry, well viability synthetic methods.
Language: Английский
Citations
59
ACS Sustainable Chemistry & Engineering, Journal Year: 2023, Volume and Issue: 11(15), P. 6100 - 6113
Published: April 5, 2023
Non-isocyanate polyurethanes (NIPUs) from renewable resources have attracted wide attention because of their remarkable benefits to sustainable development and green production. In this work, a strong, self-healing, catalyst-free NIPU (ECMP) was prepared based on the hyperbranched bio-based cyclic carbonate (Ec-MTDA) synthesized through catalytic carbonization 1,8-menthane diamine (MTDA) CO2. The rigid structures ECMP enable improved mechanical properties that high tensile strength up 34.9 MPa can be achieved. Benefiting dynamic transesterification reaction between carbamate hydroxyl groups, presents favorable reprocessing properties, shape memory. Notably, 91% original recovered after self-healing behavior. addition, abundant polar groups provide excellent adhesion for with shear 7.09 MPa. This study provides promising strategy design NIPUs, which broadens applications in printing, furniture, packaging, other industries.
Language: Английский
Citations
57
Progress in Polymer Science, Journal Year: 2024, Volume and Issue: 152, P. 101816 - 101816
Published: March 26, 2024
Permanent polymer networks present an important sustainability challenge. Irreversible covalent crosslinks impart these materials excellent mechanical properties, thermal and chemical resistance, yet also render them difficult to repair recycle. Self-healing mechanisms can extend the lifetime of thermosets elastomers, improving their durability making lifecycle more sustainable. In addition extension, this paper reviews self-healing polymers from a holistic point view. The entire is critically assessed with reference green chemistry principles sustainable development. relation between chemistries aspects each phases are discussed, starting feedstocks, monomer functionalisation synthesis, processing manufacturing as well end-of-life considerations, i.e. recycling or (bio)degradation. review provides toolbox for development thermosets, elastomers composites. It utmost importance consider materials, derived products – by extension any material product. ability often related recyclability should primarily reduce amount new that necessary fulfill societal needs, extending maximizing reprocessing into products. Increasing healing efficiency number cycles improves overall environmental impact relative extended service lifetime. Renewable resources biomass, processes waste streams be first choice create polymers. Finally, biodegradability considered complementary scenario upon accidental loss environment, provided biodegradation does not start under prospected use conditions products, but postponed until contact stimuli in environment.
Language: Английский
Citations
19
Green Chemistry, Journal Year: 2024, Volume and Issue: 26(16), P. 8894 - 8941
Published: Jan. 1, 2024
This review represents an overview of the status quo furan-based monomers and related bio-based polymers, highlighting key challenges for scaling from lab to pre-industrial levels.
Language: Английский
Citations
17