Polybenzoxazine-based covalent adaptable networks: A mini-review DOI Creative Commons
Antoine Adjaoud, Laura Puchot, Pierre Verge

et al.

Polymer, Journal Year: 2023, Volume and Issue: 287, P. 126426 - 126426

Published: Oct. 25, 2023

Benzoxazines represent a class of thermoset resins known for their exceptional thermal, fire, and mechanical properties. These find wide applications in various industries, including composites electronic components. However, like conventional thermosets, benzoxazines have limitations terms end-of-life options, typically being landfilled or incinerated. To address this concern, researchers been exploring the incorporation dynamic bonds into structure polybenzoxazines to add functionalities such as reprocessability, self-healing, recycling capabilities, develop polybenzoxazine-based covalent adaptable networks (CANs). This mini-review offers an overview recent endeavors focused on introduction within polybenzoxazine structures. It emphasizes synergies between molecular exchanges, transesterification disulfide metathesis, provides comparative summary properties achieved by materials developed context. By leveraging strengths benzoxazine structures, aims foster exploration development innovative approaches that combine unique CANs, enabling more sustainable environmentally friendly materials.

Language: Английский

Vitrimer composites: current status and future challenges DOI Creative Commons

Vincent Schenk,

Karine Labastié,

Mathias Destarac

et al.

Materials Advances, Journal Year: 2022, Volume and Issue: 3(22), P. 8012 - 8029

Published: Jan. 1, 2022

Vitrimers: one step towards a greener future for the composite industry?

Language: Английский

Citations

122
A Highly Dynamic Covalent Polymer Network without Creep: Mission Impossible? DOI
Filip Van Lijsebetten, Tapas Debsharma, Johan M. Winne

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(48)

Published: Sept. 26, 2022

Dynamic covalent polymer networks provide an interesting solution to the challenging recyclability of thermosets and elastomers. One remaining design constraints, however, is balancing thermal reprocessability in form material flow with dimensional stability during use. As a result, many chemistries are being investigated order improve bond reactivity control robustness. This Minireview highlights number promising concepts, particular emphasis on disconnecting chemical low high temperature regimes obtain creep resistant, yet highly dynamic networks. In addition, we will highlight impact sharp changes when applying extrapolation-based approaches rheological analysis. confident that abandoning myth "permanent" aid development sustainable polymeric materials can truly combine benefits thermoplastic thermoset behaviour.

Language: Английский

Citations

93
Circularity in polymers: addressing performance and sustainability challenges using dynamic covalent chemistries DOI Creative Commons
Tianwei Yan, Alex H. Balzer, Katie M. Herbert

et al.

Chemical Science, Journal Year: 2023, Volume and Issue: 14(20), P. 5243 - 5265

Published: Jan. 1, 2023

This review provides a multidisciplinary overview of the challenges and opportunities for dynamic covalent chemistry-based macromolecules towards design new, sustainable, recyclable materials circular economy.

Language: Английский

Citations

46
Strong yet Tough Catalyst‐Free Transesterification Vitrimer with Excellent Fire‐Retardancy, Durability, and Closed‐Loop Recyclability DOI Creative Commons
Guofeng Ye, Siqi Huo, Cheng Wang

et al.

Small, Journal Year: 2024, Volume and Issue: 20(45)

Published: July 31, 2024

Despite great advances in vitrimer, it remains highly challenging to achieve a property portfolio of excellent mechanical properties, desired durability, and high fire safety. Thus, catalyst-free, closed-loop recyclable transesterification vitrimer (TPN

Language: Английский

Citations

36
Ultrastrong and Thermo‐Remoldable Lignin‐Based Polyurethane Foam Insulation with Active‐Passive Fire Resistance DOI
Lichao Sun,

Yujia Guo,

Rongxian Ou

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(40)

Published: June 19, 2024

Abstract Foam thermal insulators are indispensable for prevailing energy‐saving engineering, however their widespread use brings intractability such as unsustainability, “white pollution”, and fire hazards. The emergence of bio‐based foams is highly appreciated, but the fabrication approaches economically unattractive and/or product properties inferior, making large‐scale implementation unviable. Herein, a versatile, thermally remoldable phosphate‐containing polyurethane composite foam (LPU‐G) constructed from natural lignin expanded graphite flakes via an atmospheric pressure scalable one‐pot strategy. optimal LPU‐G exhibits exceptional mechanical strength, capable supporting over 6000 times its weight without significant deformation. Moreover, demonstrates desired multifunctionality in handling extreme circumstances, including humidity‐tolerant insulation, superb water vapor barrier, withstanding ≈1200 °C flame ignition. Based on “expansion‐conductivity” micro‐mechanism, first material to be sensitive alarm system with ultra‐long time (>1800 s). Surprisingly, can rapidly upcycled into recyclable bulk composites second life through simple thermo‐molding processes rooted multi‐dynamic behavior phosphate, carbamate, hydrogen bonds. easy‐to‐scale represents new generation that address concerns regarding high cost, risk, inferior properties.

Language: Английский

Citations

21
Taking dynamic covalent chemistry out of the lab and into reprocessable industrial thermosets DOI
Stephan Maes, Nezha Badi, Johan M. Winne

et al.

Nature Reviews Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 31, 2025

Language: Английский

Citations

3
Fluoride‐Catalyzed Siloxane Exchange as a Robust Dynamic Chemistry for High‐Performance Vitrimers DOI Creative Commons

Chase A. Tretbar,

Jordan Castro,

Kosuke Yokoyama

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(28)

Published: May 16, 2023

Sustainable development of new technologies requires materials having advanced physical and chemical properties while maintaining reprocessability recyclability. Vitrimers are designed for this purpose; however, their dynamic covalent chemistries often have drawbacks or limited to specialized polymers. Here, fluoride-catalyzed siloxane exchange is reported as an exceptionally robust chemistry scalable production high-performance vitrimers through industrial processing commodity polymers such poly(methyl methacrylate), polyethylene, polypropylene. The show improved resistance creep, heat, oxidation, hydrolysis, excellent melt flow recycling. Furthermore, the between different during mechanical blending results in self-compatibilized blends without any compatibilizers. This offers a general, method producing sustainable strategy recycling mixed plastic wastes.

Language: Английский

Citations

39
Remolding and Deconstruction of Industrial Thermosets via Carboxylic Acid-Catalyzed Bifunctional Silyl Ether Exchange DOI
Keith E. L. Husted, Christopher M. Brown, Peyton Shieh

et al.

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(3), P. 1916 - 1923

Published: Jan. 13, 2023

Convenient strategies for the deconstruction and reprocessing of thermosets could improve circularity these materials, but most approaches developed to date do not involve established, high-performance engineering materials. Here, we show that bifunctional silyl ether, i.e., R'O-SiR2-OR'', (BSE)-based comonomers generate covalent adaptable network analogues industrial thermoset polydicyclopentadiene (pDCPD) through a novel BSE exchange process facilitated by low-cost food-safe catalyst octanoic acid. Experimental studies density functional theory calculations suggest an mechanism involving ester intermediates with formation rates strongly depend on Si-R2 substituents. As result, pDCPD manufactured display temperature- time-dependent stress relaxation as function their Moreover, bulk remolding is enabled first time. Altogether, this work presents new approach toward installation exchangeable bonds into commercial establishes acid-catalyzed versatile addition toolbox dynamic chemistry.

Language: Английский

Citations

38
Reversible Amidation Chemistry Enables Closed‐Loop Chemical Recycling of Carbon Fiber Reinforced Polymer Composites to Monomers and Fibers DOI Open Access
Bo Qin, Siyuan Liu, Jiang‐Fei Xu

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(43)

Published: Sept. 7, 2023

Highly efficient recycling of carbon fiber reinforced polymer composites into monomers and fibers is a formidable challenge. Herein, we present closed-loop approach for using reversible amidation chemistry, which enables the complete recovery intact pure monomers. The network, synthesized by between macromonomer linear polyethyleneimine bifunctional maleic anhydride cross-linker, serves as matrix construction with exceptional mechanical properties, thermal stability solvent resistance. matrices can be fully depolymerized under acidic condition at ambient temperature, allowing effective separation both two reclaimed retain nearly identical properties to pristine ones, while are recycled high yields (>93 %). They reused in multiple cycles manufacture new composites, whose recover over 95 % their original properties. This line research presents promising design high-performance sustainable thermoset offering significant environmental economic benefits.

Language: Английский

Citations

35
Reprocessible Triketoenamine‐Based Vitrimers with Closed‐Loop Recyclability DOI

Z. G. Hu,

Fan Hu,

Lifeng Deng

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(34)

Published: June 14, 2023

Development of thermosets that can be repeatedly recycled via both chemical route (closed-loop) and thermo-mechanical process is attractive remains an imperative task. In this work, we reported a triketoenamine based dynamic covalent network derived from 2,4,6-triformylphloroglucinol secondary amines. The resulting does not have intramolecular hydrogen bonds, thus reducing its π-electron delocalization, lowering the stability tautomer structure, enabling feature. By virtue highly reversible bond exchange, novel enables easy construction crosslinked chemically reprocessable networks commercially available monomers. as-made polymer monoliths exhibit high mechanical properties (tensile strength 79.4 MPa Young's modulus 571.4 MPa) undergo monomer-network-monomer (yields up to 90 %) recycling mediated by aqueous solution, with new-generation capable restoring material original state. addition, owing nature, catalyst-free low-temperature reprogrammable adaptable (vitrimer) was achieved. design concept herein applied development other vitrimers repressibility recyclability, sheds light on future sustainable polymers minimal environmental impact.

Language: Английский

Citations

23