Thermally Latent Bases in Dynamic Covalent Polymer Networks and their Emerging Applications DOI
David Reisinger,

Matthias Udo Kriehuber,

Marcel Bender

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(24)

Published: March 14, 2023

A novel strategy allowing temporal control of dynamic bond exchange in covalently crosslinked polymer networks via latent transesterification catalysts is introduced. Obtained by a straightforward air- and water-tolerant synthesis, the catalyst designed for an irreversible temperature-mediated release strong organic base. Its long-term inactivity at temperatures below 50 °C provides unique opportunity to equip covalent with creep resistance high bond-exchange rates, once activated. The presented thermally base conveniently introducible readily available building blocks and, as proof concept, applied radically polymerized thiol-ene network. Light-mediated curing used 3D-printing functional objects, on which possibility spatially controlled reshaping welding based illustrated. Since activated, limitations regarding sample geometry optical transparency do not apply, facilitates transfer well-established industrial technologies. Consequently, fiber-reinforced highly filled magneto-active composites are fabricated thermal approach. on-demand activation demonstrated (magneto-assisted) experiments, highlighting wide range potential future applications offered concept.

Language: Английский

Composite Material Recycling Technology—State-of-the-Art and Sustainable Development for the 2020s DOI Open Access
Andrey E. Krauklis, Christian W. Karl, Abedin I. Gagani

et al.

Journal of Composites Science, Journal Year: 2021, Volume and Issue: 5(1), P. 28 - 28

Published: Jan. 15, 2021

Recently, significant events took place that added immensely to the sociotechnical pressure for developing sustainable composite recycling solutions, namely (1) a ban on landfilling in Germany 2009, (2) first major wave of wind turbines reaching their End-of-Life (EoL) and being decommissioned 2019–2020, (3) acceleration aircraft decommissioning due COVID-19 pandemic, (4) increase composites mass production cars, thanks development high volume technologies based thermoplastic composites. Such will only grow upcoming decade 2020s as other countries are follow by limiting banning landfill options, ever-growing number expired EoL waste. The fiber reinforced materials therefore play an important role future, particular energy, but also aerospace, automotive, construction marine sectors reduce environmental impacts meet demand. scope this manuscript is clear condensed yet full state-of-the-art overview available both low Technology Readiness Levels (TRL). TRL framework has been used many variations across industries provide measurement technology maturity from idea generation (basic principles) commercialization. In words, work should be treated review providing guidelines industry benefit society. authors propose one key aspects identify optimal methods different types Why case can answered with simple price comparison E-glass fibers (~2 $/kg) versus typical carbon market (~20 $/kg)—which two more valuable recover? However, answer complicated than that—the glass constitutes about 90% modern reinforcement market, it needed. Therefore, aims economically environmentally solutions material recycling.

Language: Английский

Citations

302
Vitrimers: Current research trends and their emerging applications DOI Creative Commons
Jie Zheng, Zhuang Mao Png, Shi Hoe Ng

et al.

Materials Today, Journal Year: 2021, Volume and Issue: 51, P. 586 - 625

Published: July 29, 2021

Language: Английский

Citations

284
Biobased vitrimers: Towards sustainable and adaptable performing polymer materials DOI Creative Commons
Matteo Andrea Lucherelli, Antoine Duval, Luc Avérous

et al.

Progress in Polymer Science, Journal Year: 2022, Volume and Issue: 127, P. 101515 - 101515

Published: Jan. 12, 2022

Language: Английский

Citations

199
Elastic vitrimers: Beyond thermoplastic and thermoset elastomers DOI Creative Commons
Jiancheng Luo, Zoriana Demchuk, Xiao Zhao

et al.

Matter, Journal Year: 2022, Volume and Issue: 5(5), P. 1391 - 1422

Published: May 1, 2022

Language: Английский

Citations

172
Neighboring Group Participation and Internal Catalysis Effects on Exchangeable Covalent Bonds: Application to the Thriving Field of Vitrimer Chemistry DOI
Florian Cuminet, Sylvain Caillol, Éric Dantras

et al.

Macromolecules, Journal Year: 2021, Volume and Issue: 54(9), P. 3927 - 3961

Published: April 19, 2021

Vitrimers constitute a fascinating class of polymer materials that make the link between historically opposed 3D networks (thermosets) and linear polymers (thermoplastics). Their chemical resistance, reshaping ability, unique rheological behavior upon heating them promising for future applications in industry. However, many vitrimers require use high catalyst loadings, which raises concerns their durability limits potential applications. To cope with this issue, internal catalysis neighboring group participation (NGP) can be used to enhance ability such materials. A few studies report effect activating groups on exchange reactions vitrimers. Nevertheless, knowledge topic remains scarce, although research would greatly benefit from NGP already known organic chemistry. The present Perspective presents different types exchangeable bonds implemented discusses have or potentially capable an enhancing reactions. This analysis is underpinned by thorough mechanistic discussion various presented.

Language: Английский

Citations

146
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

132
A Review of Multi-Material 3D Printing of Functional Materials via Vat Photopolymerization DOI Open Access
Usman Shaukat, Elisabeth Rossegger, Sandra Schlögl

et al.

Polymers, Journal Year: 2022, Volume and Issue: 14(12), P. 2449 - 2449

Published: June 16, 2022

Additive manufacturing or 3D printing of materials is a prominent process technology which involves the fabrication layer-by-layer point-by-point in subsequent manner. With recent advancements additive manufacturing, has excited great potential for extension simple designs to complex multi-material geometries. Vat photopolymerization subdivision possesses many attractive features, including excellent resolution, high dimensional accuracy, low-cost and ability spatially control material properties. However, currently limited by design strategies, chemistries, equipment limitations. This review aims provide readers with comprehensive comparison different technologies along detailed knowledge on advances vat technologies. Furthermore, we describe popular chemistries both from past more recently, future prospects address material-related limitations photopolymerization. Examples impressive capabilities inspired nature are applicable today multiple areas life briefly presented applications section. Finally, our point view printed structures as well way forward towards promising further

Language: Английский

Citations

126
Debondable adhesives and their use in recycling DOI Creative Commons
Kira R. Mulcahy, Alexander F. R. Kilpatrick, Gavin Harper

et al.

Green Chemistry, Journal Year: 2021, Volume and Issue: 24(1), P. 36 - 61

Published: Nov. 22, 2021

Structural adhesives are commonly used to join dissimilar materials and of particular interest in complex technological devices but their use makes recycling difficult.

Language: Английский

Citations

107
Transcarbamoylation in Polyurethanes: Underestimated Exchange Reactions? DOI
Camille Bakkali‐Hassani, Dimitri Berne, Vincent Ladmiral

et al.

Macromolecules, Journal Year: 2022, Volume and Issue: 55(18), P. 7974 - 7991

Published: Sept. 5, 2022

While transesterification has been largely explored by chemists, only a few studies comparatively dealt with its "sluggish cousin", transcarbamoylation. Originally suggested 70 years ago to explain the stress decay observed at high temperature in polyurethane chemical networks, transcarbamoylation─also called transurethanization or urethane exchange─is still underexploited both organic and polymer chemistry. This is mainly related use of toxic reactants such as isocyanates tin-based catalysts involved during preparation molecular carbamates polyurethanes (PUs) well harsh conditions required observe exchanges transformations. Many have focused their interest alternatives isocyanates, underestimating potential transcarbamoylation produce, recycle, reprocess PUs (wastes). Perspective presents latest developments plausible future directions prepare sustainable PU-based materials using focus on covalent dynamic networks.

Language: Английский

Citations

87
Biobased Transesterification Vitrimers DOI Creative Commons
Ashwani Kumar, Luke A. Connal

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

67