Strong yet Tough Catalyst‐Free Transesterification Vitrimer with Excellent Fire‐Retardancy, Durability, and Closed‐Loop Recyclability

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

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Application and carbon footprint evaluation of lignin-based composite materials

Advanced Composites and Hybrid Materials, Journal Year: 2024, Volume and Issue: 7(2)

Published: March 18, 2024

Language: Английский

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Robust Epoxy Resins with Autonomous Visualization of Damaging‐Healing and Green Closed‐Loop Recycling

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 29, 2024

Abstract Epoxy resins‐based engineering plastics are indispensable in the global economy, but they have created a serious waste crisis caused by their chemical cross‐linked networks. To solve this problem, current strategies often require assistance of catalysts or solvents at expense thermal and mechanical performance. In work, high‐performance epoxy resin featuring dynamic ester disulfide bonds (TDS) is reported, which exhibits higher properties than common plastics, i.e., tensile strength modulus 66.6 MPa 2.63 GPa, flexural 103.2 3.52 glass transition temperature ( T g ) 133 °C. Moreover, reversible transformation between aromatic thiyl radicals endows TDS with autonomous visualization damage healing. addition, harmonious interplay bonds‐promoted tertiary amine accelerated topological network rearrangements, enabling to easily reshape weld. Specifically, can be completely degraded pure water 200 °C without any catalyst, products directly re‐polymerized achieve green closed‐loop recycling. This work proposes simple economical strategy for development resin‐based cutting‐edge that both functional sustainable.

Language: Английский

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A transparent epoxy vitrimer with outstanding flame retardancy, toughness, and recyclability enabled by a hyperbranched P/N-derived polyester

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 470, P. 140673 - 140673

Published: March 6, 2025

Language: Английский

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Large-Scale synthesis of crystalline phosphorus nanosheets with superior air-water stability and flame-retardancy ability

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159566 - 159566

Published: Jan. 1, 2025

Language: Английский

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Recycling of Epoxy Resins with Degradable Structures or Dynamic Cross-Linking Networks: A Review

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(12), P. 5005 - 5027

Published: March 19, 2024

Traditional epoxy resins (EPR), represented by bisphenol A type, have high chemical bond energy, low polarity, and stable properties. The topological structure after curing makes EPR impossible for convenient recycling through heating or dissolution like thermoplastics. This results in traditional having no advantage of efficient recycling, both molecular the combination morphology polymer chains. However, introducing degradable dynamically cross-linked structures into to modify their will bring good special responsiveness, with expectation achieve while maintaining original performance. paper reviews research progress cross-linkable such as ester, acetal, similar structures, Schiff bases, disulfide bonds, Diels–Alder addition structures. highlights impact these themselves on recycling. We discussed potential structures' findings small-molecule organic chemistry

Language: Английский

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Dynamic Covalent Bonds Enabled Carbon Fiber Reinforced Polymers Recyclability and Material Circularity

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: July 20, 2024

Due to their remarkable features of lightweight, high strength, stiffness, high-temperature resistance, and corrosion carbon fiber reinforced polymers (CFRPs) are extensively used in sports equipment, vehicles, aircraft, windmill blades, other sectors. The urging need develop a resource-saving environmentally responsible society requires the recycling CFRPs. Traditional CFRPs, on hand, difficult recycle due permanent covalent crosslinking polymer matrices. combination adaptable networks (CANs) with fibers (CFs) marks new development path for closed-loop recyclable CFRPs resins. In this review, we summarize most recent developments from unique paradigm dynamic polymers, CANs. These sophisticated materials diverse functions, oriented towards CFs resin sustainability, further categorized into several active domains bonds, including ester imine disulfide boronic acetal linkages, etc. Finally, possible strategies future design CFPRs by combining chemistry innovation interface science proposed.

Language: Английский

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Molten salt thermal treatment of carbon fiber/bisphenol A resin composites recovery: Insight into the degradation and dissolution mechanism of resin

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159615 - 159615

Published: Jan. 1, 2025

Language: Английский

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Designing Bouligand‐inspired reinforcement for creating wood fiber‐reinforced composites with excellent bending properties

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

Abstract Fiber‐reinforced composites with a bionic Bouligand structure are known for their excellent mechanical properties. Currently, most of the research in this field focuses on man‐made fibers, and natural unidirectional fiber materials is still limited. This paper designing Bouligand‐inspired reinforcement creating wood fiber‐reinforced composites. We investigate effects helix angle bending properties, impact resistance extreme environments material through combination experimental methods, finite element analysis, theoretical modeling. Morphological analysis using scanning electron microscopy (SEM) to further explore fracture mechanisms. The findings reveal that load–displacement curves predicted by method closely align results. demonstrate not only strong properties but also significant resistance. Notably, highest strength, modulus, strength were achieved at small 12.8°, reaching values 184.66 MPa, 10.21 GPa 28.03 kJ/m 2 . bouligand designed withstand environments. significantly expands potential applications within realm Highlights Preparation Bouloigand‐like utilizing wood. Helix stacking affects performance WFRCs. Finite was employed predict “Green” exhibit exceptional Expanding application areas

Language: Английский

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An Overview of Recycling Phenolic Resin

Polymers, Journal Year: 2024, Volume and Issue: 16(9), P. 1255 - 1255

Published: April 30, 2024

Over a century ago, phenolic formaldehyde (PF) resin was developed and continues to increase in yield due its diverse applications. However, PF is thermosetting plastic lacking fluidity moldability, which are nondegradable natural environments, leading severe threats fossil resources as well global environmental crises. As result, recycling extremely important. In this review, we provide the recent advances of resin, includes mechanical recycling, chemical utilization carbon-based materials. The advantages disadvantages each strategy evaluated from green chemistry perspective. This article aims attract interest design, synthesizing, application offering useful suggestions.

Language: Английский

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