Catalyst-free dynamic transesterification towards a high-performance and fire-safe epoxy vitrimer and its carbon fiber composite

Chen, Jiahui; Liu, Bowen; Lu, Jiong; Lu, Peng; Tang, Ya-Ling; Chen, Li; Wang, Yu‐Zhong

doi:10.1039/d2gc01405j

Cited by 45 publications

(19 citation statements)

References 53 publications

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“…Recycles of the samples result in slight decreases in their mechanical properties. The tensile-strengthbased recycling efficiency 58 of the 3 recycles are 84%, 94%, and 70%, which are superior over the values reported in the literature. 58 Moreover, the solvent-resistance of the samples has been tested with using NMP as a solvent.…”

Section: Papermentioning

confidence: 55%

“…The tensile-strengthbased recycling efficiency 58 of the 3 recycles are 84%, 94%, and 70%, which are superior over the values reported in the literature. 58 Moreover, the solvent-resistance of the samples has been tested with using NMP as a solvent. From the data collected as shown in Table S2, † the thermally recycled samples show comparable gel fractions to those of CR-MADV, supporting the high solvent-resistance.…”

Section: Papermentioning

confidence: 55%

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Meldrum's acid mediated ketene chemistry in the formation of ester bonds for the synthesis of vitrimers with high glass transition temperatures

Hung

Liu

2023

Polym. Chem.

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Section: Papermentioning

confidence: 55%

Section: Papermentioning

confidence: 55%

Meldrum's acid mediated ketene chemistry in the formation of ester bonds for the synthesis of vitrimers with high glass transition temperatures

Hung

Liu

2023

Polym. Chem.

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“…Epoxy resins are widely applied in adhesives, coatings, electronic packaging materials, and composites due to their excellent mechanical properties, heat resistance, chemical resistance, and dimensional stability. − However, the covalent cross-linking structure hampers the recycling of epoxy-based products. , It is of great importance to develop technologies for recycling epoxy resins at the end of use. − …”

Section: Introductionmentioning

confidence: 99%

High-Performance Recyclable and Malleable Epoxy Resin with Vanillin-Based Hyperbranched Epoxy Resin Containing Dual Dynamic Bonds

Hao¹,

Zhong²,

Li³

et al. 2023

ACS Sustainable Chem. Eng.

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Dynamic covalent polymer networks represent new opportunities in the design of sustainable epoxy resins due to their excellent malleability and reprocessability; however, the adaptable network is usually accompanied by low glass transition temperature, poor creep resistance, and mechanical brittleness. Herein, we demonstrate a vanillin-based hyperbranched epoxy resin (VEHBP) containing disulfide and imine dynamic covalent bonds for recyclable and malleable epoxy resin with high glass transition temperature (T g ), significantly improved creep resistance, and mechanical properties. The dynamic covalent epoxy resin containing 5%VEHBP exhibited a high glass transition temperature of 175 °C and a creep temperature of 130 °C and a 34.1, 19.7, and 173.3% increase in tensile strength, storage modulus, and tensile toughness respectively, compared with the neat resin. Meanwhile, the hyperbranched topological structure of VEHBP complemented by dual dynamic bonds endowed these materials with excellent self-healing ability, reprocessability, and degradability, which represents an important step toward the design and fabrication of highperformance epoxy covalent adaptable networks.

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“…The analysis of the storage modulus, loss modulus, and tan δ values of TA/BA 0.7 /PVA 3.0 (Figures 3a and S4) revealed a storage modulus as high as 4000 MPa; this value is larger than that of several reported epoxy-type vitrimers. 22,38,39 The glass transition temperature (T g ) of the trimeric vitrimer was identified using differential scanning calorimetry (DSC). The inflection point of the DSC heating curve corresponds to T g (Figure S5).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Robust Biobased Vitrimers and Its Application to Closed-Loop Recyclable Carbon Fiber-Reinforced Composites

Hong,

Jeong

et al. 2023

ACS Sustainable Chem. Eng.

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Vitrimers are being actively studied as sustainable plastics. To that end, robust vitrimer films fabricated from a ternary aqueous solution of tannic acid (TA), boric acid (BA), and polyvinyl alcohol (PVA) are reported herein. The trimeric vitrimer films include B−O−C dynamic covalent bonds. The optimal vitrimer film exhibits excellent crosslinking density (0.0471 mol/ cm 3 ), tensile strength (77 MPa), and modulus (3.2 GPa). A carbon−fiber-reinforced vitrimer (CFRV) was prepared with a vitrimer film and carbon fiber at temperatures above T v . The CFRV (tensile strength, 570 MPa; modulus, 21 GPa) can be used as a structural composite material. Additionally, it retains the unique recyclability and reprocessability of the vitrimer. The solution-cast film can be reproduced from the vitrimer solution prepared during recycling, and a CFRV similar to the original can be recreated by remolding the recovered carbon fiber with the reproduced vitrimer film. The synthesized biobased high-strength vitrimer films can facilitate the development of sustainable carbon−fiber-composite materials.

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Catalyst-free dynamic transesterification towards a high-performance and fire-safe epoxy vitrimer and its carbon fiber composite

Abstract: The construction of fire-safe and high-performance carbon fiber reinforced composites with reprocessable matric resin and recyclable reinforced fiber is of great importance and particularly urgent to solve the current overreliance...

Cited by 45 publications

References 53 publications

Meldrum's acid mediated ketene chemistry in the formation of ester bonds for the synthesis of vitrimers with high glass transition temperatures

Meldrum's acid mediated ketene chemistry in the formation of ester bonds for the synthesis of vitrimers with high glass transition temperatures

High-Performance Recyclable and Malleable Epoxy Resin with Vanillin-Based Hyperbranched Epoxy Resin Containing Dual Dynamic Bonds

Robust Biobased Vitrimers and Its Application to Closed-Loop Recyclable Carbon Fiber-Reinforced Composites

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