Enhancing toughness, healing and reprocessability of sustainable epoxy vitrimer composites by PEG-assisted regenerated cellulose

Huang, Bowen; He, Hui; Dufresne, Alain; He, Xuefeng; Wang, Shuzhan

doi:10.1016/j.indcrop.2021.113804

Cited by 19 publications

(7 citation statements)

References 37 publications

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“…This is well reported in the literature for several micro and nanofillers above a certain weight fraction threshold. 32,33 From the results herein discussed so far, it is clear that the high concentration of MCC had a marked effect on the crosslinking of epoxy resins.…”

Section: Moisture Uptake and Gel Contentmentioning

confidence: 87%

Impact of water absorption on the creep performance of epoxy/microcrystalline cellulose composites

Lavoratti,

Bianchi,

Cruz

et al. 2024

J of Applied Polymer Sci

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Recently, considerable effort has been made to study cellulose/epoxy composites. However, there is a gap when it comes to understanding the post‐conditioning anomalous effect of moisture uptake on their mechanical and dynamic‐mechanical properties, and on their creep behavior. In this work, up to 10.0 wt% microcrystalline cellulose (MCC) was incorporated into epoxy resin by simple mixing and sonication. Epoxy/MCC composites were fabricated by casting in rubber silicone molds, and rectangular and dog‐bone test specimens were produced. The moisture uptake, dynamic mechanical, chemical, tensile, and creep behavior were evaluated. The incorporation of MCC increased the water diffusion coefficient. The changes in storage modulus and glass transition temperature, combined with Fourier‐transform infrared spectroscopy analysis, evidenced that water sorption in epoxies causes both plasticization and additional resin crosslinking, although the latter is prevented by the addition of MCC. The creep strain of the composites increased by 60% after conditioning, indicating that plasticization induced by water sorption plays an important role in the long‐term properties of the composites.

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Section: Moisture Uptake and Gel Contentmentioning

confidence: 87%

Impact of water absorption on the creep performance of epoxy/microcrystalline cellulose composites

Lavoratti,

Bianchi,

Cruz

et al. 2024

J of Applied Polymer Sci

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“…81 Regenerated cellulose (RC) was also reported as a reinforcement to improve the mechanical properties of the vitrimer composites (tensile, flexural and impact strengths, scratch healing and reprocessability). 82 Cellulose paper was used in combination with vitrimers introducing a series of properties such as shape-memory, reshaping, self-healing, and reprocessing. 83…”

Section: Cellulose-based Reinforcementsmentioning

confidence: 99%

Vitrimer composites: current status and future challenges

et al. 2022

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“…Thermosetting resins have been widely used in many fields, such as aerospace, electronics, adhesives, etc., because of their excellent mechanical properties, thermal stability, and chemical stability. [1][2][3][4] However, the permanent cross-linked three-dimensional network structure makes it challenging to reprocess and recycle. 5 To solve this problem, researchers introduced dynamic covalent bonds into the permanent cross-linked system of thermosetting polymers and developed cross-linked polymers containing dynamic covalent bonds: covalent adaptive networks (CANs).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polyurethane toughened covalent adaptive networks epoxy composite based on thermoreversible Diels‐Alder reaction: Self‐healable, shape memory, and recyclable

Li,

Zhang,

Song

et al. 2023

J of Applied Polymer Sci

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Covalent adaptive networks (CANs) epoxy based on the Diels‐Alder (DA) reaction usually are commonly used for self‐healing materials. However, poor toughness greatly limits its application in innovative materials. Herein, based on retaining the excellent dynamic characteristics of DA reactive CANs, we introduced thermoplastic polyurethane (TPU) in situ during crosslinking, improving the composite material's strength and toughness. A multicomponent polymeric system with advanced performance can be produced by the individual components on the condition of the synergistic hybrid effects. Molecular‐level interlocking polymer networks between the chain entanglement of TPU and the reversible covalent crosslink of DFB were formed by the topological reorganization of these two immiscible polymers. As the gelation proceeds, a homogenous structure instead of conventional phase separation is formed. When the mixing ratio of DFB and TPU is 1:1, the tensile strength of the prepared sample reaches 35 MPa, and the elongation at break reaches 110%. At the same time, the composites possess good thermal stability and solvent resistance due to the presence of interlocking polymer networks. Furthermore, these DFB‐TPU composites show excellent shape memory, self‐healing, and closed‐loop recycling properties.

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Enhancing toughness, healing and reprocessability of sustainable epoxy vitrimer composites by PEG-assisted regenerated cellulose

Cited by 19 publications

References 37 publications

Impact of water absorption on the creep performance of epoxy/microcrystalline cellulose composites

Impact of water absorption on the creep performance of epoxy/microcrystalline cellulose composites

Vitrimer composites: current status and future challenges

Polyurethane toughened covalent adaptive networks epoxy composite based on thermoreversible Diels‐Alder reaction: Self‐healable, shape memory, and recyclable

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