Room-temperature fully recyclable carbon fibre reinforced phenolic composites through dynamic covalent boronic ester bonds

Wang, Shujuan; Xing, Xiaolong; Zhang, Xiaoting; Wang, Xiao; Jing, Xinli

doi:10.1039/c8ta01801d

Cited by 136 publications

(83 citation statements)

References 51 publications

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“…While most previous works on vitrimer composites are focused on their capability of recycling and self-healing [ 54 , 55 , 56 , 57 ], rapid reshaping to fix a new permanent/temporary shape (including to reshape the distribution of inclusions) is of great potential in many engineering applications.…”

Section: Applications Of Vitrimer-like Smps and Their Compositesmentioning

confidence: 99%

Vitrimer-Like Shape Memory Polymers: Characterization and Applications in Reshaping and Manufacturing

et al. 2020

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The shape memory effect (SME) refers to the ability of a material to recover its original shape, but only in the presence of a right stimulus. Most polymers, either thermo-plastic or thermoset, can have the SME, although the actual shape memory performance varies according to the exact material and how the material is processed. Vitrimer, which is between thermoset and thermo-plastic, is featured by the reversible cross-linking. Vitrimer-like shape memory polymers (SMPs) combine the vitrimer-like behavior (associated with dissociative covalent adaptable networks) and SME, and can be utilized to achieve many novel functions that are difficult to be realized by conventional polymers. In the first part of this paper, a commercial polymer is used to demonstrate how to characterize the vitrimer-like behavior based on the heating-responsive SME. In the second part, a series of cases are presented to reveal the potential applications of vitrimer-like SMPs and their composites. It is concluded that the vitrimer-like feature not only enables many new ways in reshaping polymers, but also can bring forward new approaches in manufacturing, such as, rapid 3D printing in solid state on space/air/sea missions.

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Section: Applications Of Vitrimer-like Smps and Their Compositesmentioning

confidence: 99%

Vitrimer-Like Shape Memory Polymers: Characterization and Applications in Reshaping and Manufacturing

et al. 2020

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“…Jing et al introduced PBA as a cross-linking agent in novolac resin, which was used to produce a carbon fiberreinforced polymer composite. 51 Charged boronate esters are relatively stable when bound in aqueous solutions, particularly in alkaline aqueous solutions. Thus, charged boronate ester bonds have been extensively applied for self-healing in hydrogels, which mainly employ water as a solvent.…”

Section: Boronic Acid and Reversible Estersmentioning

confidence: 99%

“…Jing et al reported a study on the efficient recycling of carbon fiber-reinforced polymer (CFRP), which is widely used in largescale industrial applications. 51 By applying PBA to the novolac resin (NR) raw materials used in various fields, crosslinks by dynamic reversible boronate linkages were introduced (Fig. 8a).…”

Section: Potential Industrial Applications Merited By Mechanical Robustness and Reprocessabilitymentioning

confidence: 99%

Recent progress in self-healing polymers and hydrogels based on reversible dynamic B–O bonds: boronic/boronate esters, borax, and benzoxaborole

et al. 2021

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“…Carbon fibre reinforced plastic (CFRP) composite has been widely used in automotive industries, wind energy industries and other engineering applications due to its unique combination of low-weight, high elasticity and strength and good corrosion resistance [ 1 , 2 , 3 ]. The excellent mechanical properties of carbon fibre reinforced thermoset composites and their increasing affordability means that industrial demand continues to grow rapidly [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Recovery of Carbon Fibre from Waste Prepreg via Microwave Pyrolysis

Hao

Liu

et al. 2021

Polymers

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Management of waste from carbon fibre composites has become a significant societal issue as the application of composite grows across many industries. In this study, carbon fibres (CF) were successfully recovered from cured carbon fibre/epoxy (CF/EP) prepreg under microwave pyrolysis at 450, 550 and 650 °C followed by oxidation of any residual char. The recovered fibres were investigated for their tensile properties, surface morphologies and the elements/functional groups presented on the surface. The chemical compositions of gaseous and oil pyrolysis products were also analysed. The microwave pyrolysis effectively pyrolyzed the epoxy (EP) resin. Char residue remained on the fibre surface and the amount of char reduced as the pyrolysis temperature increased. Compared to virgin fibres, the recovered fibre suffered from a strength reduction by less than 20%, and this reduction could be mitigated by reducing the pyrolysis temperature. The surface of recovered fibre remained clean and smooth, while the profile of elements and functional groups at the surface were similar to those of virgin fibres. The main gaseous products were CO, H2, CO2 and CH4, whilst the liquid product stream included phenolic and aromatic compounds.

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Room-temperature fully recyclable carbon fibre reinforced phenolic composites through dynamic covalent boronic ester bonds

Abstract: By utilizing the alcoholysis nature of boronate bonds, the CF/PBNR composites can be fully recycled at room temperature in ethanol solvent without sacrificing the mechanical properties.

Cited by 136 publications

References 51 publications

Vitrimer-Like Shape Memory Polymers: Characterization and Applications in Reshaping and Manufacturing

Vitrimer-Like Shape Memory Polymers: Characterization and Applications in Reshaping and Manufacturing

Recent progress in self-healing polymers and hydrogels based on reversible dynamic B–O bonds: boronic/boronate esters, borax, and benzoxaborole

Recovery of Carbon Fibre from Waste Prepreg via Microwave Pyrolysis

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