Novel approach to recycled carbon fiber suitability assessment for additive technologies

Лебедева, Е. А.; Астафьева, С. А.; Istomina, T. S.; Trukhinov, D. K.; Shamsutdinov, A.Sh.; Strel'nikov, V.N.; Kukharenko, A.I.; Zhidkov, I.S.

doi:10.1016/j.apsusc.2022.154251

Cited by 13 publications

(4 citation statements)

References 33 publications

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“…The slower degradation kinetics of the cross-linked polymers compared to linear polymers can be attributed to the inefficient UV absorption by the UV-absorbing CFs. XPS measurements were conducted to study the surface properties of the recovered CFs and the pristine CFs (Figure b). − The peak patterns and chemical bond percentages of the recovered CFs closely resembled those of the pristine CFs, indicating the successful recovery of the CFs without significant structural changes. Furthermore, SEM analysis was conducted to examine the microstructures of pristine CFs, CFRP composites, and recycled CFs (Figure c).…”

Section: Resultsmentioning

confidence: 95%

On-Demand Degradable and Acid-Generating Polymers Using Phenacyl Ester Derivatives

Yeon,

Kumar,

Song

et al. 2024

Macromolecules

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UV-triggered degradation is an efficient method for disposing of polymers that are no longer usable or needed. Although various photolabile molecules have been employed to design photodegradable polymers, the potential of phenacyl ester derivatives, which liberate acidic molecules upon UV exposure, remains largely unexplored in polymer materials. Our study presents the UV-triggered degradation of polymers by utilizing phenacyl ester derivatives as monomers and cross-linkers. Through computational simulations and experiments, we investigate the regioisomeric and substitution effects of these derivatives on UV degradation kinetics. Notably, when incorporating these derivatives as repeating units in linear polymers, we observe accelerated UV degradation kinetics compared with small molecules. Throughout the degradation process, the photogenerated acids effectively initiate the deprotection of acetal protecting groups and the depolymerization of acid-sensitive polymers. Furthermore, we develop UV-degradable thermosetting resins based on phenacyl ester cross-linkers, serving as matrix materials for carbon fiber-reinforced polymer (CFRP) composites. By utilization of the UV-triggered degradation of the resin, CFs can be efficiently retrieved and recycled, offering a sustainable solution for CF recycling. This study opens a new avenue for designing waste-free plastics that can trigger specific chemical reactions upon degradation, contributing to a more environmentally friendly disposal of polymer waste.

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Section: Resultsmentioning

confidence: 95%

On-Demand Degradable and Acid-Generating Polymers Using Phenacyl Ester Derivatives

Yeon,

Kumar,

Song

et al. 2024

Macromolecules

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“…[43][44][45][46] As shown in Figure 4a, the occurrence of hydrophilic functional groups of the LO-CFs, such as hydroxyl groups (─OH) (3570-3200 cm −1 ) and carboxyl groups ─C = O) (1700-1520 cm −1 ), shows the enhanced absorption capability, indicating that the LO-CFs have better hydrophilicity than the pristine CFs. [47,48] To further investigate the chemical composition differences between the CFs and LO-CFs, XPS spectra for them were also recorded (Figure 4b). The intensity of the O1s peak of LO-CFs is significantly stronger than that of the CFs.…”

Section: Resultsmentioning

confidence: 99%

Biomimetic Structural Design of Fabric for Low‐Cost, Scalable, and Highly Efficient Off‐Grid Solar‐Driven Water Purification

Tian,

Song,

et al. 2024

Adv Funct Materials

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Interfacial solar‐vapor generation (ISVG) is an emerging technology for water purification. However, high cost, low evaporation rate, clogging issues, and limited solar utilization under natural condictions greatly hinder its practical application. Herein, inspired by the aligned microstructure of dragonfly wings, a 3D microarray structure composed of vertically aligned hierarchical and hydrophilic carbon fibers (CFs) is constructed using a scalable fiber manufacturing technology. The microarray structure of the high‐thermal‐conductivity CFs with nanocapillaries contributes to the fast mass (steam and salt ions) and heat transfer as well as high omnidirectional light absorption. More importantly, due to the strong multiscale capillary effect, the formed 3D water evaporation surface containing abundant micro‐meniscuses and nanoscale thin water layers in the CFs arrays effectively reduces the evaporation enthalpy and creates more water/air interfaces, leading to the significant increasing evaporation rate. As a result, a high evaporation rate of 2.21 kg m−2 h−1 under one‐sun irradiation can be achieved. Moreover, the off‐grid water treatment device assembled with multiple 3D CFs‐based customized spherical evaporators can obtain a high pure water collection of 10.71 kg m−2 per day without salt accumulation under real environmental conditions. This work demonstrates a high‐efficiency, cost‐effective, and scalable strategy for high‐performance ISVG.

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“…The spectra before and after regeneration exhibited three primary peaks, specifically C 1s at 285 eV, O 1s at 532 eV, and N 1s at 399 eV. The carbon fiber's surface before and after recovery is primarily composed of inert carbon atoms [26]. After the recovery process, there was a minor modification in the functional groups present on the surface of the carbon fiber.…”

Section: Properties Of Recovered Carbon Fibermentioning

confidence: 99%

“…The tensile test results demonstrated that the elastic modulus of the composite dropped from an average of 11.32 GPa before the recovery process to an average of 8.58 GPa after the recovery process. The tensile strength of the recovered carbon fiber-reinforced resin matrix composites also decreased from 320.67 MPa to 268.06 MPa, leading to a decline in the tensile mechanical properties [26]. The carbon fiber-reinforced composite underwent a bending test.…”

Section: Mechanical Properties Of Composite Platesmentioning

confidence: 99%

Research on Microwave Pyrolysis Recovery and Reuse Performance of Carbon Fiber Composites

Li,

Xu,

Ren

et al. 2024

Polymers

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Carbon fiber-reinforced resin matrix composites find extensive applications across various industries. However, their widespread use also generates significant waste, leading to resource depletion and environmental concerns. Studying the production of composite materials using recovered carbon fiber is imperative to mitigate the environmental impact associated with waste from carbon fiber-reinforced resin matrix composites and optimize resource utilization. In this study, carbon fiber was reclaimed using the microwave pyrolysis–oxidation process. The reclaimed carbon fiber underwent a cutting process to produce shorter carbon fibers tailored to specific requirements, which were then used to fabricate composite plates reinforced with epoxy resin. The mechanical characteristics of the composite were analyzed, along with SEM, XPS, infrared, Raman, and contact angle analyses conducted on the recovered carbon fiber. The test findings suggested minimal variation in the surface morphology of the recovered carbon fiber materials. Post-recovery, an increase in the quantity of oxygen-containing functional groups was observed on the carbon fiber surface. Additionally, the contact angle between the carbon fiber surface and the epoxy adhesive decreased. The mechanical properties of the composite produced from the recovered carbon fiber decreased, including the impact strength, tensile strength, and bending strength, with the impact strength dropping by 24.14%, tensile strength by 15.94%, and bending strength by 8.24%, while maintaining overall reusability, thus paving the way for the comprehensive utilization of carbon fiber resources.

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Novel approach to recycled carbon fiber suitability assessment for additive technologies

Cited by 13 publications

References 33 publications

On-Demand Degradable and Acid-Generating Polymers Using Phenacyl Ester Derivatives

On-Demand Degradable and Acid-Generating Polymers Using Phenacyl Ester Derivatives

Biomimetic Structural Design of Fabric for Low‐Cost, Scalable, and Highly Efficient Off‐Grid Solar‐Driven Water Purification

Research on Microwave Pyrolysis Recovery and Reuse Performance of Carbon Fiber Composites

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