The influence of oxygen containing functional groups on carbon fibers for mechanical properties and recyclability of CFRTPs made with in-situ polymerizable polyamide 6

Irisawa, Toshihira; Inagaki, Ryohei; Iida, Junya; Iwamura, Ryosuke; Ujihara, Kento; Kobayashi, Sarasa; Tanabe, Yasuhiro

doi:10.1016/j.compositesa.2018.05.035

Cited by 28 publications

(7 citation statements)

References 36 publications

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“…decomposition of the sizing agent, so they do not lose weight appreciably in such heating process [20,21]. The carbonization reactions explain the fact that the weight loss at 1000 °C (29.4 wt.%) is lower than the amount of resin present in the CFRP (from Table 1, amount of resin = 100 − 61.0 = 39.0 wt.%).…”

Section: Cfrp Waste Cfmentioning

confidence: 97%

“…Such authors attributed the steady weight loss of the sample to volatilization of carbonaceous products formed due to carbonization reactions that occur during polymer decomposition. Carbon fibers are highly stable in a nitrogen atmosphere up to 1000 • C and only undergo a small weight loss (≈1 wt.%) between 300 • C and 400 • C due to the decomposition of the sizing agent, so they do not lose weight appreciably in such heating process [20,21].…”

Section: Cfrp Waste Cfmentioning

confidence: 99%

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Thermo-Catalytic Treatment of Vapors in the Recycling Process of Carbon Fiber-Poly (Benzoxazine) Composite Waste by Pyrolysis

Gastelu

López-Urionabarrenechea

Solar

et al. 2018

Catalysts

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Recycling carbon fiber from residual carbon fiber reinforced plastics (CFRP) is one of the key aspects of the future in the field of waste management. This work presents the possibility of recovering chemical compounds through the thermo-catalytic treatment of the gases and vapors produced from the decomposition of the polymeric resin that takes place in the recycling of CFRP by pyrolysis. A lab-scale installation consisting of two reactors placed in series has been used for the experiments. In the first reactor, pyrolysis of poly(benzoxazine)-based composite waste has been carried out at 500 °C. In the second reactor, the thermo-catalytic treatment of gases and vapors has been performed at 900 °C in the presence of a commercial and a lab-prepared reforming catalyst. The thermal treatment of gases and vapors leads to a significant reduction in the collected liquids and a H2-rich gas fraction. When reforming catalysts are used, the organic fraction of the liquids is virtually eliminated and gas fractions containing more than 50% H2 in volume are generated. The results obtained show that it is possible to valorize the material content of the polymer resin, which represents an important advance in the recycling of CFRP by pyrolysis.

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Section: Cfrp Waste Cfmentioning

confidence: 97%

Section: Cfrp Waste Cfmentioning

confidence: 99%

Thermo-Catalytic Treatment of Vapors in the Recycling Process of Carbon Fiber-Poly (Benzoxazine) Composite Waste by Pyrolysis

Gastelu

López-Urionabarrenechea

Solar

et al. 2018

Catalysts

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“…An in-situ polymerization method was developed recently, whereby the reinforcing fibers are impregnated by monomer with low viscosity, which is a chemical substance before it becomes a thermoplastic polymer. FRTP can obtained when polymerization reaction occurs in situ [ 27 , 28 , 29 , 30 ]. Most methods mentioned above focused on fiber bundle level, and difficult to achieve without an especial equipment.…”

Section: Introductionmentioning

confidence: 99%

A Facile Molding Method of Continuous Fiber-Reinforced Thermoplastic Composites and Its Mechanical Property

et al. 2022

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The mechanical properties of continuous fiber-reinforced thermoplastic (C-FRTP) composites are commonly lower than those of continuous fiber-reinforced thermosetting plastic (C-FRP) composites. We have developed a new molding method for C-FRTP. In this study, pre-impregnated materials were successfully prepared by polymer solution impregnation method and, finally, C-FRTP was fabricated. The viscosity of the thermoplastic matrix was decreased to approximately 3dPa×s, the same level of epoxy, and the fiber volume fraction was increased from approximately 45 to 60%. The cross-section of specimens were polished by an ion milling system and impregnation condition was investigated by scanning electron microscopy (SEM). The micrographs suggested that thermoplastic polymer was impregnated to every corner of the fiber, and no void was found on the cross-section. It revealed that void-free composites with perfect mechanical properties can be manufactured with this new molding method. All specimens were submitted to a mechanical measuring equipment, and the mechanical properties of the composite specimens were investigated. Mechanical analysis revealed that tensile property and flexural property of C-FRTP were enhanced up to the same level with C-FRP.

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“…On the other hand, it has remarkable heterogeneous nucleation for PA6 matrix when it attach molecular chain, which could effect the crystal structure and mechnical properties of PA6. Last but not least, it is crucial that nano-SiO 2 has a high thermal decomposition temperature reach 1723℃ [11], this character make it can be completely suitable for processing extrusion and injection moulding of PA6, because the fusion temperature of PA6 is 220℃ [12]. However, nano-SiO 2 won't graft to the CF surface effectively without any intermediate because of the less existence of polar groups on the CF surface.…”

Section: Introductionmentioning

confidence: 99%

Construction of double grafted interfacial layer to improve thermal and mechanical properties of short carbon fiber reinforced polyamide 6 composites

Gao

Peng

et al. 2022

Preprint

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A double grafted interfacial layer on CF surface was constructed via PDA and nano-SiO2 (CF-PDA-SiO2) by a facile and effective method to reinforce polyamide 6 composites (CFs/PA6). The effects of double grafted interfacial layer on crystallization structure and behavior, thermal properties, and mechanical properties of CFs/PA6 composites were investigated. This interfacial layer greatly increased the number of active groups, roughness and wettability of CF surface, the tensile strength of CF-PDA-SiO2/PA6 composites increased by 28.09%, 19.37%, and 26.22% compared to untreated-CF/PA6, CF-PDA/PA6, and CF-SiO2/PA6 composites, respectively, which might be caused by the increased interfacial adhesion between CF and PA6 matrix. The thermal stability, crystallization temperature, crystallinity, as well as glass transition temperature (Tg) of CF-PDA-SiO2/PA6 composites improved correspondingly, attributing to the heterogeneous nucleation of nano-SiO2 in the crystalline area and hydrogen bonds with molecular chains of PA6 in the amorphous area. Furthermore, interfacial reinforcement mechanism of composites have been discussed.

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The influence of oxygen containing functional groups on carbon fibers for mechanical properties and recyclability of CFRTPs made with in-situ polymerizable polyamide 6

Cited by 28 publications

References 36 publications

Thermo-Catalytic Treatment of Vapors in the Recycling Process of Carbon Fiber-Poly (Benzoxazine) Composite Waste by Pyrolysis

Thermo-Catalytic Treatment of Vapors in the Recycling Process of Carbon Fiber-Poly (Benzoxazine) Composite Waste by Pyrolysis

A Facile Molding Method of Continuous Fiber-Reinforced Thermoplastic Composites and Its Mechanical Property

Construction of double grafted interfacial layer to improve thermal and mechanical properties of short carbon fiber reinforced polyamide 6 composites

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