Chemical recycling of carbon fibre reinforced composites in nearcritical and supercritical water

Piñero-Hernanz, Raúl; Dodds, Chris; Hyde, Jason R.; García-Serna, Juan; Poliakoff, Martyn; Lester, Edward; Cocero, Marı́a José; Kingman, S.W.; Pickering, Simon; Wong, Kok Hoong

doi:10.1016/j.compositesa.2008.01.001

Cited by 277 publications

(151 citation statements)

References 18 publications

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“…The values of 0.5 for the two samples (Table 2) do not vary significantly, which confirms that the treatment of the composite by phenol did not degrade the fibers. Similar results were reported by Piñero-Hernanz et al [19] during the chemical recycling of carbon fibers-reinforced composites in near-critical and supercritical water. …”

Section: Iii1 Characterization Of Recovered Carbon Fiberssupporting

confidence: 80%

Chemical recycling of carbon fibers-reinforced phenolic resin composites by phenol in subcritical conditions

Oumam¹,

Abourriche²,

Birot³

et al. 2014

IOSRJAC

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Abstract:In this work, a composite prepared with a phenolic matrix and reinforced with carbon fibers was subjected to degradation by phenol under subcritical conditions. Phenol was able to solubilize the resin matrix under relatively mild conditions (T ≤ 390 °C, P < 0.5 MPa) without altering the carbon fibers, as confirmed by scanning electron microscopy and by mechanical characterization of the fibers recovered after heat treatment.

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Section: Iii1 Characterization Of Recovered Carbon Fiberssupporting

confidence: 80%

Chemical recycling of carbon fibers-reinforced phenolic resin composites by phenol in subcritical conditions

Oumam¹,

Abourriche²,

Birot³

et al. 2014

IOSRJAC

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show abstract

“…In the presence of nucleophile, the weakness is situated on the peptide bond which is hydrolyzed from 280 °C and also on the alkyl-amid bonds which undergo homolytic scission at temperature greater than 500 °C [40]. As reported in the literature [11] the depolymerization of PA6 into ε-caprolactam could produce an intermediate which is the 6-aminocaproic acid as presented in the Fig. 8.…”

Section: Suggested Reaction Schemesmentioning

confidence: 72%

“…Recently, Morin et al [10] reviewed these methods for the recycling of carbon fibers reinforced polymers and concluded that chemical recycling is a favourable process to recover carbon fibers with good surface and mechanical properties. For this purpose, solvolysis of carbon fibers reinforced composites has been extensively investigated using batch or semi-continuous reactors in near-or supercritical conditions of water [11][12][13], in supercritical alcohols [14,15] or in mixtures [15]. Since the recycling depends strongly on mechanical properties, it is important to evaluate the tensile strength of recovered carbon fibers.…”

Section: Introductionmentioning

confidence: 99%

Impact of Solvolysis Process on Both Depolymerization Kinetics of Nylon 6 and Recycling Carbon Fibers from Waste Composite

Chaabani

Weiss-Hortala

Soudais

2017

Waste Biomass Valor

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“…In recent years, sub-and supercritical water (sub/SCW) is used as an environment-friendly method to decompose hazardous matters due to its extraordinary properties, such as low viscosities, high mass transport coefficient, high diffusivity and high solubility for organics [17,18]. In sub/SCW conditions, water can act not only as a solvent but also as a reactant, catalyst or product due to the different properties in different temperature and pressure [19].…”

Section: Introductionmentioning

confidence: 99%

Co-treatment of waste printed circuit boards and polyvinyl chloride by subcritical water oxidation: Removal of brominated flame retardants and recovery of Cu and Pb

Xiu

Zhang

2014

Chemical Engineering Journal

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h i g h l i g h t sWe report an effective process for co-treatment of waste PCBs and PVC. Brominated flame retardants can be decomposed efficiently in co-treatment. Dechlorination of PVC was complete and safe. Cu and Pb in waste printed circuit boards can be recovered efficiently. Sn and Cr can be immobilized efficiently in the residue after co-treatment. t r a c tIn this work, an effective process for removal of brominated flame retardants (BFRs) and recovery of Cu and Pb from waste printed circuit boards (PCBs) was developed. In the process, waste PCBs and polyvinyl chloride (PVC) were co-treated by subcritical water oxidation (SBWO). PVC was used as a hydrochloric acid source and waste PCBs was used as a neutralizing reagent for the produced HCl. The dechlorination of PVC, removal of BFRs, and recovery of Cu and Pb could be achieved simultaneously by the one-step SBWO reaction. Experimental results showed that the dechlorination of PVC was complete when SBWO temperature exceeded 250°C. SBWO co-treatment was high efficient for the leaching of Cu and Pb from waste PCBs, and XRD spectra indicated that Sn was immobilized as SnO 2 in the residue after co-treatment. The optimum SBWO co-treatment conditions were temperature of 350°C, time of 60 min, solidliquid ratio of 1:9 g/ml, and PVC-to-PCBs ratio of 1:1, respectively. In the optimized co-treatment, 98.9% of Cu and 80% of Pb were recovered, while the leaching efficiencies of Sn and Cr were 15.3% and 3.9%, respectively. Meanwhile, approximately 100% of the bromine was changed into HBr and enriched in water after co-treatment.

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Chemical recycling of carbon fibre reinforced composites in nearcritical and supercritical water

Cited by 277 publications

References 18 publications

Chemical recycling of carbon fibers-reinforced phenolic resin composites by phenol in subcritical conditions

Chemical recycling of carbon fibers-reinforced phenolic resin composites by phenol in subcritical conditions

Impact of Solvolysis Process on Both Depolymerization Kinetics of Nylon 6 and Recycling Carbon Fibers from Waste Composite

Co-treatment of waste printed circuit boards and polyvinyl chloride by subcritical water oxidation: Removal of brominated flame retardants and recovery of Cu and Pb

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