Purpose
Carbon fibers have been widely used in composite materials, such as carbon fiber-reinforced polymer (CFRP). Therefore, a considerable amount of CFRP waste has been generated. Different recycling technologies have been proposed to treat the CFRP waste and recover carbon fibers for reuse in other applications. This study aims to perform a life cycle assessment (LCA) to evaluate the environmental impacts of recycling carbon fibers from CFRP waste by steam thermolysis, which is a recycling process developed in France.
Abstract The development of effective recycling methods for plastic wastes is critical in terms of resource security and environmental conservation. In this work, we focused on the gaseous pyrolysis products of plastic wastes as alternatives to natural gas (NG) and propane. The pyrolysis of polyethylene (PE), polypropylene (PP), polystyrene (PS), poly(vinyl chloride) (PVC), poly(ethylene terephthalate) (PET), and their mixtures was carried out under isothermal conditions at 500, 700, and 900 °C....
Abstract This paper aims to study the effects of surface treating methods, including electrolysis of anodic oxidation, sizing and heat treatment at 200 °C, on physical and chemical properties of T700 grade high-strength carbon fiber GQ4522. The fiber surface roughness, surface energy and chemical properties were analyzed for different treated carbon fibers, using atom force microscopy, contact angle, Fourier transformed infrared and X-ray photoelectron spectroscopy, respectively. The results sho...
Abstract A silicone peroxide, tris(tert-butyldioxy)-vinyl-silane (VTPS), was adopted for carbon fibers (CFs) surface modification to improve the mechanical properties of CFs reinforced polydimethylsiloxanes (PDMS) composites. FT-IR and XPS confirmed that the Si-CH=CH 2 groups, which could generate covalent bonds between CFs and PDMS, were chemically bonded to CFs surface. And the method gave no obvious damage to CFs as shown by SEM and tensile strength analysis. After VTPS modification, the inte...
Last. Jon McKechnie(University of Nottingham)H-Index: 19
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Recovering value from carbon fibre reinforced polymers waste can help to address the high cost and environmental burden of producing carbon fibres, but there is limited understanding of the cost and environmental implications of potential recycling technologies. The objective of this study is to assess the environmental and financial viability of mechanical recycling of carbon fibre composite waste. Life cycle costing and environmental assessment models are developed to quantify the financial an...
#1Anke Krutof(MUN: Memorial University of Newfoundland)H-Index: 1
#2Kelly Hawboldt(MUN: Memorial University of Newfoundland)H-Index: 23
Pyrolysis oil is a promising renewable fuel. However, crude pyrolysis oil use in conventional engines or boilers can be limited without modifications to these systems. Other bio-oils such as oils from vegetables or animal wastes face similar issues. One option to enhance the applicability of bio-oils is blending with petroleum or other bio-based fuels. A literature review on the blending of bio-oils to enhance their fuel properties is presented. Included in the review is information on types of ...
Last. Feng Xing(SZU: Shenzhen University)H-Index: 41
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Abstract In this research, we proposed an electrochemical method for the recycling of carbon fibers from carbon fiber reinforced polymer (CFRP). Experiments were designed with different solution concentrations (3%, 10%, and 20% NaCl) and various levels of applied current (4 mA, 10 mA, 20 mA, and 25 mA) so as to identify the significant parameters that affect carbon fiber recycling efficiency. The recycled carbon fibers were characterized by using the single fiber tensile strength test, SEM, XRD,...
Last. Gary A. Leeke(University of Birmingham)H-Index: 25
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Abstract A complete review of the different techniques that have been developed to recycle fibre reinforced polymers is presented. The review also focuses on the reuse of valuable products recovered by different techniques, in particular the way that fibres have been reincorporated into new materials or applications and the main technological issues encountered. Recycled glass fibres can replace small amounts of virgin fibres in products but not at high enough concentrations to make their recycl...
The oil obtained by pyrolysis of waste plastics can be used as an alternate fuel for diesel engine without making any modification to the engine. The WPPO (waste plastic pyrolysis oil) mixed with 5% and 10% DEE (diethyl ether) were used as fuels for single cylinder water cooled, DI engine and its performance, emission and combustion characteristics were found. The experimental results indicated the reduction in smoke levels with that of baseline waste plastic pyrolysis oil. The BTE (brake therma...
In this article, Alpha Recyclage Composites presents a new steam thermolysis process to treat carbon fibre composites for recycling. The thermochemical process is used to recover the carbon fibres, which are then recycled into new thermoplastic composites. These second-generation materials possess mechanical properties that are comparable to those of materials made using virgin carbon fibres
The rising usage of carbon and glass fibers has raised awareness of scrap management options. Every year, tons of composite scrap containing precious carbon and glass fibers accumulate from numerous sectors. It is necessary to recycle them efficiently, without harming the environment. Pyrolysis seems to be a realistic and promising approach, not only for efficient recovery, but also for high-quality fiber production. In this paper, the essential characteristics of the pyrolysis process, their in...
#1Weihao Liu(Hefei University of Technology)H-Index: 2
#2Haihong Huang(Hefei University of Technology)H-Index: 15
Last. Zhifeng Liu(Hefei University of Technology)H-Index: 16
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Abstract There is a large amount of carbon fiber reinforced polymer (CFRP) waste generated annually, mainly due to the difficulty in recycling CFRPs. This work presents a novel additive manufacturing-based recycling approach that can be used to reclaim CFRP waste and to re-manufacture the carbon fiber into 3D printed composite parts. A trial of this idea was set up, in which carbon fiber was first reclaimed from CFRP waste using supercritical fluid and then mixed with Poly-Ether-Ether-Ketone to ...
#1Weihao Liu(Hefei University of Technology)H-Index: 2
#2Haihong Huang(Hefei University of Technology)H-Index: 15
Last. Zhifeng Liu(Hefei University of Technology)H-Index: 16
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Recycling carbon fiber reinforced polymer (CFRP) waste is unavoidable for the sustainable manufacturing and cost reduction of CFRP products. Supercritical fluid technology is an emerging chemical method for recycling CFRP waste, but its energy intensity and environmental implication are limited understanding. In this paper, the energy intensity and environmental impact of supercritical fluid technology were quantitatively assessed in CFRP recycling process. Then, the life cycle assessment (LCA) ...
Abstract Carbon fibre reinforced polymers (CFRPs), with a demand expected to reach 194 ktons by 2022 and a global market increase to $48.7 billion, are increasingly popular materials due to their ability to conjugate superior mechanical resistance and lightness, thus allowing their widespread ranging from aerospace and wind turbines to automotive and sporting goods. A foreseeable consequence is the growth of production scraps and end–of–life (Eol) composites. Considering the still high cost of t...
Abstract A comparative life cycle assessment analysis among pressure bag molding and bag molding with autoclave for the manufacturing of car components in carbon fiber reinforced plastic (CFRP) was carried out. Four scenarios were analysed: i) autoclave bag molding with aluminum mold, ii) autoclave bag molding with CFRP mold and plastic master, iii) autoclave bag molding with CFRP mold and medium density fiberboard master, and iv) pressure bag molding with aluminum mold. The collected data for l...
Last. Masahiko Hirao(UTokyo: University of Tokyo)H-Index: 27
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Abstract Polymer and polymer composites can improve the fuel economy of vehicles by lightweighting and providing design flexibility. While the automobile's polymer content is increasing over the years, the environmental impact assessment of polymer contribution is limited to non-structural parts replacement and scenario analysis on a hypothetical automobile. This paper presents a life cycle greenhouse gas (GHG) emissions of an actual electric vehicle made of 47% polymers and polymer composites t...
Last. Ian Hamerton(UoB: University of Bristol)H-Index: 33
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Abstract Life cycle assessment (LCA) is a valuable tool for establishing the environmental burdens of a composite material over its lifetime. It is therefore of importance to the composites industry as a material selection tool when determining the applicability of recycled composites in the component design phase. This review paper evaluates the LCA framework and its ability to accurately determine the benefits of closed-loop composite recycling, with the aim of aiding future material selection...
