Requirements for the Chemical Recycling of Fibre Reinforced Polymers

The increasing use of fiber reinforced polymers (FRP) in lightweight construction is presenting new fundamental challenges for the recycling industry. In Germany alone, approx. 225 kt of glass fibre reinforced plastic (GFRP) material was produced in 2019, compared to approx. 141 kt of carbon fibre r...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Elisa Seiler, Davide Pico, Ulrich Teipel
Formato:	article
Lenguaje:	EN
Publicado:	AIDIC Servizi S.r.l. 2021
Materias:	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895
Acceso en línea:	https://doaj.org/article/201c4123dbf749a6bdf50bc2f17ef4be
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:201c4123dbf749a6bdf50bc2f17ef4be
record_format	dspace
spelling	oai:doaj.org-article:201c4123dbf749a6bdf50bc2f17ef4be2021-11-15T21:46:48ZRequirements for the Chemical Recycling of Fibre Reinforced Polymers10.3303/CET21882232283-9216https://doaj.org/article/201c4123dbf749a6bdf50bc2f17ef4be2021-11-01T00:00:00Zhttps://www.cetjournal.it/index.php/cet/article/view/12016https://doaj.org/toc/2283-9216The increasing use of fiber reinforced polymers (FRP) in lightweight construction is presenting new fundamental challenges for the recycling industry. In Germany alone, approx. 225 kt of glass fibre reinforced plastic (GFRP) material was produced in 2019, compared to approx. 141 kt of carbon fibre reinforced plastic (CFRP) worldwide, which has to be recycled even after the end-of-life. Main focus is principally on epoxy resin and carbon fibers (used for example in wind power plants and in electro mobility). Apart from pyrolysis, which currently is the only industrially used process and is mainly applied to carbon fiber reinforced polymers, chemical processes are being researched for the recycling of reinforcing fibres and matrix. The ability to fully recover both fiber and matrix by using solvents at the same time is one of the main advantages of chemical solvent processes. The challenge in chemical recycling is the selectivity of the respective solvents when applied to the variety of material combinations as matrix or fiber reinforcement in composite materials. Aim of this research work is the investigation and definition of requirements for a fiber recovery from the epoxy matrix with subcritical and supercritical water. In the chemical recycling of GFRP and CFRP waste, the epoxy resin is converted into a liquid phase, while the fibers remain as a solid residue. Due to the chemical stability of epoxy resins, their chemical recycling by solvolysis requires high temperatures and high pressures; the process conditions can be defined as subcritical or supercritical depending on the physical state of the solvent during the process. Especially the use of supercritical fluids is considered promising for the recycling of FRP. Supercritical fluids have low viscosity, a high mass transfer behaviour and, most important, a high diffusion coefficient, which leads to a high solvability. The typically used solvents water or alcohols are considered to be environmentally friendly. The results of the research show that the amount of resin remaining decreases with increasing temperature and processing time, while temperature having the greater influence on resin removal.Elisa SeilerDavide PicoUlrich TeipelAIDIC Servizi S.r.l.articleChemical engineeringTP155-156Computer engineering. Computer hardwareTK7885-7895ENChemical Engineering Transactions, Vol 88 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895
spellingShingle	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895 Elisa Seiler Davide Pico Ulrich Teipel Requirements for the Chemical Recycling of Fibre Reinforced Polymers
description	The increasing use of fiber reinforced polymers (FRP) in lightweight construction is presenting new fundamental challenges for the recycling industry. In Germany alone, approx. 225 kt of glass fibre reinforced plastic (GFRP) material was produced in 2019, compared to approx. 141 kt of carbon fibre reinforced plastic (CFRP) worldwide, which has to be recycled even after the end-of-life. Main focus is principally on epoxy resin and carbon fibers (used for example in wind power plants and in electro mobility). Apart from pyrolysis, which currently is the only industrially used process and is mainly applied to carbon fiber reinforced polymers, chemical processes are being researched for the recycling of reinforcing fibres and matrix. The ability to fully recover both fiber and matrix by using solvents at the same time is one of the main advantages of chemical solvent processes. The challenge in chemical recycling is the selectivity of the respective solvents when applied to the variety of material combinations as matrix or fiber reinforcement in composite materials. Aim of this research work is the investigation and definition of requirements for a fiber recovery from the epoxy matrix with subcritical and supercritical water. In the chemical recycling of GFRP and CFRP waste, the epoxy resin is converted into a liquid phase, while the fibers remain as a solid residue. Due to the chemical stability of epoxy resins, their chemical recycling by solvolysis requires high temperatures and high pressures; the process conditions can be defined as subcritical or supercritical depending on the physical state of the solvent during the process. Especially the use of supercritical fluids is considered promising for the recycling of FRP. Supercritical fluids have low viscosity, a high mass transfer behaviour and, most important, a high diffusion coefficient, which leads to a high solvability. The typically used solvents water or alcohols are considered to be environmentally friendly. The results of the research show that the amount of resin remaining decreases with increasing temperature and processing time, while temperature having the greater influence on resin removal.
format	article
author	Elisa Seiler Davide Pico Ulrich Teipel
author_facet	Elisa Seiler Davide Pico Ulrich Teipel
author_sort	Elisa Seiler
title	Requirements for the Chemical Recycling of Fibre Reinforced Polymers
title_short	Requirements for the Chemical Recycling of Fibre Reinforced Polymers
title_full	Requirements for the Chemical Recycling of Fibre Reinforced Polymers
title_fullStr	Requirements for the Chemical Recycling of Fibre Reinforced Polymers
title_full_unstemmed	Requirements for the Chemical Recycling of Fibre Reinforced Polymers
title_sort	requirements for the chemical recycling of fibre reinforced polymers
publisher	AIDIC Servizi S.r.l.
publishDate	2021
url	https://doaj.org/article/201c4123dbf749a6bdf50bc2f17ef4be
work_keys_str_mv	AT elisaseiler requirementsforthechemicalrecyclingoffibrereinforcedpolymers AT davidepico requirementsforthechemicalrecyclingoffibrereinforcedpolymers AT ulrichteipel requirementsforthechemicalrecyclingoffibrereinforcedpolymers
_version_	1718426832868474880

Requirements for the Chemical Recycling of Fibre Reinforced Polymers

Ejemplares similares