Recycling process for carbon fiber reinforced plastics with polyamide 6, polyurethane and epoxy matrix by gentle solvent treatment
| Autor: | Jakob Wölling, Martin Schlummer, Andreas Mäurer, Fabian Knappich, Magdalena Klotz |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Polymers 020209 energy Polyurethanes Thermosetting polymer 02 engineering and technology 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Carbon Fiber Ultimate tensile strength 0202 electrical engineering electronic engineering information engineering Caprolactam Composite material Waste Management and Disposal Dissolution 0105 earth and related environmental sciences Polyurethane chemistry.chemical_classification Epoxy Resins Polymer Epoxy Solvent chemistry visual_art Polyamide visual_art.visual_art_medium Solvents Plastics |
| Zdroj: | Waste management (New York, N.Y.). 85 |
| ISSN: | 1879-2456 |
| Popis: | Due to the complex composition of carbon fiber reinforced plastics (CFRPs), a complete and useful recovery of such composite material is a real challenge. This paper presents studies on potential solvent-based recycling processes for three CFRP samples comprising polyamide 6 (PA6), polyurethane resin (PUR) and epoxy resin (EP) matrix. Different proprietary CreaSolv® Formulations were applied in laboratory scale and under thermodynamically subcritical conditions in order to dissolve the polymeric matrix and separate the inert carbon fibers. By variation of decisive process parameters, the influence of the temperature-time-load during solvent treatment and solvent recovery was observed carefully. A complete removal of the polymer matrix of all samples was achieved by means of multi-stage solvent extraction without reducing both the length and tensile strength of the recovered carbon fibers. The recovered PA6 matrix polymer revealed no significant decline of its initial average molecular weight. For the dissolved and extracted resin matrices, feedstock recycling was identified as suitable reprocessing. All of the solvent formulations tested were recycled successfully, keeping the initial dissolution properties and, thus, being applicable in a closed loop process design. |
| Databáze: | OpenAIRE |
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