Electrospun recycled PET-based mats: Tuning the properties by addition of cellulose and/or lignin |
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| Affiliation: | 1. Macromolecular Materials and Lignocellulosic Fibers Group, Center of Research on Science and Technology of BioResources, Institute of Chemistry of São Carlos, University of São Paulo, São Carlos, São Paulo, Brazil;2. Institute of Chemistry of São Carlos, University of São Paulo, São Carlos, São Paulo, Brazil;3. Department of Materials Engineering, Federal University of São Carlos, São Carlos, São Paulo, Brazil;1. Center for Advanced Materials, Qatar University, PO Box 2713, Doha, Qatar;2. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského nám. 2, 162 06 Praha, Czechia;1. Department of Mechanical Engineering, Faculty of Engineering of Bilbao, University of the Basque Country (UPV/EHU), Rafael Moreno “Pitxitxi” 2-3, 48013 Bilbao, Spain;2. Department of Mining, Metallurgy and Science of Materials, Faculty of Engineering of Bilbao, University of the Basque Country (UPV/EHU), Rafael Moreno “Pitxitxi” 2-3, 48013 Bilbao, Spain;3. Materials Testing and Simulation, Leartiker (Lea-Artibai Development Center), Xemein Avenue 12-A, 48270 Markina, Xemein, Spain;1. Enersol Pty Ltd, 235 Nelson St, Annandale, NSW, 2038, Australia;2. United Nations Population Fund, UN City, Marmorvej 51, 2100 Copenhagen, Denmark |
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| Abstract: | The aim of this study was to evaluate the influence of cellulose and/or lignin on the properties of mats prepared from dissolution (for 48 h or 72 h, solvent: trifluoroacetic acid) of recycled poly (ethylene terephthalate) (PET). Briefly, the presence of cellulose led to a tendency of higher average fiber diameter and average pore area as well as lower average porosity compared to the neat mat (PETref, 242 ± 59 nm, 9.6 ± 1.1 104 nm2 and 19.0 ± 1.1%, respectively). The Tg values for electrospun PET combined with cellulose and/or lignin were higher than that of PETref (92.5 ± 0.1 °C), and the tensile strength increased with the cellulose and/or lignin loading. In addition, the presence of lignin (72 h of dissolution) led to a mat with an elongation at break of 149 ± 9% compared to 14 ± 2% for PETref. The results indicated that the properties of mats based on PET can be tuned by adding cellulose and/or lignin to solutions posteriorly electrospun as well as by varying the dissolution time. |
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| Keywords: | Recycled PET Cellulose Lignin Electrospinning Ultrathin fibers/nanofibers |
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