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    Electrospun recycled PET-based mats: Tuning the properties by addition of cellulose and/or lignin

    Year: 2017

    Journal: Polym. Test, Volume 60, JUL, page 422–431

    Authors: de Oliveira Santos, Rachel Passos; Manzolli Rodrigues, Bruno Vinicius; dos Santos, Danilo Martins; Campana-Filho, Sergio Paulo; Ruvolo-Filho, Adhemar C.; Frollini, Elisabete

    Organizations: FAPESP (Sao Paulo State Research Foundation); CNPq (National Council of Scientific Research); CAPES

    Keywords: Recycled PET; Cellulose; Lignin; Electrospinning; Ultrathin fibers/nanofibers

    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 10(4) nm(2) and 19.0 +/- 1.1%, respectively). The T-g values for electrospun PET combined with cellulose and/or lignin were higher than that of PETref (92.5 +/- 0.1 degrees 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. (C) 2017 Elsevier Ltd. All rights reserved.
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