PU composites based on different types of textile fibers
authors Gama, N; Godinho, B; Barros-Timmons, A; Ferreira, A
nationality International
journal JOURNAL OF COMPOSITE MATERIALS
author keywords Textile fibers composites; textile fibers; recycling; circular economy; renewable raw-materials
keywords MECHANICAL-PROPERTIES; WATER-ABSORPTION; POLYPROPYLENE COMPOSITES; DEGRADATION BEHAVIOR; THERMAL-DEGRADATION; MATRIX COMPOSITES; POLYMER; POROSITY; SURFACE; RICINOLEATE
abstract In this study polyurethane (PU) residues were mixed with residues of textile fibers (cotton, wool and synthetic fibers up to 70 wt/wt) to produce 100% recycled composites. In addition, the effect of the type of fiber on the performance of the ensuing composites was evaluated. The presence of fibers showed similar effect on the density, reducing the density in the 5.5-9.0% range. In a similar manner, the addition of fillers decreased their thermal conductivity. The 70 wt/wt wool composite presented 38.1% lower thermal conductivity when compared to the neat matrix, a reduction that was similar for the other type of fibers. Moreover, the presence of fillers yields stiffer materials, especially in the case of the Wool based composites, which with 70 wt/wt of filler content increased the tensile modulus of the ensuing material 3.4 times. This was attributed to the aspect ratio and stiffness of this type of fiber. Finally, the high-water absorption and lower thermal stability observed, especially in the case of the natural fibers, was associated with the hydrophilic nature of fibers and porosity of composites. Overall, the results suggest that these textile-based composites are suitable for construction and automotive applications, with the advantage of being produced from 100% recycled raw-materials, without compromised performance.
publisher SAGE PUBLICATIONS LTD
issn 0021-9983
isbn 1530-793X
year published 2021
volume 55
issue 24
beginning page 3615
ending page 3626
digital object identifier (doi) 10.1177/00219983211031656
web of science category 12
subject category Materials Science, Composites
unique article identifier WOS:000682561500001

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