Please use this identifier to cite or link to this item: https://hdl.handle.net/10953/1424
Title: Flexural Properties and Mean Intrinsic Flexural Strength of Old Newspaper Reinforced Polypropylene Composites
Authors: Tarrés, Quim
Soler, Jordi
Rojas Sola, José Ignacio
Oliver Ortega, Helena
Julián, Fernando
Espinach, F. Xavier
Mutjé, Pere
Delgado Aguilar, Marc
Abstract: Newspapers have a limited lifespan, and therefore represent a focus of used and disposed paper. While these refuses have a considerable value and can be easily recycled, a considerable fraction ends in landfill. The authors show the possibility of adding value to used newspaper and enlarge its value chain. Old newspaper incorporates a high amount of wood fibers able to be used as reinforcement. On the other hand, this material also incorporates inks and other components inherent to newspaper production. In this work, the authors disintegrate old newspaper to recover and individualize wood fibers. A morphological analysis showed that the recovered fibers had aspect ratios higher than 10, revealing, a priori, their strengthening capabilities. Thereupon, these fibers were compounded with polypropylene at different contents, ranging from 20% to 50% w/w. It is well known that wood fibers are hydrophilic, while polyolefin are hydrophobic. This is a drawback to obtaining strong interfaces. Thus, two sets of composites were produced, with and without a coupling agent. The results showed that uncoupled composites increased the flexural strength of the matrix but reached an equilibrium point from which adding more reinforcement did not changer the flexural strength. On the other hand, the coupled composites showed a linear increase of the flexural strength against the reinforcement content. The flexural moduli of the coupled and uncoupled composites were very similar and evolved linearly with the reinforcement content.
Keywords: natural fibers
recycled paper
composites
polypropylene
flexural strength
Issue Date: 26-Jul-2019
metadata.dc.description.sponsorship: This research was funded by the University of Girona.
Publisher: Multidisciplinary Digital Publishing Institute
Citation: Tarrés, Q.; Soler, J.; Rojas-Sola, J.I.; Oliver-Ortega, H.; Julián, F.; Espinach, F.X.; Mutjé, P.; Delgado-Aguilar, M. Flexural Properties and Mean Intrinsic Flexural Strength of Old Newspaper Reinforced Polypropylene Composites. Polymers 2019, 11, 1244. https://doi.org/10.3390/polym11081244
Appears in Collections:DIGDP-Artículos

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