PMID- 32899363 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201028 IS - 2073-4360 (Electronic) IS - 2073-4360 (Linking) VI - 12 IP - 9 DP - 2020 Sep 3 TI - Leather Waste to Enhance Mechanical Performance of High-Density Polyethylene. LID - 10.3390/polym12092016 [doi] LID - 2016 AB - Leather buffing dust (BF) is a waste from tannery which is usually disposed on landfills. The interest in using wastes as fillers or reinforcements for composites has raised recently due to environmental concerns. This study investigates the potential use of BF waste as filler for a high density polyethylene matrix (HDPE). A series of HDPE-BF composites, containing filler concentrations ranging from 20 to 50wt%, were formulated, injection molded and tested. The effect of filler contents on the mechanical properties of the composites were evaluated and discussed. Composites with BF contents up to 30wt% improved the tensile strength and Young's modulus of the matrix, achieving similar mechanical properties to polypropylene (PP). In the case of flexural strength, it was found to be proportionally enhanced by increasing reinforcement content, maintaining high impact strength. These composites present great opportunities for PP application areas that require higher impact resistance. The materials were submitted to a series of closed-loop recycling cycles in order to assess their recyclability, being able to maintain better tensile strength than virgin HDPE after 5 cycles. The study develops new low-cost and sustainable composites by using a waste as composite filler. FAU - Kilic, Eylem AU - Kilic E AUID- ORCID: 0000-0001-8123-8632 AD - Material Science and Nanotechnology Engineering Department, Usak University, 64200 Usak, Turkey. FAU - Tarres, Quim AU - Tarres Q AUID- ORCID: 0000-0002-7021-2055 AD - LEPAMAP Research Group, University of Girona, 17003 Girona, Spain. AD - Catedra de Processos Industrials Sostenibles, University of Girona, 17003 Girona, Spain. FAU - Delgado-Aguilar, Marc AU - Delgado-Aguilar M AUID- ORCID: 0000-0002-1540-3326 AD - LEPAMAP Research Group, University of Girona, 17003 Girona, Spain. FAU - Espinach, Xavier AU - Espinach X AUID- ORCID: 0000-0002-6635-0260 AD - PRODIS Research Group, University of Girona, 17003 Girona, Spain. FAU - Fullana-I-Palmer, Pere AU - Fullana-I-Palmer P AD - UNESCO Chair in Life Cycle and Climate Change ESCI-UPF, Universitat Pompeu Fabra, 08003 Barcelona, Spain. FAU - Puig, Rita AU - Puig R AUID- ORCID: 0000-0002-9436-2074 AD - ABBU Research Group, Department of Computer Science and Industrial Engineering, Universitat de Lleida (UdL), 08700 Igualada, Spain. LA - eng GR - KAIROS-BIOCIR Project PID2019-104925RB (AEO/FEDER, UE)/Ministerio de Ciencia y Competitividad, Gobierno de Espana/ PT - Journal Article DEP - 20200903 PL - Switzerland TA - Polymers (Basel) JT - Polymers JID - 101545357 PMC - PMC7563937 OTO - NOTNLM OT - HDPE OT - buffing dust OT - circular economy OT - composites OT - recyclability COIS- The authors declare no conflict of interest. EDAT- 2020/09/10 06:00 MHDA- 2020/09/10 06:01 PMCR- 2020/09/03 CRDT- 2020/09/09 01:03 PHST- 2020/08/20 00:00 [received] PHST- 2020/08/27 00:00 [revised] PHST- 2020/08/30 00:00 [accepted] PHST- 2020/09/09 01:03 [entrez] PHST- 2020/09/10 06:00 [pubmed] PHST- 2020/09/10 06:01 [medline] PHST- 2020/09/03 00:00 [pmc-release] AID - polym12092016 [pii] AID - polymers-12-02016 [pii] AID - 10.3390/polym12092016 [doi] PST - epublish SO - Polymers (Basel). 2020 Sep 3;12(9):2016. doi: 10.3390/polym12092016.