PMID- 33800605 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240331 IS - 2073-4360 (Electronic) IS - 2073-4360 (Linking) VI - 13 IP - 7 DP - 2021 Mar 28 TI - Development and Characterization of Rice Husk and Recycled Polypropylene Composite Filaments for 3D Printing. LID - 10.3390/polym13071067 [doi] LID - 1067 AB - Nowadays the use of natural fiber composites has gained significant interest due to their low density, high availability, and low cost. The present study explores the development of sustainable 3D printing filaments based on rice husk (RH), an agricultural residue, and recycled polypropylene (rPP) and the influence of fiber weight ratio on physical, thermal, mechanical, and morphological properties of 3D printing parts. Thermogravimetric analysis revealed that the composite's degradation process started earlier than for the neat rPP due to the lignocellulosic fiber components. Mechanical tests showed that tensile strength increased when using a raster angle of 0 degrees than specimens printed at 90 degrees , due to the weaker inter-layer bonding compared to in-layer. Furthermore, inter layer bonding tensile strength was similar for all tested materials. Scanning electron microscope (SEM) images revealed the limited interaction between the untreated fiber and matrix, which led to reduced tensile properties. However, during the printing process, composites presented lower warping than printed neat rPP. Thus, 3D printable ecofriendly natural fiber composite filaments with low density and low cost can be developed and used for 3D printing applications, contributing to reduce the impact of plastic and agricultural waste. FAU - Morales, Maria A AU - Morales MA AD - Grupo de Diseno de Productos y Procesos (GDPP), Department of Chemical and Food Engineering, Universidad de los Andes, CR 1 18a 12, Bogota 111711, Colombia. FAU - Atencio Martinez, Cindy L AU - Atencio Martinez CL AUID- ORCID: 0000-0003-3984-2435 AD - Grupo de Diseno de Productos y Procesos (GDPP), Department of Chemical and Food Engineering, Universidad de los Andes, CR 1 18a 12, Bogota 111711, Colombia. FAU - Maranon, Alejandro AU - Maranon A AD - Structural Integrity Research Group, Department of Mechanical Engineering, Universidad de los Andes, CR 1 18a 12, Bogota 111711, Colombia. FAU - Hernandez, Camilo AU - Hernandez C AUID- ORCID: 0000-0002-0596-439X AD - Sustainable Design in Mechanical Engineering Research Group (DSIM), Department of Mechanical Engineering, Escuela Colombiana de Ingenieria Julio Graravito, Autopista Norte AK 45 205 59, Bogota 111166, Colombia. FAU - Michaud, Veronique AU - Michaud V AD - Laboratory for Processing for Advanced Composited (LPAC), Institute of Materials, Ecole Polytechnique Federale de Lausanne (EPFL), EPFL-STI-IMX-LPAC, Station 12, CH-1015 Lausanne, Switzerland. FAU - Porras, Alicia AU - Porras A AUID- ORCID: 0000-0002-6943-4101 AD - Grupo de Diseno de Productos y Procesos (GDPP), Department of Chemical and Food Engineering, Universidad de los Andes, CR 1 18a 12, Bogota 111711, Colombia. LA - eng GR - Codev 2019 Seed Money Grant/EPFL/ GR - 1st Tech4Dev Call 3DP4Peace/EPFL (Tech4Dev and SDC Fund)/ PT - Journal Article DEP - 20210328 PL - Switzerland TA - Polymers (Basel) JT - Polymers JID - 101545357 PMC - PMC8037629 OTO - NOTNLM OT - 3D printing OT - composites OT - fused filament fabrication OT - recycled polypropylene OT - rice husk COIS- The authors declare no conflict of interest. EDAT- 2021/04/04 06:00 MHDA- 2021/04/04 06:01 PMCR- 2021/03/28 CRDT- 2021/04/03 01:06 PHST- 2021/03/01 00:00 [received] PHST- 2021/03/20 00:00 [revised] PHST- 2021/03/25 00:00 [accepted] PHST- 2021/04/03 01:06 [entrez] PHST- 2021/04/04 06:00 [pubmed] PHST- 2021/04/04 06:01 [medline] PHST- 2021/03/28 00:00 [pmc-release] AID - polym13071067 [pii] AID - polymers-13-01067 [pii] AID - 10.3390/polym13071067 [doi] PST - epublish SO - Polymers (Basel). 2021 Mar 28;13(7):1067. doi: 10.3390/polym13071067.