The Effects of Reprocessing and Fiber Treatments on the Properties of Polypropylene-Sugarcane Bagasse Biocomposites
This study explores the reprocessing behavior of polypropylene-sugarcane bagasse biocomposites using neat and chemically treated bagasse fibers (20 wt.%). Biocomposites were reprocessed 5 times using the extrusion process followed by injection molding. The mechanical properties indicate that microfi...
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doaj-99be133b3f754fda9f47bca0214e012b2020-11-25T03:52:40ZengMDPI AGPolymers2073-43602020-06-01121440144010.3390/polym12071440The Effects of Reprocessing and Fiber Treatments on the Properties of Polypropylene-Sugarcane Bagasse BiocompositesJuan P. Correa-Aguirre0Fernando Luna-Vera1Carolina Caicedo2Bairo Vera-Mondragón3Miguel A. Hidalgo-Salazar4Research Group for Manufacturing Technologies GITEM, Universidad Autónoma de Occidente, Cali 760030, ColombiaResearch Group for Development of Materials and Products GIDEMP, National Center for Technical Assistance to Industry (ASTIN-SENA), Cali 760003, ColombiaResearch Group for Development of Materials and Products GIDEMP, National Center for Technical Assistance to Industry (ASTIN-SENA), Cali 760003, ColombiaResearch Group for Development of Materials and Products GIDEMP, National Center for Technical Assistance to Industry (ASTIN-SENA), Cali 760003, ColombiaResearch Group for Manufacturing Technologies GITEM, Universidad Autónoma de Occidente, Cali 760030, ColombiaThis study explores the reprocessing behavior of polypropylene-sugarcane bagasse biocomposites using neat and chemically treated bagasse fibers (20 wt.%). Biocomposites were reprocessed 5 times using the extrusion process followed by injection molding. The mechanical properties indicate that microfibers bagasse fibers addition and chemical treatments generate improvements in the mechanical properties, reaching the highest performance in the third cycle where the flexural modulus and flexural strength increase 57 and 12% in comparison with neat PP. differential scanning calorimetry (DSC) and TGA characterization show that bagasse fibers addition increases the crystallization temperature and thermal stability of the biocomposites 7 and 39 °C respectively, without disturbing the melting process of the PP phase for all extrusion cycles. The rheological test shows that viscosity values of PP and biocomposites decrease progressively with extrusion cycles; however, Cole–Cole plots, dynamic mechanical analysis (DMA), width at half maximum of tan delta peaks and SEM micrographs show that chemical treatments and reprocessing could improve fiber dispersion and fiber–matrix interaction. Based on these results, it can be concluded that recycling potential of polypropylene-sugarcane bagasse biocomposites is huge due to their mechanical, thermal and rheological performance resulting in advantages in terms of sustainability and life cycle impact of these materials.https://www.mdpi.com/2073-4360/12/7/1440biocompositesrecyclingrheological propertiesDMAinjection molding |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Juan P. Correa-Aguirre Fernando Luna-Vera Carolina Caicedo Bairo Vera-Mondragón Miguel A. Hidalgo-Salazar |
spellingShingle |
Juan P. Correa-Aguirre Fernando Luna-Vera Carolina Caicedo Bairo Vera-Mondragón Miguel A. Hidalgo-Salazar The Effects of Reprocessing and Fiber Treatments on the Properties of Polypropylene-Sugarcane Bagasse Biocomposites Polymers biocomposites recycling rheological properties DMA injection molding |
author_facet |
Juan P. Correa-Aguirre Fernando Luna-Vera Carolina Caicedo Bairo Vera-Mondragón Miguel A. Hidalgo-Salazar |
author_sort |
Juan P. Correa-Aguirre |
title |
The Effects of Reprocessing and Fiber Treatments on the Properties of Polypropylene-Sugarcane Bagasse Biocomposites |
title_short |
The Effects of Reprocessing and Fiber Treatments on the Properties of Polypropylene-Sugarcane Bagasse Biocomposites |
title_full |
The Effects of Reprocessing and Fiber Treatments on the Properties of Polypropylene-Sugarcane Bagasse Biocomposites |
title_fullStr |
The Effects of Reprocessing and Fiber Treatments on the Properties of Polypropylene-Sugarcane Bagasse Biocomposites |
title_full_unstemmed |
The Effects of Reprocessing and Fiber Treatments on the Properties of Polypropylene-Sugarcane Bagasse Biocomposites |
title_sort |
effects of reprocessing and fiber treatments on the properties of polypropylene-sugarcane bagasse biocomposites |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2020-06-01 |
description |
This study explores the reprocessing behavior of polypropylene-sugarcane bagasse biocomposites using neat and chemically treated bagasse fibers (20 wt.%). Biocomposites were reprocessed 5 times using the extrusion process followed by injection molding. The mechanical properties indicate that microfibers bagasse fibers addition and chemical treatments generate improvements in the mechanical properties, reaching the highest performance in the third cycle where the flexural modulus and flexural strength increase 57 and 12% in comparison with neat PP. differential scanning calorimetry (DSC) and TGA characterization show that bagasse fibers addition increases the crystallization temperature and thermal stability of the biocomposites 7 and 39 °C respectively, without disturbing the melting process of the PP phase for all extrusion cycles. The rheological test shows that viscosity values of PP and biocomposites decrease progressively with extrusion cycles; however, Cole–Cole plots, dynamic mechanical analysis (DMA), width at half maximum of tan delta peaks and SEM micrographs show that chemical treatments and reprocessing could improve fiber dispersion and fiber–matrix interaction. Based on these results, it can be concluded that recycling potential of polypropylene-sugarcane bagasse biocomposites is huge due to their mechanical, thermal and rheological performance resulting in advantages in terms of sustainability and life cycle impact of these materials. |
topic |
biocomposites recycling rheological properties DMA injection molding |
url |
https://www.mdpi.com/2073-4360/12/7/1440 |
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