Polyamide 6/modified pine bark particle composites for additive manufacturing
| Autor: | Dmitry V. Evtuguin, Artur Ferreira, Nuno Gama, Ana Barros-Timmons |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Thermogravimetric analysis
Materials science Scanning electron microscope Mechanical Engineering Chemical modification chemistry.chemical_compound chemistry Mechanics of Materials Polyamide Masterbatch Particle General Materials Science Fourier transform infrared spectroscopy Composite material Glass transition |
| Zdroj: | Journal of Materials Science. 56:19093-19105 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/s10853-021-06443-7 |
| Popis: | Aiming the sustainability of 3D-printed objects, in this study, pine bark particles were used as filler reinforcement for polyamide 6 (PA). In order to enhance the performance of the produced composites, the biomass was chemically modified via a two-step procedure. In the first step, the OH groups present on the particles surface were reacted with ethylenediamine, which were subsequently reacted with a polyol. Fourier-transform infrared spectroscopy (FTIR), 13C solid-state cross polarization–magic angle spinning nuclear magnetic resonance (13C CPMAS NMR) and scanning electron microscopy coupled with energy-dispersive X-ray analysis confirmed the chemical modification of biomass. The masterbatch was prepared from modified pine bark particles and polymeric matrix (PA) being processed into test specimens. The ensuing composites revealed a significant increase in Young's modulus and maximum stress. Thus, the introduction of 10% modified biomass increases the Young's modulus by 87% and the maximum stress by 15%. Furthermore, analyzing the glass transition temperature (Tg), melting flow index and thermogravimetric analysis results, the modified biomass ensuing composites proved to be suitable for 3D printing. This was attributed to better compatibility between chemically modified biomass and matrix and, further, easier processing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|