| Autor: |
Dos Santos AL; GEMATA-LEEN, Department of Chemistry, University Federal of Amazonas, Manaus 69067-005, AM, Brazil., de Souza FCR; GEMATA-LEEN, Department of Chemistry, University Federal of Amazonas, Manaus 69067-005, AM, Brazil., Martins da Costa JC; GEMATA-LEEN, Department of Chemistry, University Federal of Amazonas, Manaus 69067-005, AM, Brazil., Gonçalves DA; GEMATA-LEEN, Department of Chemistry, University Federal of Amazonas, Manaus 69067-005, AM, Brazil., Passos RR; GEMATA-LEEN, Department of Chemistry, University Federal of Amazonas, Manaus 69067-005, AM, Brazil., Pocrifka LA; GEMATA-LEEN, Department of Chemistry, University Federal of Amazonas, Manaus 69067-005, AM, Brazil. |
| Abstrakt: |
This research introduces a new way to create a composite material (PLA/EG) for 3D printing. It combines polylactic acid (PLA) with exfoliated graphite (EG) using a physical mixing method, followed by direct mixing in a single-screw extruder. Structural and vibrational analyses using X-ray diffraction and Fourier transform infrared spectroscopy confirmed the PLA/EG's formation (composite). The analysis also suggests physical adsorption as the primary interaction between the two materials. The exfoliated graphite acts as a barrier (thermal behavior), reducing heat transfer via TG. Electrochemical measurements reveal redox activity (cyclic voltammetry) with a specific capacitance of ~ 6 F g -1 , low solution resistance, and negligible charge transfer resistance, indicating ion movement through a Warburg diffusion process. Additionally, in terms of complex behavior (electrochemical impedance spectroscopy), the PLA/EG's actual capacitance C'(ω) displayed a value greater than 1000 μF cm -2 , highlighting the composite's effectiveness in storing charge. These results demonstrate that PLA/EG composites hold significant promise as electrodes in electronic devices. The methodology used in this study not only provides a practical way to create functional composites but also opens doors for new applications in electronics and energy storage. |
