Enhancing robotic artificial muscle functionality: exploring piezoelectric properties of coordination polymers
Advancements in prosthetic technologies have led to significant improvements in functionality, but challenges in strength, adaptability, and actuation mechanisms still persist. Traditional approaches, often reliant on electronic circuits and motors, struggle to replicate the flexibility and efficien...
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| Formatua: | masterThesis |
| Hizkuntza: | eng |
| Argitaratua: |
2024
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| Gaiak: | |
| Sarrera elektronikoa: | http://repositorio.yachaytech.edu.ec/handle/123456789/853 |
| Etiketak: |
Etiketa erantsi
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Etiketa erantsi | Gaia: | Advancements in prosthetic technologies have led to significant improvements in functionality, but challenges in strength, adaptability, and actuation mechanisms still persist. Traditional approaches, often reliant on electronic circuits and motors, struggle to replicate the flexibility and efficiency of biological systems. In response, researchers have turned to biologically inspired musculoskeletal systems that incorporate advanced materials such as shape memory polymers, alloys, and piezoelectric materials. Piezoelectric materials are particularly promising due to their high efficiency and bandwidth, but their application has been limited by low actuation strains. While much attention has been given to well-established piezoceramics, other classes of piezoelectric materials, like polymers, are gaining recognition for their improved mechanical flexibility and potential for enhanced actuation performance. Among these, coordination polymers represent a new and promising category. This study investigates the potential of coordination polymers as a solution, which combine enhanced piezoelectric coefficients with mechanical flexibility. These polymers were synthesized using zinc nitrate, 2-methylimidazole, and cinnamic acid, followed by integration into a polylactic acid matrix. Structural characterization confirmed the bidentate coordination of cinnamic acid, with X-ray diffraction indexing the samples in the non-centrosymmetric C2 and P21 space groups, essential for piezoelectric behavior. The piezoelectric measurement system was evaluated, finding a reference value of 15.70 μCN-1 for a PZT sample, which underscored the importance of system calibration. Despite the promising structural properties, composites containing 0.5 wt.% of the synthesized coordination polymers showed no measurable piezoelectric effect under applied forces up to 200 N. These findings highlight the need for further investigation into the material's piezoelectric behavior and the factors that may be inhibiting their performance in practical applications. |
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