Theoretical prediction of percolation mechanisms on electrical conductivity of poly(lactic acid)–carbon nanotube composites in DC and RF regime
(2023) Micromachines — Vol. 16, n° 5, p. 5356 (2023)
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- Abstract
- Polymer composites based on polylactic acid (PLA) reinforced with 0.25–5 wt.% of carbon nanotubes (CNTs) were synthesized by melt blending. The static (DC) and microwave (RF) electrical conductivity have been investigated on the PLA–CNT composites. The electrical percolation threshold has been theoretically determined using classical models of percolation in order to predict the conductivity of the different nanocomposites. Through the fitting process, it has been found that the percolation threshold is obtained at 1 wt.% of CNTs in DC regime and reached below 0.25 wt.% of CNTs in microwave regime. Among the Mamunya, McLachlan or GEM models, the McCullough model remarkably fits the experimental DC and RF electrical conductivities. The obtained results are correlated to the electrical properties of a range of CNT-based composites, corresponding to the percolation threshold required for a three-dimensional network of CNTs into the polymer matrix.
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Beltran Freddys R., Aksas, H., Sidi Salah Lakhdar, Danlée, Y., & Huynen, I. (2023). Theoretical prediction of percolation mechanisms on electrical conductivity of poly(lactic acid)–carbon nanotube composites in DC and RF regime. Micromachines, 16(5), 5356. https://doi.org/10.3390/ma16155356 (Original work published 2023)