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Biodegradable nanocomposites based on PLA/PHBV blend reinforced with carbon nanotubes with potential for electrical and electromagnetic applications

2021; Budapest University of Technology and Economics; Volume: 15; Issue: 10 Linguagem: Inglês

10.3144/expresspolymlett.2021.79

1788-618X

Ana Paula da Silva, Larissa Stieven Montagna, Fábio Roberto Passador, Mirabel Cerqueira Rezende, Ana Paula Lemes,

Electromagnetic wave absorption materials

The production of poly(lactic acid) (PLA) biodegradable blends with other biopolymers, such as poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), and the introduction of carbon nanotubes (CNT) are promising solutions for electrical and electromagnetic application.PHBV has a great potential to improve the processing and toughness of PLA.The addition of CNT contributes to the electrical and electromagnetic properties of polymeric nanocomposites.PLA/PHBV blend (80/20) and PLA/PHBV blend-based nanocomposites with 0.5 and 1.0 wt% of CNT were produced.Morphology images showed the homogeneous dispersion of PHBV domains in PLA, and that CNTs are preferably dispersed in the PHBV phase.The CNT acted as a nucleating agent for the crystallization of PHBV and did not affect the thermal stability of the nanocomposites.CNT reduced the Izod impact strength; however, flexural properties were not affected.The addition of 1.0 wt% CNT resulted in better electrical properties (2.79•10 -2 S/m) and an excellent result as electromagnetic interference shielding material (attenuation of approximately 96.9% of the radiation in X-band).Biodegradable nanocomposite based on PLA/PHBV blend reinforced with 1.0 wt% CNT presented interesting properties for possible applications in electronic device and military sectors.