Flexible microwave absorbing composites based on polydimethylsiloxane filled with hybrid carbonaceous materials: Statistical analysis of the synergistic effect

Alessandra A. P. Gabino; Bluma G. Soares

doi:10.1002/pc.27426

journal article May 26, 2023

Flexible microwave absorbing composites based on polydimethylsiloxane filled with hybrid carbonaceous materials: Statistical analysis of the synergistic effect

Alessandra A. P. Gabino Bluma G. Soares

Polymer Composites Vol. 44 No. 8 pp. 4623-4640 · Wiley

View at Publisher Save 10.1002/pc.27426

Abstract

AbstractThe effect of the combination of carbon nanotubes (CNT) and graphene nanoplatelets (GNP) on the electromagnetic absorbing properties of polydimethylsiloxane (PDMS) composites was investigated. Samples were prepared by a low‐cost and scalable simple one‐step blending approach. The number of experiments and sample compositions were optimized by design of experiments (DOE) technique, namely, Axial Simplex Centroid. The samples were analyzed concerning rheology, electric conductivity and electromagnetic properties, such as absorptivity (reflection loss – RL). CNT was revealed to be more efficient than GNP in structuring the conductive network of filler particles. On the other hand, the hybrid filler composite with a 1:1 ratio (CNT/GNP = 0.67%:0.67%) presented the highest electric conductivity (3.53 × 10−3 S m−1) and the best overall electromagnetic results, with measured RL reaching −25 dB and effective absorption bandwidth frequency of 4.6 GHz, with sample 2 mm thick. The best calculated RL value for this sample was observed with 2.5 mm with RL value corresponding to −46.8 dB. The special cubic polynomial model was successfully adjusted to the experimental data and statistically proved the synergistic effect of the hybrid on the electromagnetic properties of PDMS composites. Finally, PDMS/CNT/GNP composites were successfully prepared by a simple, fast and inexpensive method.

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Details

Published: May 26, 2023
Vol/Issue: 44(8)
Pages: 4623-4640
License: View

Authors

A

Alessandra A. P. Gabino

Departamento de Engenharia Metalúrgica e de Materiais, Centro de Tecnologia Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil

B

Bluma G. Soares

Departamento de Engenharia Metalúrgica e de Materiais, Centro de Tecnologia Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil; Instituto de Macromoléculas, Centro de Tecnologia Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil

Funding

Conselho Nacional de Desenvolvimento Cientifico e Tecnologico Award: 305206/2020‐6

Fundação Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro Award: E‐26/200.848/2021

Cite This Article

Alessandra A. P. Gabino, Bluma G. Soares (2023). Flexible microwave absorbing composites based on polydimethylsiloxane filled with hybrid carbonaceous materials: Statistical analysis of the synergistic effect. Polymer Composites, 44(8), 4623-4640. https://doi.org/10.1002/pc.27426

Flexible microwave absorbing composites based on polydimethylsiloxane filled with hybrid carbonaceous materials: Statistical analysis of the synergistic effect

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