Ballistic resistance and microwave absorbing properties of a composite made of aramid fabric impregnated with polyethylene glycol and hematite nanoparticles


  • Danúbia Bordim de Carvalho
  • Roberto da Costa Lima
  • Letícia dos Santos Aguilera
  • Ronaldo Sergio de Biasi
  • André Ben-Hur da Silva Figueiredo



radar absorption, ballistic shielding, ballistic impact, shear thickening fluid


The ballistic resistance and microwave absorption of a composite of aramid fabric impregnated with polyethylene glycol and hematite nanoparticles was investigated for different hematite concentrations between 0 and 17 wt%. Different damage and energy absorbing mechanisms during ballistic impact were identified: cone formation on the back face of the target, tensile failure of primary yarns and deformation of secondary yarns. In terms of energy absorption, the best results were achieved with 7 wt% hematite, while the smallest depth of penetration (DOP) was observed for a composite with 9 wt% hematite. A scanning electron microscope (SEM) image of the composite with 7% hematite after the ballistic test showed that the main energy absorption mechanism was deformation of secondary yarns. The microwave absorption was measured using the waveguide technique in the frequency range from 8 to 12 GHz. The results showed that the dielectric loss ɛ”/ɛ’ is maximum for a concentration of 3% hematite, while the magnetic loss µ”/µ’ is maximum for a concentration of 11 wt% hematite. A reasonable compromise between ballistic resistance and microwave absorption seems to be a composite with 7 wt% hematite.


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How to Cite

Carvalho, D. B. de, Lima, R. da C., Aguilera, L. dos S., Biasi, R. S. de, & Figueiredo, A. B.-H. da S. (2024). Ballistic resistance and microwave absorbing properties of a composite made of aramid fabric impregnated with polyethylene glycol and hematite nanoparticles. OBSERVATÓRIO DE LA ECONOMÍA LATINOAMERICANA, 22(3), e3739.




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