1. Biljana Pećanin, Univerzitet u Banjoj Luci, Tehnološki fakultet,
Republic of Srpska, Bosnia and Herzegovina
2. Slavica Maletić, Univerzitet u Beogradu, Fizički fakultet, Studentski trg 12, Beograd, Serbia
3. Dragana Grujić, Tehnološki fakultet Univerziteta u Banjoj Luci,
Republic of Srpska, Bosnia and Herzegovina
4. Branka Ružičić, University of Banja Luka, Faculty of Technology,
Republic of Srpska, Bosnia and Herzegovina
5. Manja Kurečič, Slovenia
6. Alen Erjavec, Slovenia
7. Dragana Cerović, University of Belgrade, Faculty of Physics, Serbia
8. Blanka Škipina, Tehnološki fakultet Univerziteta u Banjoj Luci,
Republic of Srpska, Bosnia and Herzegovina
Polylactic acid (PLA) has emerged as a promising bio-based polymer matrix for composite materials. To enhance the dielectric properties of polymers, barium titanate (BaTiO3) is commonly used as a high-permittivity ceramic filler. Its dielectric performance is strongly influenced by particle size, particularly when the filler dimensions are reduced to the nanoscale. In this study, micro- and nanosized BaTiO3 particles were incorporated into a PLA matrix under identical processing conditions. Dielectric measurements were performed in the frequency range from 30 Hz to 60 kHz. The incorporation of nano-BaTiO3 particles in polymer matrix resulted in a greater increase in dielectric permittivity compared with microcomposites. The 20 wt.% nano-BaTiO3 composite exhibited comparable permittivity to the 30 wt.% micro-BaTiO3 composite, indicating that similar enhancement can be achieved with lower filler content. The addition of BaTiO3 had no significant effect on electrical conductivity or dielectric losses, while the increased dielectric permittivity remained stable over the investigated frequency range. This suggests that the dielectric performance of PLA can be effectively enhanced without compromising its insulating properties.
Ključne reči :
Tematska oblast:
SIMPOZIJUM A - Nauka materije, kondenzovane materije i fizika čvrstog stanja
Datum:
22.07.2026.
Contemporary Materials 2026 - Savremeni Materijali
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