Author(s):
1. Dragana Cerović, University of Belgrade, Faculty of Physics, Serbia
2. Ivan Petronijević, Univerzitet u Beogradu, Fizički fakultet, Studentski trg 12, Beograd, Serbia
3. Slavica Maletić, Univerzitet u Beogradu, Fizički fakultet, Studentski trg 12, Beograd, Serbia
4. Blanka Škipina, Faculty of Technology Banja Luka, Republic of Srpska, Bosnia and Herzegovina
5. Biljana Pećanin, Univerzitet u Banjoj Luci, Tehnološki fakultet, Republic of Srpska, Bosnia and Herzegovina
6. Dragana Grujić, Faculty of Technology Banja Luka, Republic of Srpska, Bosnia and Herzegovina
7. Branka Ružičić, University of Banja Luka, Faculty of Technology, Republic of Srpska, Bosnia and Herzegovina

Abstract:
The development of environmentally friendly materials from renewable resources that can be easily destroyed or recycled is increasingly becoming a task of today in order to preserve the environment and monitor sustainable development. This paper presents the preparation of composites by introducing different concentrations of lignocellulose-based biomass into an isotactic polypropylene matrix. Wheat, barley, rye and oat bran as so as corn granules obtained in Serbia were used as fillers. The influence of different filler concentrations of 20%, 30% and 40% on the dielectric loss factor ('') and electrical conductivity (σac) was analyzed. Measurements of dielectric parameters were performed at 13 test frequencies in the range from 30 Hz to 60 kHz at a temperature of 23°C. An increase in the values of the dielectric loss factor and electrical conductivity with an increase in the concentration of biomass filler was observed for all samples. With an increase in the frequency of the external field, a decrease in the value of the dielectric loss factor occurred, while the electrical conductivity increased for all samples.

Key words:
composite, biomass, dielectric loss factor, electrical conductivity

Thematic field:
SYMPOSIUM A - Science of matter, condensed matter and physics of solid states

Date of abstract submission:
29.06.2025.

Conference:
Contemporary Materials 2025 - Savremeni Materijali

Applied paper from author