Title Triboelectric properties of pdms-based composites filled with ferroelectric particles
Translation of Title PDMS pagrindu sudarytų kompozitų, užpildytų feroelektrinėmis dalelėmis, triboelektrinės savybės.
Authors Asad, Muhammad Shahzaib
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Pages 53
Keywords [eng] Triboelectric Nanogenerators (TENGs), Polydimethylsiloxane (PDMS), Barium Titanate (BaTiO3), Sodium Bismuth Titanate-Barium Titanate (80NBT-20BT), Ferroelectric Fillers, Contact Electrification, Electrostatic Induction, Surface Charge Density, Short Circuit Current (Isc), Open Circuit Voltage (Voc), Energy Harvesting, Dielectric Permittivity, Power Density, Polymer Composites, Ball Milling
Abstract [eng] The demand for sustainable and low cost renewable energy harvesting on a global scale has driven this research aimed to improve the performance of flexible PDMS based triboelectric nanogenerators (TENGs) using lead free ferroelectric fillers at 47wt% (80NBT-20BT and BaTiO3) of different sizes. To investigate the 80NBT-20BT particle size effect, the particle size was reduced from 300 ± 100 nm to 100 ± 50 nm by planetary ball milling. Three particle sizes (700nm, 300nm, and 80nm) of BaTiO3 were used. The experimental results show a great improvement in the triboelectric output compared to pure PDMS. The short circuit current, Isc, and positive/negative surface charge density increased from 1.2 µA and 1.1/-1.0 nC/cm2 (for pure PDMS) to 7.2 µA and 7.1/-7.2 nC/cm2 (for 80NBT-20BT), and to 7.7 µA and 5.58/-4.42 nC/cm2 (for BaTiO3), respectively. Among the fillers, BaTiO3 particles of 80nm in size showed a higher peak power density of 0.334 µW/cm² (at Rmax of 26.13 MΩ) and a high dielectric permittivity of 4.9. Furthermore, the applied force was demonstrated to increase the capacitance from 1.6 pF pure PDMS into 80 pF to 140 pF for all composite samples, as the internal air gaps decreased, providing enhanced charge storage stability. These results show that the optimized composites are ideal for self-powered wearable electronic devices, biomechanical sensors, and environmental energy harvesting applications.
Dissertation Institution Vilniaus universitetas.
Type Master thesis
Language English
Publication date 2026