Dielectric Properties of Functional Nanofluids Based on Ni, Cu, and Ag Nanoparticles Deposited in Liquid Polymers
Artykuł w czasopiśmie
MNiSW
100
Lista 2024
| Status: | |
| Autorzy: | Boiko Oleksandr, Biliak Kateryna, Vahl Alexander, Nikitin Daniil |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 25 |
| Strony: | 99 - 106 |
| Web of Science® Times Cited: | 0 |
| Scopus® Cytowania: | 0 |
| Bazy: | Web of Science | Scopus | Google Scholar |
| Efekt badań statutowych | NIE |
| Finansowanie: | The research was funded by the Lublin University of Technology program titled „Investing in Potential” (Grant No: 26/IP/2025/F). |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| This article presents an analysis of the AC dielectric properties of functional nanofluids (NFs). The structure of the samples consists of base fluids (BF), including polyethylene glycol (PEG), silicone oil (SO), propylene carbonate (PC) and hydroxyethyl methacrylate (HEMA), as well as nanofillers such as nickel, copper and silver nanoparticles (NPs), with a mean size of 17-51 nm and concentrations 200-2000 µg/ml. The NFs were produced using both a one-step and a two-step methods. The experimental section includes SEM investigation, electrical characterization of PEG-based NFs, and determination of the impact on the NF’s conductivity of NPs type, concentration and size. Impedance, phase shift angle, loss factor, capacitance, real and imaginary permittivity, and conductivity were measured for frequencies of 4 Hz-8 MHz at room temperature (RT). The entire frequency range was divided into two energy regions: capacitive and quasi-resistive. For each sample, a resonant frequency fR was identified, below which interfacial polarization occurs at nanoparticle and electrical contact boundaries, while above it atomic polarization dominates due to the stronger AC field effect on nanoparticle electron clouds. The conductivity is significantly impacted by the NP’s type and concentration. No clear effect of NP size on NF conductivity was observed. |
