Stability studies of alumina in 50–50 ethylene glycol–water dispersion
Artykuł w czasopiśmie
MNiSW
70
Lista 2024
| Status: | |
| Autorzy: | Kalbarczyk Marta, Skupiński Sebastian, Grządka Elżbieta, Terpiłowski Konrad, Kosmulski Marek |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | Pt 1 |
| Wolumen/Tom: | 749 |
| Strony: | 1 - 9 |
| Impact Factor: | 5,4 |
| Web of Science® Times Cited: | 0 |
| Scopus® Cytowania: | 0 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | TAK |
| Licencja: | |
| Sposób udostępnienia: | Witryna wydawcy |
| Wersja tekstu: | Ostateczna wersja opublikowana |
| Czas opublikowania: | W momencie opublikowania |
| Data opublikowania w OA: | 18 czerwca 2026 |
| Abstrakty: | angielski |
| This study investigates the stability of alumina (Alu C) nanodispersions prepared in a 50–50 ethylene glycol–water mixture for use as heat transfer fluids (HTF). The aim was to compare direct turbidimetric measurements of resistance of dispersions to aggregation and sedimentation with dispersion stability assessed from zeta potential. The effects of anionic (SDS) and cationic (CTMABr) surfactants, as well as analytical concentration of acid/ base adjusted with NaOH and HCl, were also examined. Only a moderate correlation was found between dispersion stability estimated from zeta potential values and that evaluated by Turbiscan analysis. Under alkaline conditions, increased particle size and higher Turbiscan Stability Index (TSI) values indicated progressive aggregation and sedimentation. The presence of SDS did not ensure long-term stability and, in some cases, promoted aggregation. In contrast, the highest stability was observed in acidified systems and in dispersions containing CTMABr, where only minor particle size changes and low TSI values were detected. Turbiscan analysis revealed markedly different destabilization behavior for positively and negatively charged dispersions despite comparable absolute zeta potential values. Combining electrokinetic and turbidimetric methods provides a more accurate and direct evaluation of dispersion stability and supports the development of functional, application-oriented nanofluids for heat transfer applications. |
