Effect of water on the breakdown and dielectric response of polypropylene/nano-aluminium nitride composites
| Autor: | George Chen, Yanqiu Zhu, Thomas Andritsch, Dayuan Qiang, Xinyu Wang, Ian L. Hosier |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Polypropylene Permittivity Materials science Aluminium nitride Mechanical Engineering Composite number 02 engineering and technology Nitride 021001 nanoscience & nanotechnology 01 natural sciences Silane chemistry.chemical_compound chemistry Mechanics of Materials 0103 physical sciences General Materials Science Dielectric loss Composite material 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | Journal of Materials Science. 55:8900-8916 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/s10853-020-04635-1 |
| Popis: | The influence of water immersion and silane treatment on the AC breakdown and the complex dielectric response of polypropylene/nano-aluminium nitride (PP/nano-AlN) composites has been investigated. The as-received filler was examined to have a nanoscale particle distribution with a hexagonal shape and slight hydrolysation. Grafting the aluminium nitride with an octyl silane reduces the weight increase in samples filled with 10 wt% of aluminium nitride during water immersion by 3, from 0.29 to 0.09%. The results suggest that the AC breakdown strength and complex permittivity of “wet” composite samples are related to the silane treatment of the nanofiller. The AC breakdown strength of octyl silane-treated samples after 9 days of water immersion shows comparable results to the dry samples, while a reduction can be seen on non-treated samples. Although silane-treated samples still show an increased dielectric loss at low frequency after water immersion, a significant reduction in low-frequency dispersion of real and imaginary permittivity can be seen when compared to the non-treated composites. This indicates that significant gains can be obtained for PP/nano-AlN composites by suitable silane treatments. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |