Journal of Iranian Ceramic Society
Volume 16, Issue 4 (Journal of Iranian Ceramic Society 2021)
Jicers 2021, 16(4): 59-75 |
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Nayebpashaee N, Taghvaee M, Sedighzadeh M. The effect of surface modification of ZnO and SiO2 nanoparticles and applying nano-RTV on improving the properties of porcelain insulators. Jicers 2021; 16 (4) :59-75
URL: http://jicers.ir/article-1-308-en.html
URL: http://jicers.ir/article-1-308-en.html
Standard Research Institute (SRI) , n.nayebpashaee@standard.ac.ir
Abstract: (2429 Views)
In recent years, RTV silicon rubber composite nano-coatings, a new generation of self-cleaning and hydrophobic coatings, have been introduced for use on insulators. In this paper, two different types of nano RTV composites containing ZnO and SiO2 nano particles were prepared. To improve the dispersion of these particles and avoid nanoparticle agglomeration, APTES and HMDS modifiers were used in preparation process of ZnO and SiO2 nanoparticles, respectively. Different experimental tests to measure characteristics of nanoparticles and the modified samples were performed before and after modification such as X-ray diffraction (XRD) analysis, BET analysis and field emission scanning electron microscopy (FESEM) and modification process was verified based on the relevant analyses. Finally, the modified nano- particles were added to RTV substance through acetone solution with particular ratio and the resulting nano RTV compositions and pure RTV were compared in terms of critical flashover voltages at different level of contamination, the adhesion test and hydrophobicity test. Nano-RTV (І) coating which contained ZnO particles showed improvement in withstand voltages in comparison with the pure RTV coating. Nano-RTV (Π) coating containing hybrid ZnO/SiO2 did not show sensible improvement in withstand voltages in comparison with the pure RTV. The static contact angle of 103.8 ± 1.5° was obtained on the RTV silicone rubber surface which increased to 114.1 ± 1.6° for the ZnO/RTV and 128.4 ± 3.4°for ZnO-SiO2/RTV coating. This confirmed that adding nano-particles to RTV produced a rough surface which assisted to its hydrophobicity. The results revealed that Nano-RTV (І) and nano-RTV (Π) showed improvement in surface hydrophobicity performance as compared with the pure RTV.
Keywords: Porcelain insulator, ZnO and SiO2 nanoparticles, Nano-RTV silicone rubber coating, polymer nanocoating, hydrophobicity.
Type of Study: Research |
Received: 2020/09/23 | Accepted: 2021/01/11
Received: 2020/09/23 | Accepted: 2021/01/11
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