Surface Recovery Investigation of Silicone Rubber Composites for Outdoor Electrical Insulation under Accelerated Temperature and Humidity

Polymers

Nasim Ullah¹  Ahmad Aziz Alahmadi¹  Adam Khan²  Abasin Ulasyar³  Abraiz Khattak³  Safi Ullah Butt³  M. Hassan Raza³  Bilal Iqbal³  Asghar Ali⁴ 

[1] Department of Electrical Engineering, College of Engineering, Taif University KSA, P.O. Box 11099, Taif 21944, Saudi Arabia;Department of Electronics Engineering, University of Engineering and Technology (UET) Peshawar, Abbottabad 22010, Pakistan;High Voltage Engineering Laboratory, U.S.-Pakistan Center for Advanced Studies in Energy, National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, Pakistan;U.S.-Pakistan Center for Advanced Studies in Energy, Department of Energy System Engineering, National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, Pakistan;

关键词: silicone rubber;    silica;    alumina trihydrate;    SiO₂;    microcomposite;    nanocomposite;   

DOI  :  10.3390/polym13183024

来源: DOAJ

【 摘 要 】

Degradation of silicon rubber due to heat and humidity affect its performance in outdoor applications. To analyze the effects of high temperature and humidity on room temperature vulcanized (RTV) silicone rubber (SiR) and its composites, this study was performed. Five different sample compositions including neat silicone rubber (nSiR), microcomposites (15 wt% silica(SMC 15% SiO₂) and 15 wt% ATH(SMC 15% ATH), nanocomposite (2.5 wt% silica(SNC 2.5% SiO₂) and hybrid composite (10 wt% micro alumina trihydrate with 2 wt% nano silica(SMNC 10% ATH 2% SiO₂) were prepared and subjected to 70 ˚C temperature and 80% relative humidity in an environmental chamber for 120 h. Contact angle, optical microscopy and Fourier transform infrared (FTIR) spectroscopy were employed to analyze the recovery properties before and after applying stresses. Different trends of degradation and recovery were observed for different concentrations of composites. Addition of fillers improved the overall performance of composites and SMC 15% ATH composite performed better than other composites. For high temperature and humidity, the ATH-based microcomposite was recommended over silica due to its superior thermal retardation properties of ATH. It has been proved that ATH filler is able to withstand high temperature and humidity.

【 授权许可】

Unknown