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首页> 外文期刊>Turkish Journal of Electrical Engineering and Computer Sciences >Effect of microano-SiO$_{2}$ on mechanical, thermal, and electrical properties of silicone rubber, epoxy, and EPDM composites for outdoor electrical insulations
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Effect of microano-SiO$_{2}$ on mechanical, thermal, and electrical properties of silicone rubber, epoxy, and EPDM composites for outdoor electrical insulations

机译：微米/纳米SiO $ _ {2} $对用于室外电气绝缘的硅橡胶，环氧树脂和EPDM复合材料的机械，热和电性能的影响

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In this paper the influence of micro-sized (3 $mu $m) and nano-sized (10 nm) silica (SiO$_{2})$ on mechanical, thermal, and electrical properties of silicon rubber (SiR), epoxy, and ethylene propylene diene monomer (EPDM) composites is presented. The micro- and nano-sized SiO$_{2}$ particle-filled SiR, epoxy, and EPDM composites were formulated with 20% microsilica and 5% nanosilica by weight respectively. Among these composites, SiR-SiO$_{2}$ amalgamation was performed by mixing using an ultrasonication procedure. Epoxy-SiO$_{2}$ was compounded in two steps, i.e. dispersion of fillers and mixing, whereas EPDM-SiO$_{2}$ compounding was performed with a two roll mill technique. With the addition of microano-SiO$_{2}$, the composites showed enhanced tensile strength of $sim $2.7 MPa, improved hardness, and reduced elongation at break. Further incorporation of microano-sized particles resulted in high thermal stability for SiR-nano composites (SNCs) as compared to epoxy and EPDM composites. Compared to SiR and EPDM composites, epoxy-nano composites showed the highest value of dielectric strength, i.e. 38.8 kV/mm. Meanwhile, the volume and surface resistivity of SNCs were found higher as compared to other investigated samples. Promising properties of SiR nanocomposites among all the investigated samples suggest that their application is more suitable for utilization in outdoor electrical insulations.
机译：本文研究了微米级（3μm）和纳米级（10 nm）二氧化硅（SiO $ _ {2}）$对硅橡胶（SiR）的机械，热学和电学性能的影响，介绍了环氧和乙烯丙烯二烯单体（EPDM）复合材料。分别由20％的微二氧化硅和5％的纳米二氧化硅配制了微米级和纳米级的SiO $ _ {2} $颗粒填充的SiR，环氧树脂和EPDM复合材料。在这些复合材料中，SiR-SiO $ _ {2} $的混合是通过使用超声处理进行混合来进行的。环氧树脂-SiO 2的分散是通过两步进行的，即填料的分散和混合，而EPDM-SiO 2的混合是通过两辊磨技术进行的。通过添加微米/纳米SiO $ _ {2} $，复合材料的抗张强度提高了2.7MPa，提高了硬度，并降低了断裂伸长率。与环氧树脂和EPDM复合材料相比，进一步掺入微米/纳米尺寸的颗粒可提高SiR-纳米复合材料（SNC）的热稳定性。与SiR和EPDM复合材料相比，环氧-纳米复合材料显示出最高的介电强度值，即38.8 kV / mm。同时，发现SNC的体积和表面电阻率高于其他研究样品。在所有研究的样品中，SiR纳米复合材料的优异性能表明，它们的应用更适合用于室外电气绝缘。

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