The Application of Polyhedral Oligomeric Silsesquioxanes on Vegetable Insulating Oil Modification

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-01 DOI:10.1109/ICDL.2019.8796708

Qiuhuang Han, Feipeng Wang, Jian Li, Kaizheng Wang, Qi Zhao, Kelin Hu

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Abstract

Vegetable insulating oils, as promising substitutes for mineral insulating oils, have gained a lot of researches on their modification. Polyhedral Oligomeric Silsesquioxanes (POSS), a hybrid organic-inorganic nanoparticle, is of great prospect in vegetable insulating oil modification based on its remarkable dispersion property in organic liquids. In this research, the test material of vegetable oil (FR3, to be specified) was mixed with OctaMethyl-POSS (OM-POSS) in several different concentrations 0, 0.001, 0.004, 0.007 and 0.01 wt.% to make modified dielectric nanofluids. The AC breakdown strength and dielectric properties (relative permittivity, electrical conductivity and dissipation factor) of POSS-based oils were investigated. The experimental results showed that the AC breakdown strength of POSS-based nanofluids increased in a proper concentration range, while the permittivity, conductivity and dissipation factor of tested samples exhibited a reduction with proper POSS concentrations, where the model of interfacial zone was applied to explain the mechanism.

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多面体低聚硅氧烷在蔬菜绝缘油改性中的应用

植物绝缘油作为矿物绝缘油的有前途的替代品，在其改性方面得到了大量的研究。多面体低聚硅氧烷(POSS)是一种有机-无机杂化纳米粒子，由于其在有机液体中的优异分散性能，在植物绝缘油改性方面具有广阔的应用前景。在本研究中，将植物油(FR3，待定)的测试材料与不同浓度的OctaMethyl-POSS (OM-POSS)以0、0.001、0.004、0.007和0.01 wt.%混合制成改性介电纳米流体。研究了poss基油的交流击穿强度和介电性能(相对介电常数、电导率和耗散系数)。实验结果表明，在适当的POSS浓度范围内，POSS纳米流体的交流击穿强度增加，而在适当的POSS浓度范围内，测试样品的介电常数、电导率和耗散系数降低，其中界面区模型可以解释其机理。

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