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Molecular simulation on effect of silane coupling agent modified TiO2 on water molecular diffusion behavior in vegetable insulating oil
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Manqing ZHAO1, Yang WANG1, Jianfei LI1, Qiankai ZHANG1, Huaqiang LI2, Qingdong ZHU3
Insulating Materials | 2023, 56(11) : 57 - 64
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Insulating Materials | 2023, 56(11): 57-64
• Insulation Technology •
Molecular simulation on effect of silane coupling agent modified TiO2 on water molecular diffusion behavior in vegetable insulating oil
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Manqing ZHAO1, Yang WANG1, Jianfei LI1, Qiankai ZHANG1, Huaqiang LI2, Qingdong ZHU3
Affiliations
  • 1School of Electronics and Information, Xi′an Polytechnic University, Xi′an 710048, China
  • 2State Key Lab of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
  • 3State Grid Shandong Electric Power Company Electric Power Research Institute, Jinan 250001, China
Published: 2023-11-20 doi: 10.16790/j.cnki.1009-9239.im.2023.11.010
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The nanomolecular model of TiO2/vegetable oil interface structures before and after modification of two silane coupling agents (KH570 and KH792) were established by molecular dynamics simulation, and the effect of TiO2 interface before and after modification with silane coupling agents on the diffusion behavior of water molecules in oil were further investigated by dynamics simulation. The results show that compared with the untreated TiO2, the modified TiO2 interface has stronger adsorption of water molecules, which inhibits the migration behavior of water molecules in the oil, resulting in the significant reduction of their diffusion coefficient, thus reducing the formation of “small bridges” of water molecule impurities in the oil, and improving the insulating properties of vegetable insulating oil. Among them, the modification effect of KH792 is more significant. Further, by calculating the interaction energy between water molecules and TiO2 interface system, the number of hydrogen bonds form and the free volume fraction, the causes and physical mechanisms of above phenomena are explain, which provides theoretical support for the study of nanoparticle doping to improve the insulating properties of vegetable insulating oil.

vegetable insulating oil  /  nanoparticles  /  transformer  /  silane coupling agent  /  water content
Manqing ZHAO, Yang WANG, Jianfei LI, Qiankai ZHANG, Huaqiang LI, Qingdong ZHU. Molecular simulation on effect of silane coupling agent modified TiO2 on water molecular diffusion behavior in vegetable insulating oil[J]. Insulating Materials, 2023 , 56 (11) : 57 -64 . DOI: 10.16790/j.cnki.1009-9239.im.2023.11.010
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doi: 10.16790/j.cnki.1009-9239.im.2023.11.010
  • Receive Date：2022-12-08
  • Online Date：2025-11-24
  • Published：2023-11-20
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History
  • Received：2022-12-08
  • Revised：2023-01-21
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Affiliations
    1School of Electronics and Information, Xi′an Polytechnic University, Xi′an 710048, China
    2State Key Lab of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
    3State Grid Shandong Electric Power Company Electric Power Research Institute, Jinan 250001, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2023.11.010
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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