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Thermal Ageing Behavior of Oil-paper Insulation and Evolution of Fiber Refractive Index
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Wei YAO1, Degui YAO1, Feipeng WANG2, Chao SONG2, Kai PANG1, Huahua XIONG3
Insulating Materials | 2021, 54(7) : 81 - 87
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Insulating Materials | 2021, 54(7): 81-87
• Insulation Technology •
Thermal Ageing Behavior of Oil-paper Insulation and Evolution of Fiber Refractive Index
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Wei YAO1, Degui YAO1, Feipeng WANG2, Chao SONG2, Kai PANG1, Huahua XIONG3
Affiliations
  • 1Electric Power Research Institute of State Grid Henan Electric Power Company, Zhengzhou 450000, China
  • 2State Key Laboratory of Power Transmission Equipment and System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
  • 3Zhengzhou Power Supply Company, State Grid Henan Electric Power Company, Zhengzhou 450000, China
Published: 2021-07-20 doi: 10.16790/j.cnki.1009-9239.im.2021.07.012
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The thermal ageing behavior of insulating paper and the evolution of refractive index of cellulose fiber during thermal ageing process were explored. Accelerated thermal ageing experiments were carried out on the oil-paper samples at 120℃ and 130℃, respectively. The degree of polymerization, furfural content, and carbon and oxygen gas content were measured at different ageing periods, and their changing laws were explored. According to the change trend of the crystallinity of insulating paper in the test, a reasonable inference was made about the change of its refractive index, and further analysis was carried out by the Abbe refractometer. On the basis of dispersion staining color method, the evolution rule of refractive index of the oil-paper cellulose fiber during thermal ageing was explored. The results show that as the ageing progresses, the degree of polymerization decreases, while the furfural content and the carbon oxygen gas content increase, the refractive index and crystallinity of the insulating paper increases, and the refractive index of the oil-paper cellulose fiber increases also. The refractive index of cellulose can be considered as a new type of ageing characteristic of insulating paper.

insulating paper  /  characteristic quantity  /  dispersion staining color  /  fiber  /  refractive index
Wei YAO, Degui YAO, Feipeng WANG, Chao SONG, Kai PANG, Huahua XIONG. Thermal Ageing Behavior of Oil-paper Insulation and Evolution of Fiber Refractive Index[J]. Insulating Materials, 2021 , 54 (7) : 81 -87 . DOI: 10.16790/j.cnki.1009-9239.im.2021.07.012
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doi: 10.16790/j.cnki.1009-9239.im.2021.07.012
  • Receive Date：2020-08-16
  • Online Date：2026-03-20
  • Published：2021-07-20
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History
  • Received：2020-08-16
  • Revised：2020-10-31
Funding
Affiliations
    1Electric Power Research Institute of State Grid Henan Electric Power Company, Zhengzhou 450000, China
    2State Key Laboratory of Power Transmission Equipment and System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
    3Zhengzhou Power Supply Company, State Grid Henan Electric Power Company, Zhengzhou 450000, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2021.07.012
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Citations
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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