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Preparation and performance of healable silicone rubber insulating materials based on dynamic hindered urea bonds
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Dawei WANG1, Yingqiang SHANG1, Qing LIU1, Tianyu ZHENG1, Yiming XU2, Zepeng LÜ2, Lei ZHANG2
Insulating Materials | 2025, 58(5) : 22 - 29
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Insulating Materials | 2025, 58(5): 22-29
• Material Research •
Preparation and performance of healable silicone rubber insulating materials based on dynamic hindered urea bonds
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Dawei WANG1, Yingqiang SHANG1, Qing LIU1, Tianyu ZHENG1, Yiming XU2, Zepeng LÜ2, Lei ZHANG2
Affiliations
  • 1. State Grid Beijing Electric Power Company, Beijing 100022, China
  • 2. State Key Laboratory of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
Published: 2025-05-20 doi: 10.16790/j.cnki.1009-9239.im.2025.05.004
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To achieve the healability and reprocessability of silicone rubber insulating materials, it is feasible to introduce healable functional groups into the structural network of silicone rubber to extend its service life and reduce the safety hazards of power system operation. This paper used silane coupling agents to introduce amino groups into the main chain of silicone rubber, and then introduced dynamic hindered urea bonds into the silicone rubber network through the reversible reaction of isocyanates and hindered amines. A healable silicone rubber material was prepared, and the mechanical, electrical, healable, and reprocessable properties of silicone rubber were studied. The results show that the insulation performance of silicone rubber containing dynamically hindered urea bonds meets the application standards. Under certain temperature and pressure, silicone rubber samples can heal mechanical damage and electrical breakdown damage with high healing efficiency. The sample can be reprocessed through the cutting-hot pressing process, and the reprocessed sample can still retain certain mechanical and electrical insulation properties.

silicone rubber  /  dynamic hindered urea bonds  /  healable
Dawei WANG, Yingqiang SHANG, Qing LIU, Tianyu ZHENG, Yiming XU, Zepeng LÜ, Lei ZHANG. Preparation and performance of healable silicone rubber insulating materials based on dynamic hindered urea bonds[J]. Insulating Materials, 2025 , 58 (5) : 22 -29 . DOI: 10.16790/j.cnki.1009-9239.im.2025.05.004
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2025.05.004
  • Receive Date：2024-05-14
  • Online Date：2025-12-04
  • Published：2025-05-20
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  • Received：2024-05-14
  • Revised：2024-08-05
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Affiliations
    1. State Grid Beijing Electric Power Company, Beijing 100022, China
    2. State Key Laboratory of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
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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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