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学者姓名：胡昊
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Abstract ：
Silicone rubber (SR) is extensively used as insulation for cable accessories, directly affecting their design and operation. The distinctive feature of cable accessory insulation, operating under mechanical stretching, has not received sufficient attention in relevant standards and research. This study investigates two essential electrical parameters of SR insulation: relative permittivity and AC breakdown strength, analysing and summarising their variations during mechanical stretching. By comparing the parameter variations of SR samples with different filler contents and matrix compositions, the microscopic stretching behaviour and performance change mechanisms under mechanical stretching are explored. The results reveal the tensile effect on SR insulation, demonstrating that as the stretching ratio increases, the relative permittivity decreases, whereas the AC breakdown strength shows an increasing trend. Increasing filler content and incorporating low molecular weight components suppress the tensile effect, whereas decreasing filler content has the opposite effect. Given the significant correlation between these two parameters, the orientation and elongation of molecular chains are considered the primary factors influencing the tensile effect on SR insulation. This insight proposes a novel approach to control and optimise the performance of cable accessory insulation.
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| GB/T 7714 | Hu, Hao , Cao, Binlong , Zhang, Yunxiao et al. Study on Electrical Properties of Silicone Rubber Insulation for Cable Accessories Under Mechanical Stretching [J]. | HIGH VOLTAGE , 2025 . |
| MLA | Hu, Hao et al. "Study on Electrical Properties of Silicone Rubber Insulation for Cable Accessories Under Mechanical Stretching" . | HIGH VOLTAGE (2025) . |
| APA | Hu, Hao , Cao, Binlong , Zhang, Yunxiao , Liu, Yuhao , Jia, Zhidong . Study on Electrical Properties of Silicone Rubber Insulation for Cable Accessories Under Mechanical Stretching . | HIGH VOLTAGE , 2025 . |
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Abstract ：
The insulation performance of power equipment is compromised by the aging effects of various physical fields, which can lead to failure. This study investigates the impact of interface modification on the aging behavior of composite materials. Polydopamine (PDA) is employed to modify the surface of boron nitride nanosheets (BNNS), enhancing their compatibility with silicone rubber (SIR). Thermal-mechanical aging tests are performed to compare the aging properties of various materials. The experimental results demonstrate that PDA-modified BNNS significantly enhance the DC electrical and mechanical properties of BNNS/SIR composites. Additionally, the PDA-modified BNNS/SIR exhibits superior aging resistance under thermal aging conditions. Although there is a more pronounced decline in insulation properties under thermal-mechanical aging, the PDA-modified BNNS/SIR still demonstrates better aging resistance compared to the unmodified BNNS/SIR. This study provides insight into developing insulation composites with excellent aging inhibition characteristics.
Keyword ：
aging inhibition characteristics aging inhibition characteristics electrical properties electrical properties interfacial modification interfacial modification silicone rubber silicone rubber thermal-mechanical aging thermal-mechanical aging
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| GB/T 7714 | Zhang, Yunxiao , Wu, Chengfeng , Yan, Chenning et al. Aging Inhibition Characteristics of Boron Nitride Nanosheets/Silicone Rubber Considering Interfacial Modification [J]. | POLYMER COMPOSITES , 2025 . |
| MLA | Zhang, Yunxiao et al. "Aging Inhibition Characteristics of Boron Nitride Nanosheets/Silicone Rubber Considering Interfacial Modification" . | POLYMER COMPOSITES (2025) . |
| APA | Zhang, Yunxiao , Wu, Chengfeng , Yan, Chenning , Hu, Hao , Liu, Yuhao , Zhou, Yuanxiang . Aging Inhibition Characteristics of Boron Nitride Nanosheets/Silicone Rubber Considering Interfacial Modification . | POLYMER COMPOSITES , 2025 . |
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Abstract ：
The electrical property parameters are crucial elements in the design of cable accessories, emphasizing the significance of precisely understanding their operational characteristics. This study investigates the variations in the electrical properties of silicone rubber (SR) insulation under mechanical stretching. The distribution characteristics of relative permittivity and ac breakdown strength are determined based on the mechanical stretching state. Furthermore, the electric field strength and safety margin are calculated to assess the operational capability of cable accessories. Comparatively, the mechanical stretching effects lead to increased electric field strength and breakdown strength, ultimately enhancing the safety margins of cable accessories, with a noticeable impact as the stretching degree increases. These findings suggest that the cable accessories exhibit a higher safety level than initially anticipated and that mechanical stretching should be thoroughly considered in their design.
Keyword ：
Analytical models Analytical models Cable accessory Cable accessory electrical property parameters electrical property parameters Electric breakdown Electric breakdown Electric fields Electric fields Mechanical cables Mechanical cables Mechanical factors Mechanical factors mechanical stretching mechanical stretching Permittivity Permittivity Power cable insulation Power cable insulation Power cables Power cables Safety Safety silicone rubber (SR) silicone rubber (SR) Stress Stress
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| GB/T 7714 | Hu, Hao , Li, Xiaodong , Fan, Weinan et al. Precise Operational Characteristics of Cable Accessories Considering Mechanical Stretching [J]. | IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION , 2025 , 32 (2) : 1246-1249 . |
| MLA | Hu, Hao et al. "Precise Operational Characteristics of Cable Accessories Considering Mechanical Stretching" . | IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION 32 . 2 (2025) : 1246-1249 . |
| APA | Hu, Hao , Li, Xiaodong , Fan, Weinan , Zhang, Yunxiao , Liu, Yuhao , Jia, Zhidong . Precise Operational Characteristics of Cable Accessories Considering Mechanical Stretching . | IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION , 2025 , 32 (2) , 1246-1249 . |
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