C4F7N/CO2/O2与三元乙丙橡胶的相容性及相互作用机理研究

doi:10.19595/j.cnki.1000-6753.tces.201700

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摘要 C₄F₇N混合气体凭借良好的电气性能以及较低的温室效应潜在值近年来备受关注。然而,在C₄F₇N及其混合气体投入实际使用以前,其与气体绝缘设备内部密封材料的相容性仍需检验。目前虽然已有关于该气体与三元乙丙橡胶的相容性研究,但对于不同第三单体的三元乙丙橡胶与C₄F₇N混合气体的相容性对比以及气固相互作用机理的相关报道较少。该文选取ENB、DCPD两种第三单体的三元乙丙橡胶开展了其与C₄F₇N/CO₂/O₂混合气体的相容性实验,发现三元乙丙橡胶中的某些活性结构与C₄F₇N的CN基团之间存在反应,而通过涂覆硅脂能够有效阻隔气体与橡胶表面的接触,减少C₄F₇N的分解。此外,在对比两种橡胶的实验结果后发现,ENB-三元乙丙橡胶相较于DCPD-三元乙丙橡胶更适合用作C₄F₇N混合气体的密封材料,其差异来自两种第三单体所能提供的交联效率不同。

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关键词 ：环保型绝缘气体, C₄F₇N/CO₂/O₂, 三元乙丙橡胶, 相容性

Abstract：C₄F₇N mixed gases have attracted much attention in recent years due to their excellent electrical properties and low global warming potential value. However, the compatibility of C₄F₇N and its gas mixture with the internal sealing materials of gas insulated equipment still needs to be tested before it is put into field application. At present, there have been some studies on the compatibility of C₄F₇N with EPDM, but few of them focus on the compatibility comparison between C₄F₇N gas mixtures and EPDM with different third monomers and the mechanism of gas-solid interaction. In this paper, ENB-EPDM and DCPD-EPDM were selected and the compatibility experiment was carried out with C₄F₇N/CO₂/O₂ mixed gases. The results reveal that some active structures in EPDM reacted with the CN group of C₄F₇N. The contact between gas and rubber surface could be effectively blocked by coating silicone grease, and the decomposition of C₄F₇N was reduced. In addition, after comparing the experimental results of the two kinds of rubber, it is found that ENB-EPDM is more suitable for sealing C₄F₇N gas mixture than DCPD-EPDM, the difference is due to the different crosslinking efficiency provided by the two third monomers.

Key words： Eco-friendly insulating gas C₄F₇N/CO₂/O₂ EPDM compatibility

收稿日期: 2020-12-28

PACS:

TM213

通讯作者: 张晓星男,1972 年生,教授,博士生导师,研究方向为电气设备绝缘在线监测与故障诊断及评估、纳米新型传感器。E-mail：xiaoxing.zhang@outlook.com

作者简介: 吴鹏男,1996 年生,硕士研究生,研究方向为SF6 替代气体及其相关性质、纳米新型传感器。E-mail：wupeng@whu.edu.cn

引用本文:

吴鹏, 叶凡超, 李祎, 唐炬, 肖淞, 张晓星. C₄F₇N/CO₂/O₂与三元乙丙橡胶的相容性及相互作用机理研究[J]. 电工技术学报, 2022, 37(13): 3393-3403. Wu Peng, Ye Fanchao, Li Yi, Tang Ju, Xiao Song, Zhang Xiaoxing. Compatibility and Interaction Mechanism between C₄F₇N/CO₂/O₂ and EPDM. Transactions of China Electrotechnical Society, 2022, 37(13): 3393-3403.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.201700 https://dgjsxb.ces-transaction.com/CN/Y2022/V37/I13/3393

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