绝缘油抗氧化剂的选择及其协同抗氧化作用  

Choice of Antioxidants Added in Insulation Oil and Its Anti-oxidant Synergistic Effect

作　　者：廖瑞金[1] 郝建[1] 梁帅伟[2] 朱孟兆[1] 杨丽君[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]宁波电业局,宁波315010

出　　处：《高电压技术》2012年第1期124-131,共8页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724505-1);国家自然科学基金(50677073)~~

摘　　要：为了从根本上提高矿物油与天然酯混合绝缘油的氧化安定性,通过加压差示扫描量热法(PDSC)选取了适用于混合油的最佳抗氧化剂复配方式;对比了加入复合抗氧化剂后的矿物油与天然酯混合绝缘油与矿物油在不同温度和不同频率下的介电常数;首次通过分子模拟和红外光谱在分子层面分析了复合抗氧化剂。结果表明:适用于矿物油与天然酯混合绝缘油的最佳抗氧化剂组合为2,6-二叔丁基对甲酚(T501)+高纯度烷基化苯基-α-萘胺(L06),两种抗氧化剂的最佳添加量为0.3%T501+0.3%L06(质量分数);在相同温度和频率下,加入复合抗氧化剂后的矿物油与天然酯混合绝缘油的介电常数大于矿物油;复合抗氧化剂T501+L06的分子模拟和红外光谱分析结果表明,复合抗氧化剂使混合油氧化安定性优于矿物油的原因是T501和L06之间存在协同抗氧化作用。In order to improve the oxidation stability of a mixture oil developed from mineral oil and natural eater,complex antioxidants used in the mixture oil were selected by using high-pressure differential scanning calorimetry（PDSC）.The dielectric constant of mixture oil added into the complex antioxidants were compared with that of mineral oil.The complex antioxidants were also analyzed for the first time by Molecular modeling and FT-IR spectroscopy.PDSC results show that 2,6-di-tert-butyl-p-cresol（T501） and high-purity alkylation-α-naphthylamine（L06） are the best antioxidant used in the mixture oil,and the optimum concentration of the complex antioxidants in the mixture oil is 0.3%T501 ＋ 0.3% L06.The dielectric constant of mixture oil added into the complex antioxidants is higher than that of mineral oil at the same temperature and frequency.Moreover,T501,L06 and T501＋L06 molecular modeling results show that there is no chemical reaction between T501 and L06,and is confirmed by FT-IR spectroscopy of T501＋L06,and the synergistic antioxidant of T501 and L06 makes the mixture oil to exhibit better oxidation stability than mineral oil.

关 键 词：绝缘油 氧化安定性 介电常数 加压差示扫描量热法 分子模拟 红外光谱 协同抗氧化 

分 类 号：TM215.4[一般工业技术—材料科学与工程]