CAJ | 학술논문

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。
위료종근본상제고광물유여천연지혼합절연유적양화안정성,통과가압차시소묘량열법（PDSC）선취료괄용우혼합유적최가항양화제복배방식;대비료가입복합항양화제후적광물유여천연지혼합절연유여광물유재불동온도화불동빈솔하적개전상수;수차통과분자모의화홍외광보재분자층면분석료복합항양화제。결과표명：괄용우광물유여천연지혼합절연유적최가항양화제조합위2,6-이숙정기대갑분（T501）＋고순도완기화분기-α-내알（L06）,량충항양화제적최가첨가량위0.3%T501＋0.3%L06（질량분수）;재상동온도화빈솔하,가입복합항양화제후적광물유여천연지혼합절연유적개전상수대우광물유;복합항양화제T501＋L06적분자모의화홍외광보분석결과표명,복합항양화제사혼합유양화안정성우우광물유적원인시T501화L06지간존재협동항양화작용。
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.