Oxidative stability of prototypical groundnut oil (GO) and mustard oil (MO) blended with a significant characteristic addition of antioxidants, α-tocopherol (α-T) and TBHQ (tert-butyl hydroquinone), at different concentrations was analysed. α-T (natural) and TBHQ (synthetic) antioxidants at a different concentrations from 0 to 20 mg/L were blended with GO and MO to prepare 18 samples. Compositional analysis of groundnut oil and mustard oil was carried out using gas chromatography and mass spectra (GCMS). Electrical properties like dielectric constant, tanδ, specific resistance etc. were investigated at frequencies from 1 Hz to 10 MHz for the modified samples. Thermal properties like breakdown voltage, flash and fire points and viscosity of all samples were also premeditated. It was observed that dielectric constant (ε′) of GO reduces from 3.58 to 2.82 with the addition of α-T but increases to 3.29 with the addition of TBHQ, whereas in MO, dielectric constant increases from 2.93 to 3.38 with the addition of α-T and rises to 3.27 with the addition of TBHQ at 15 mg/L. The synergistic effect of antioxidants in regulating the insulation nature of the oil is found to be more effective with α-tocopherol compared to TBHQ in GO. Higher breakdown voltage and more stability were observed in oil with the addition of antioxidant (TBHQ) in low concentration. The study would be useful in the selection of eco-friendly coolants in engineering and industry.

分析了原型花生油 (GO) 和芥子油 (MO) 与显着特征添加的抗氧化剂 α-生育酚 (α-T) 和 TBHQ（叔丁基对苯二酚）以不同浓度混合的氧化稳定性。将 0 至 20 mg/L 不同浓度的 α-T（天然）和 TBHQ（合成）抗氧化剂与 GO 和 MO 混合以制备 18 个样品。花生油和芥子油的成分分析使用气相色谱和质谱 (GCMS) 进行。在 1 Hz 至 10 MHz 的频率下研究了改性样品的电性能，如介电常数、tanδ、电阻率等。还预先考虑了所有样品的热性能，如击穿电压、闪点和燃点以及粘度。观察到 GO 的介电常数 (ε') 从 3 降低。添加 α-T 时介电常数从 58 增加到 2.82，但添加 TBHQ 时增加到 3.29，而在 MO 中，添加 α-T 时介电常数从 2.93 增加到 3.38，添加 15 mg TBHQ 时介电常数增加到 3.27 /L。与 GO 中的 TBHQ 相比，发现抗氧化剂在调节油的绝缘性质方面的协同作用与 α-生育酚相比更有效。在添加低浓度抗氧化剂 (TBHQ) 的情况下，在油中观察到更高的击穿电压和更高的稳定性。该研究将有助于选择工程和工业中的环保冷却剂。与 GO 中的 TBHQ 相比，发现抗氧化剂在调节油的绝缘性质方面的协同作用与 α-生育酚相比更有效。在添加低浓度抗氧化剂 (TBHQ) 的情况下，在油中观察到更高的击穿电压和更高的稳定性。该研究将有助于选择工程和工业中的环保冷却剂。与 GO 中的 TBHQ 相比，发现抗氧化剂在调节油的绝缘性质方面的协同作用与 α-生育酚相比更有效。在添加低浓度抗氧化剂 (TBHQ) 的情况下，在油中观察到更高的击穿电压和更高的稳定性。该研究将有助于选择工程和工业中的环保冷却剂。