Via Performance to Degradation: Oxidation Mechanism of Biodegradable Polyalphaolefin Base Oil for Electric Drive Systems.

IF 2.8 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

ChemPlusChem Pub Date : 2025-10-23 DOI:10.1002/cplu.202500413

Elisabeth Distler, Joachim Albrecht, Kevin Holderied, Didem Cansu Güney, Markus Kiefel, Katharina Weber

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Abstract

An additive-free, low-viscosity polyalphaolefin (PAO) has been oxidized under pure oxygen at elevated pressure and temperature. This biodegradable PAO base oil is a promising candidate for use as a motor-gear lubricant in electrical drive systems. The oxidation behavior is systematically investigated to evaluate its thermal stability and long-term performance. Rheological measurements are performed to assess viscosity, water content is quantified, tribological tests determine the coefficient of friction, and Fourier-transform infrared spectroscopy is used to monitor chemical changes during oxidation. All analytical methods consistently revealed a two-step oxidative degradation process. It is proposed that the first stage involves the formation of carbonyl compounds and water without compromising lubrication properties, while the second stage-triggered by hydrolysis of oxidation products-leads to chain scission and initiates the desired degradation. This two-stage mechanism is discussed in the context of technological functionality and sustainability requirements for next-generation electric drive lubricants.

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从性能到降解：电力传动系统用可生物降解聚烯烃基础油的氧化机理。

研究了一种无添加剂、低粘度的聚α -烯烃（PAO）在高温高压下的纯氧氧化过程。这种可生物降解的PAO基础油是一种很有前途的候选者，可以用作电气驱动系统中的电机齿轮润滑剂。系统地研究了氧化行为，以评价其热稳定性和长期性能。流变学测量用于评估粘度，水分含量被量化，摩擦学测试确定摩擦系数，傅里叶变换红外光谱用于监测氧化过程中的化学变化。所有的分析方法一致地揭示了一个两步氧化降解过程。有人提出，第一阶段包括羰基化合物和水的形成，但不影响润滑性能，而第二阶段由氧化产物水解引发，导致链断裂并启动所需的降解。在下一代电驱动润滑油的技术功能和可持续性要求的背景下，讨论了这种两阶段机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ChemPlusChem CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

5.90

自引率

0.00%

发文量

200

审稿时长

1 months

期刊介绍： ChemPlusChem is a peer-reviewed, general chemistry journal that brings readers the very best in multidisciplinary research centering on chemistry. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies. Fully comprehensive in its scope, ChemPlusChem publishes articles covering new results from at least two different aspects (subfields) of chemistry or one of chemistry and one of another scientific discipline (one chemistry topic plus another one, hence the title ChemPlusChem). All suitable submissions undergo balanced peer review by experts in the field to ensure the highest quality, originality, relevance, significance, and validity.