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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >NMR relaxometry analysis of lubricant oils degradation
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NMR relaxometry analysis of lubricant oils degradation

机译：核磁共振弛豫法分析润滑油的降解

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摘要

The present work was undertaken in order to investigate lubricant oil degradation at the molecular level. Ageing effects, as reflected on the proton spin-lattice relaxation rate (T-1(-1)) dispersion, were studied in two different lubricant engine oils. The proton field cycling technique was used to scan relaxation of new and aged samples of monograde and multigrade oils. Relaxation dispersions were interpreted in terms of self-diffusion and molecular rotations. Our study shows that proton T-1(-1) could be very sensitive to degradation processes, especially at low Larmor frequencies. The analysis reveals a noticeable sensitivity of the involved correlation times. The pros and cons of the technique are also discussed.
机译：进行当前工作是为了在分子水平上研究润滑油的降解。在两种不同的润滑油机油中研究了质子自旋晶格弛豫速率（T-1（-1））分散所反映的老化效应。质子场循环技术用于扫描新的和老化的单级和多级油样品的弛豫。用自扩散和分子旋转来解释弛豫分散体。我们的研究表明，质子T-1（-1）对降解过程非常敏感，尤其是在低拉莫尔频率下。分析揭示了相关时间的显着敏感性。还讨论了该技术的优缺点。

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