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叶黄素作为蓖麻油绿色润滑天然添加剂的摩擦学与氧化研究

On the Tribological and Oxidation Study of Xanthophylls as Natural Additives in Castor Oil for Green Lubrication.

作者信息

Moreno Karla J, Hernández-Sierra María Teresa, Báez José E, Rodríguez-deLeón Eloy, Aguilera-Camacho Luis Daniel, García-Miranda J Santos

机构信息

Department of Mechanical Engineering, National Technology of Mexico in Celaya (TecNM), Celaya 38010, Mexico.

Department of Chemistry, University of Guanajuato, Guanajuato 36050, Mexico.

出版信息

Materials (Basel). 2021 Sep 19;14(18):5431. doi: 10.3390/ma14185431.

Abstract

The present study focuses on an introductory analysis of the use of three xanthophylls as additives for green lubricant applications. For this purpose, the additives were characterized by FTIR and H-NMR techniques, and the bio-lubricants were described by their physical properties. The effect of the natural compounds on the friction and wear properties of bio-lubricants were evaluated by sliding friction tests under boundary conditions, as confirmed by an analysis of the lubricating film thickness. The antioxidant capacity was analyzed by FTIR spectroscopy. It was observed better wear protection in castor oil with xanthophylls than without these additives. The wear rate was reduced up to 50% compared with neat oil. Lesser beneficial effects were appreciated in friction coefficient since it was increased 25%. The best contribution was observed with astaxanthin as an additive. In addition, a significant improvement in the oxidation of castor oil, complemented with this additive, was exhibited by FTIR analysis. It was found that xanthophylls could be employed as additives for totally biodegradable lubricant applications since they have better tribological and antioxidant behavior than current additives.

摘要

本研究着重对三种叶黄素作为绿色润滑剂添加剂的应用进行初步分析。为此,采用傅里叶变换红外光谱(FTIR)和氢核磁共振(H-NMR)技术对添加剂进行表征,并通过生物润滑剂的物理性质对其进行描述。通过边界条件下的滑动摩擦试验评估了天然化合物对生物润滑剂摩擦和磨损性能的影响,润滑膜厚度分析证实了这一点。通过傅里叶变换红外光谱分析抗氧化能力。观察到添加叶黄素的蓖麻油比未添加这些添加剂的蓖麻油具有更好的抗磨损保护性能。与纯油相比,磨损率降低了50%。由于摩擦系数增加了25%,在摩擦系数方面观察到的有益效果较小。以虾青素作为添加剂时观察到最佳效果。此外,傅里叶变换红外光谱分析表明,添加这种添加剂后,蓖麻油的氧化性能有显著改善。发现叶黄素可作为完全可生物降解润滑剂的添加剂,因为它们比目前的添加剂具有更好的摩擦学和抗氧化性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce55/8468782/b9a2ab01bec0/materials-14-05431-g001.jpg

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