New Type of Antiwear Additives Based on Quaternary Ammonium Salts of Dialkyldithiocarbamic Acids for Silicone Lubricants

IF 0.5 4区工程技术 Q4 ENGINEERING, MECHANICAL

Journal of Friction and Wear Pub Date : 2023-06-22 DOI:10.3103/S1068366623010075

A. S. Lyadov, E. Yu. Oganesova, A. A. Kochubeev, O. P. Parenago

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Abstract—

A method is proposed for the preparation of antiwear additives based on quaternary ammonium salts of dialkyldithiocarbamic acids by non-catalytic interaction of stoichiometric amounts of the corresponding diamine, carbon disulfide, and tetraalkylammonium chloride in the presence of sodium hydroxide in which the interaction of the initial components is carried out in one stage. All synthesized additives are highly soluble in polyorganosilicone oils, and at a concentration of 0.5–1.0 wt % they exhibit antiwear activity, which is expressed in a significant decrease (in some cases more than twice) in the diameter of the wear scar when tested on a four-ball friction machine. It has been shown that an increase in the length of alkyl groups in the anionic part of the additives leads to a more effective antiwear effect, the same trend manifests itself with an increase in the number of carbon atoms of alkyl groups in ammonium salts. The influence of the concentration of additives on the antiwear properties of lubricating compositions has been studied. The proposed type of additive is a promising friction modifier for silicone lubricants.

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基于二烷基二硫代氨基甲酸季铵盐的新型有机硅润滑油抗磨添加剂

摘要:提出了一种在氢氧化钠存在下，通过相应的二胺、二硫化碳和四烷基氯化铵的化学计量量的非催化相互作用制备二烷基二硫代氨基甲酸季铵盐抗磨添加剂的方法，其中初始组分的相互作用是在一个阶段进行的。所有合成的添加剂都高度可溶于聚有机硅油，在0.5-1.0 wt %的浓度下，它们表现出抗磨活性，在四球摩擦机上测试时，其表现为磨损疤痕直径显着减少(在某些情况下超过两倍)。结果表明，添加剂阴离子部分烷基长度的增加，抗磨效果更明显;铵盐中烷基碳原子数的增加，也有同样的趋势。研究了添加剂浓度对润滑组合物抗磨性能的影响。所提出的添加剂是一种很有前途的有机硅润滑剂摩擦改性剂。

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来源期刊

Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

1.50

自引率

28.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.

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