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合成酯类基础油的水解性能研究
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国家重点基础研究发展规划(973计划)项目(2013CB632301)


Research on Hydrolytic Stability of Synthetic Ester Base Oils
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    摘要:

    合成酯类润滑油分子结构中的酯键由于亲水性较强极易发生水解。为研究合成酯的水解过程与水解机制,选取5种常用合成酯类基础油,采用高压反应釜按SH/T 03011993标准进行水解试验,研究合成酯分子结构、水解时间、水解温度以及水含量等因素对合成酯水解稳定性的影响。研究表明:合成酯空间位阻越大,初始酸值越小,水解稳定性越好,其中初始酸值比分子结构的影响更大;水含量对合成酯水解性能的影响不大,水解速率主要取决于油水接触面积,而水解温度和时间对合成酯水解性能的影响较大;温度升高或时间延长,合成酯水解稳定性减弱,表现在油品酸值变化增大、运动黏度减小以及颜色加深等。

    Abstract:

    The hydrolytic stability of synthetic ester is poor due to the presence of ester bond in the molecular structure,which is highly susceptible to hydrolysis.To study the process of hydrolysis of synthetic ester,the experiments of hydrolytic stability was carried out in a high pressure autoclave according to the standard of SH/T 03011993 for selected five kinds of synthetic ester base oils.The effects on the hydrolytic stability of synthetic ester were researched by the molecule structure of synthetic ester,hydrolytic time,hydrolytic temperature and water contents,and etc.The results show that the synthetic ester with lower initial acid value and stronger steric hindrance is exhibited of a better hydrolytic stability,and the effect of initial acid value on the stability is more notable than that of molecule structure.Compared with hydrolysis time and temperature,the water content has little effect on the hydrolytic stability of synthetic ester and the hydrolysis rate is mainly depended on the oilwater contact area.With the increasing of reaction temperature and time,the hydrolytic stability of synthetic ester becomes weakened,and a series of varieties of synthetic ester are appeared,such as higher acid value change,lower kinematic viscosity as well as deeper color,and so on.

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马海红,李维民〓〓,马瑞,王晓波.合成酯类基础油的水解性能研究[J].润滑与密封,2016,41(5):53-58.
MA Haihong 〓〓, LI Weimin, MA Rui,WANG Xiaobo. Research on Hydrolytic Stability of Synthetic Ester Base Oils[J]. Lubrication Engineering,2016,41(5):53-58.

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  • 在线发布日期: 2016-06-16
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