碳酸二月桂酯基础油的合成、表征及其润滑性能研究

Synthesis,Characterization and Lubricity of Didodecyl Carbonate as Lubricating Base Oil

以碳酸二甲酯(DMC)和月桂醇(C12H25OH)为原料,甲醇钠为催化剂,采用两步法高效制备碳酸二月桂酯(DDC)。采用红外光谱、质谱、氢谱及碳谱对反应产物结构进行表征,考察反应条件对产物的影响。结果表明,优化条件下,产品收率达89%以上,在100和40℃时的运动黏度分别为3.43和11.77 mm2/s,黏度指数为184,适合作为高黏度指数润滑剂基础油;与传统酯类油癸二酸二异辛酯相比,其具有更加优异的极压抗磨性。

Didodecyl carbonate（DDC） was synthesized via a sodium methoxide-promoted transesterification of dodecanol with dimethyl carbonate. The product was characterized by FT-IR spectroscopy, mass spectroscopy, ^1H and ^13C nuclear magnetic resonance spectrum. The effects of reaction conditions on the reaction outcome were investigated. The results show that, under the optimum reaction conditions, the DDC yield reaches more than 89%. The kinematic viscosity is found to be 3.43 mm^2/s at 100℃ ,and 11.77 mm^2/s at go ℃ with the viscosity index of 184. As a result,DDC is suitable to be high viscosity index lubricant. DDC possesses better extreme pressure and anti-wear properties compared with the traditional ester oil of diisooctyl sebacate.