利用溶解度参数筛选二甲醚发动机油的基础油和添加剂

The Forecast of Base Oils and Additives for Dimethyl Ether Engine Oil by Solubility Parameter

研究了二甲醚、润滑油基础油及其添加剂的溶解度参数。通过二甲醚的热力学性质,计算得到了二甲醚在各温度下的溶解度参数。采用基团贡献法,计算了发动机润滑油基础油、常用添加剂的溶解度参数,并预测了对于二甲醚溶解度低的发动机润滑油组分情况,为筛选二甲醚发动机油的配方提供理论依据。

The solubility parameters （δ） of dimethyl ether, base oils and its additives are studied in this paper. δ of dimethyl ether in different temperatures were calculated by its thermodynamic properties. δ of base oils and additives were estimated by using group contribution method. The compositions of dimethyl ether engine oil were forecasted, which are less soluble in dimethyl ether. The results of this work will contribute to the guidance of formula selection.