为了考察乳化剂和助乳化剂对环保型船用艉轴油乳化稳定性的影响，分别以乳状液的储存时间、离心析水量和乳液的平均粒径及其粒径分布作为乳状液稳定性的评价指标，研究了乳化剂种类、HLB值、乳化剂质量分数、助乳化剂种类以及助乳化剂质量分数对环保型艉轴油乳化稳定性的影响。结果表明：在环保型船用艉轴油体系中，乳化剂Span 80和Tween 80复配效果最好，且最佳HLB值为6。添加助乳化剂Hypermer B246能进一步增强乳状液的稳定性。提高乳化剂和助乳化剂的质量分数均可增加乳状液的储存时间，降低乳状液的离心析水量和平均粒径，从而提高乳状液的稳定性。

In order to study the influences of emulsifier and co-emulsifier on the emulsion stability of environmental-friendly marine stern shaft oil (EFMSTO),taking storage stability,centrifugal stability,average droplet size and droplet size distributions of emulsion as evaluating indexes,the influences of emulsifier types,Hydrophile-Lipophilic Balance (HLB) value,dosage of emulsifier,types of co-emulsifier and dosage of co-emulsifier on the emulsion stability of EFMSTO are studied.The results indicate that the properties of emulsion formulated with Span 80 (sorbitan mononleate) and Tween 80 (sorbitan polyoxyethylene mononleate) are the best,and the optimum HLB value is 6.Meanwhile,using co-emulsifier Hypermer B246 can further improve the stability of emulsion.Moreover,increasing the mass fractions of emulsifier and co-emulsifiers both can prolong storage duration of EFMSTO emulsion and decrease centrifugal yield of water and average droplet size,thus improve its stability.

徐超(1990-),男,硕士研究生,主要从事润滑油与添加剂的研究工作,Syrupxu@163.com