Emulsifying properties of environmental-friendly marine stern tube oil
XU Chao1, LI Shao-ping1, SHI Chao1, MA Xu-xin2
1. School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; 2. Shanghai Research Institute, Sinopec Lubricant Co., Ltd., Shanghai 200080, China
Abstract: 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.
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