Study On Dispersion Of Magnesium Silicate Hydroxide In PAO10 Base Oil And Its Tribological Properties

Synthetic magnesium hydroxysilicate(MSH)nanoparticles are used as nano-additive,which has excellent anti-friction and anti-wear properties.After being dispersed in the lubricant and placed for a long time,the MSH nanoparticles have a serious precipitation phenomenon.On the one hand,the occurrence of precipitation phenomena will lead to instability of tribological properties.On the other hand,in the large-scale production,the time span of MSH nanoparticles from production to actual use is extremely large.Therefore,improving the dispersion properties of MSH nanoparticles is a problem that needs to be solved in the process of further application.The purpose of this paper is to find a process that can significantly improve the dispersion properties of MSH nanoparticles in PAO10 base oils.The dispersion properties before and after this improvement were then evaluated and the relationship between dispersion properties and tribological properties was investigated.The method of improving the dispersion of the MSH nanoparticles was carried out in two steps.Firstly,under the premise of the same dispersion time and ratio,the dispersion sequence of MSH nanoparticles was comprehensively explored,and the dispersion sequence with the best dispersion performance was found.Then,following this dispersion order,the optimal dispersion time and the optimum dispersion ratio were determined.Finally,the improved dispersion method of the MSH nanoparticles was finally found.Next,the effects of different MSH nanoparticles dispersion methods on the dispersion properties and tribological properties were discussed.The dispersion method before the improvement has the worst dispersion properties,and its tribological properties become better and then worse.The improved dispersion method significantly improves the dispersion properties of MSH nanoparticles,while the tribological properties are the most stable.Finally,the paper concludes that both dispersion and tribological properties are directly related to the particle size of MSH nanoparticles.