Tribological Properties Of Poly Ether Aqueous Solutions With Boric Acid Ester Containing Nitrogen

With the emergence of the world energy crisis and the social attention of the environmental protection, water-based lubricant develops rapidly and will play more and more important role in industrial fields. In this study, the water-based lubricant, the1:1(w/w) solution of lauric acid random copoly-ether (LPE):boric acid triethanolamine (BN) is prepared. Friction-reducing, anti-wear, rheology, film-forming performances and mechanism analysis of BN-LPE solution are tested, taking LPE solutions as reference groups.The friction-reducing and anti-wear performances of lubricants are studied by the four-ball tribometer. The influences of concentration, load and revolution to friction-reducing and anti-wear performances are considered. The products on the grinding surface are analyzed by X-ray photoelectron spectroscopy instrument (XPS). The surface morphology is analysized by Micro XAM type3-D surface profile meter. The results reveal that BN-LPE solution has well friction-reducing and anti-wear properties. Moreover, friction-reducing performance gets better and better with the increasing of concentration. The average friction coefficient is about0.03in solution of15%～35%; the minimum friction coefficient is as low as0.005. BN decomposes and reacts with LPE, producing new type boric acid ester and playing effective friction-reducing and anti-wear properties by adsorbing on the metal surface, forming a compact chemical reaction film.Rheology of BN-LPE aqueous solution is tested by physica MCR301rotating rheometer. Then getting the relation curve between dynamic viscosity and shear rate of different quality concentration and temperature in BN-LPE aqueous solution. The dynamic viscosity of BN-LPE aqueous solution is small, this may be the reason for well friction-reducing performance.Considering the influences of film performance on concentration, load and linear velocity in half soak, BN-LPE aqueous solution is analysized by NGY-6nanoscale lubrication film thickness gauge. Results reveals that BN-LPE solution has well film performance and relatively a certain stable carrying capacity; with the increasing of the load, the linear velocity to the influence on the film performance is small; the lubricating solution in trials may form the chemical adsorption membrane by analyzing.This paper studied the tribological properties of boric acid ester containing nitrogen in polyether aqueous solution, the test showed that the water-based lubricant had well friction-reducing, anti-wear properties and a well industrial application prospect.