Preparation of Layered α-ZrP Nanosheets by Intercalation and Its Tribological Properties Study
Using layered α-Zr(HPO4)2·H2O(α-ZrP)as precursor,dodecyltrimethylammonium bromide(DTAB)intercalated DTAB-ZrP was synthesized by indirectly intercalation method.XRD and electron microscopy were used to characterize the crystal structure and morphology of DTAB-ZrP.FT-IR,TGA and CHN elements analyzer were used to an-alyze the organic group and organic content of DTAB-ZrP samples.The effect of DTAB-ZrP as an additive on rheological properties and tribological properties of lithium grease were studied by rheometer and four-ball tester.The wom surface of friction pairs were characterized and analyzed by 3D optical surface profilometer,scanning electron microscope and X-ray energy chromatograph.The results show that the synthesized DTAB-ZrP has good crystallinity,which can improve the vis-coelastic and viscosity-temperature properties of base grease.DTAB-ZrP grease exhibits good carrying capacity,excellent friction-reducing and anti-wear properties under different loads and long time running conditions.The chemical element analysis results of the worn surface show that during the friction process,DTAB-ZrP forms a physical protective film on the surface of the friction pair.
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