Preparation And Tribological Behavior Of A Self-assembled Non-smooth Film With Bionic Nonsmoothed Surface

Wear is one of the most important reason for failure of material and mechanical equipments. It has an enormous influence for the development of society and economy. Generally speaking, there are four main methods to reduce materials'wear failure. Fist,rational chselect materials and developed new wear-resistant materials. Second, lubrication. Third, surface treatment. Fourth, improved structure design, improved the machining and assembling accuracy. For improving the materials themselves performance and structural bionic microstructures on material surface, IPN/PET/Kaolin film was prepared and its tribological behavior was researched. The relationship betwween friction coefficient and average particle of microspheres, oscillation frequency, farmar quality and mass of microspheres were discussed. The main conclusions as follows:(1)DMSO was used to inserted the layer of kaolin fist, then it was takn place of by PET through melt intercalation method. Thermogravimetic analysis shows that the material thermal stability improved, new material's friction coefficient is reduced.(2)PVA for network agent, PET/kaolin composite microspheres were prepared using polymer network gel method. The average particle size and dispersion of composite microspheres decreased with PVA concentration.(3)The relationship betwween friction coefficient, surface roughness and average particle size of microspheres, oscillation frequency, farmar quality and mass of microspheres was researched. When average particle size of microspheres is 1.15μm, oscillation frequency is 2KHZ, farmar quality is 80g, mass of microspheres is 18%, friction coefficient and surface roughness get minimum value. Friction coefficient increases with load increases, wear-resisting times decrease with load increases. Friction coefficient and surface roughness has nonlinear corresponding relationship.(4)The surface roughness of self-assembled film was measured using TR200 surface roughness instrument. It shows that surface of the film has homogenous convex package/indentation microstructure distribution, and possesses fractal characteristics, the value of D is betwween 1.66 and 1.77. (5)The film has well tribological behavior in small load condition prepared by 3d self-assembly technology, has prospective that be used in low load and high speed sliding work condition as anti-wear protective film.