Abstract
Microcapsules-enhanced coating emerges as the times require since the traditional organic coating hardly realizes the long-term protection of metal materials. Herein, PSF@PAO40 microcapsules (PPs) were prepared via Poly α-olefin 40 (PAO40) encapsulated within Polysulfone (PSF) shell using solvent evaporation method. Then self-lubricating composite coatings were fabricated by introducing PPs into epoxy resin (EP). The coating structure was characterized using X-ray microtomography (CT), and its relationship with anti-wear/corrosion performance was explored. Compared to pure EP coating, the composite coatings with 10 wt.% PPs demonstrated an 87.9% reduction in friction coefficient and 84.5% reduction in wear rate. Additionally, the lowest frequency impedance (|Z|0.01Hz) increased by 1 order of magnitude. Superior anti-wear/corrosion performance of the composite coatings is primarily attributed to the three-dimensional network distribution structure of PPs, which facilitate continuous lubrication and provide a physical barrier against corrosive media.
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