Abstract
Inorganic–organic composite coatings with fluoroethylene vinyl ether (FEVE) resin as polymer matrix and sodium iron titanate (NFTO) whiskers with different aspect ratios as reinforcement filler are prepared by the liquid-phase blending method. The influence of aspect ratio and content of NFTO whiskers on the morphology, and the mechanical and tribological performances, of NFTO-reinforced FEVE composite coatings are investigated. The addition of NFTO whiskers can obviously enhance the mechanical and wear resistance performances of the composite coatings and reduce the friction coefficient. The worn surface and wear debris of the composite coatings are studied with scanning electron microscopy (SEM) to reveal the friction-reducing and wear resistance mechanisms. The composite coating filled with ~10 wt.% NFTO whiskers has the best wear resistance performance, since the monodispersed hard whisker can carry the load applied on the sliding surface and reduce the adhesive wear of the polymer matrix. Among the three types of NFTO whiskers, the whiskers with a medium aspect ratio show the best reinforcement effect since they provide the optimum mechanical support to the polymer matrix and cannot be pulled out from the matrix easily.
Highlights
Polymeric coatings have been widely applied in various industrial fields, such as marine equipment, construction, automobiles, etc., to improve the surface performance of products [1,2]
Improving the mechanical strength and wear resistance performance of fluorine-olefin/vinyl ether copolymer (FEVE) coating is of great practical significance
The main objective of this work is to compare the mechanical and tribological performances of fluorocarbon composite coatings reinforced by whisker shaped titanium-based fillers with different aspect ratios
Summary
Polymeric coatings have been widely applied in various industrial fields, such as marine equipment, construction, automobiles, etc., to improve the surface performance of products [1,2]. Improving the mechanical strength and wear resistance performance of FEVE coating is of great practical significance. Inorganic–organic composites have attracted significant attention by introducing hard reinforcement fillers or friction-reducing fillers to improve the hardness, stiffness, compressive strength, and wear resistance performance of matrix [8,9]. The commonly used inorganic fillers or micro/nano particles include carbon nanotubes, glass fibers, MoS2 , and ceramics [10,11]. Their chemical composition, sizes, shapes, and filling content can be tuned to meet the requirement of Coatings 2019, 9, 683; doi:10.3390/coatings9100683 www.mdpi.com/journal/coatings
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