Abstract
A large-area spray coating process is introduced to efficiently apply a graphene/Cu/cellulose composite on a flexible glass substrate. The dispersion characteristics of nano-additives are measured and the Tyndall effect observed. The characteristics of the composite coating such as the film thickness, surface roughness, water contact angle, and lubricating characteristics are measured. The tribological properties of the composite coating are measured using a ball-on-disk. The wear width of the abrasive parts, as well as the wear and friction coefficient of the grinding balls, are investigated. Adding graphene/Cu helps to improve the anti-wear ability of cellulose. The transfer layer was observed using the Raman spectroscopy and mapping technology. Finally, the lubricating mechanism is discussed, and the wear mechanism is proposed. Nanoparticles existed in the wear track as the third-body particles and improved the load capacity of the composites. The wear mechanism of the composites is discussed in terms of the worn surfaces and the analysis of the transfer film with the third-body approach.
Highlights
Consumer electronics such as smartwatches, smartphones, head-up displays, and computer screens, as well as automotive electronics and flexible devices, have attracted much attention in the last few decades, increasing the demand for large area and flexible substrates
Large-area spraying technology was developed, and nano-graphene/copper/cellulose composite coatings (NGCC) were prepared on flexible glass the velocity accommodation mechanism of S5M3
The surface roughness increases with the increase in additive owing to the particle agglomeration
Summary
Consumer electronics such as smartwatches, smartphones, head-up displays, and computer screens, as well as automotive electronics and flexible devices, have attracted much attention in the last few decades, increasing the demand for large area and flexible substrates. The demand for protecting the surface of substrates increased. The substrates are coated with different materials to prevent any damage. The efficient use of electronic products with an increased service life of electric films is a topic worth exploring. There are not many studies on the preparation of protective coatings on large-area glass substrates. A protective layer was prepared by spraying technology on a flexible substrate and its lubricating characteristics were studied
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