Enhancing the Robustness of Superhydrophobic Coatings via the Addition of Sulfide

Abstract

Micro/nano hierarchical structures with special wettability impart a wide spectrum of unique properties to the superhydrophobic surfaces that are applicable in different potential fields. Therefore, it is necessary to develop advanced superhydrophobic materials with excellent wear-resistance properties. In this study, PDMS-based robust superhydrophobic coatings, which used MoS 2 or WS 2 as a solid lubricant, PDMS as a binder, and SiO 2 as a filler, were prepared on glass substrate by the one-step air spaying method. Lamellar MoS 2 and WS 2 with high crystallinity had intrinsic hydrophobic properties. The MoS 2 @SiO 2 -PDMS (MSP) and WS 2 @SiO 2 -PDMS (WSP) coatings with very rough textures showed good water-repellent behavior with water contact angles of 167.8 and 166.2°, respectively. The results demonstrated that the addition of microsized MoS 2 or WS 2 could easily format micro/nano second-level hierarchical structures, thus realizing the superhydrophobic properties. The friction coefficient decreased gradually with the increasing in MoS 2 or WS 2 . A 4:1 ratio of SiO 2 to MoS 2 /WS 2 could cause the samples to preserve their superhydrophobic properties even after 100 cycles on the abraser. As a result, superhydrophobic coatings with excellent wear resistance will be good candidates for water-repellent surfaces to meet practical emerging needs in industry applications.

Formation of Robust Polydimethylsiloxane Coatings on the Flexspline Material and Mechanism of the Tribological Property Improvement

“…The friction coefficient decreases gradually with an increase in the content of MoS 2 or WS nanoparticles in PDMS coatings. Consequently, superhydrophobic PDMS coatings with excellent wear resistance have been developed . Another important factor to consider during PDMS modification is the adhesion force.…”

“…Consequently, superhydrophobic PDMS coatings with excellent wear resistance have been developed. 23 Another important factor to consider during PDMS modification is the adhesion force. By incorporating inorganic nanoparticles, Shin et al achieved an improvement of 426% in the adhesion force as compared with pristine PDMS.…”

Nanofiber Composite Coating with Self-Healing and Active Anticorrosive Performances

“…As a severely destructive phenomenon, metal corrosion generally occurs in all metal-relevant fields, including construction, transportation, microelectronics, mechanical engineering industries, etc., resulting in enormous economic losses and potential safety concerns. − Various strategies have been developed to mitigate corrosion issues on the basis of metal passivation and physical isolation. − Among those, polymeric coating is one of the most ubiquitous methods to overcome corrosion activities by limiting the interaction between metallic substrates and aggressive media . Although effective, the coating is susceptible to suffer damages during the application process, possibly causing catastrophic failure of the entire protective layer.…”

Robust Superamphiphobic Coatings Based on Raspberry-like Hollow SnO2 Composites

“…The ratio of two types of nanoparticles and the ratio of resin and nanoparticles have a great influence on the surface morphology, roughness, wettability, and stability of the superhydrophobic coating. 42 1H,1H,2H,2H-perfluorodecyltriethoxysilane (FAS-17) is used as the hydrophobic surface modifier of nanoparticles, and epoxy resin is used as an adhesive. A superamphiphobic coating is finally achieved by the spray-coating or drop-coating method.…”

“…In order to obtain a suitable roughness, they are combined with hydrophilic nano-SiO 2 . The ratio of two types of nanoparticles and the ratio of resin and nanoparticles have a great influence on the surface morphology, roughness, wettability, and stability of the superhydrophobic coating . 1 H ,1 H ,2 H ,2 H -perfluorodecyltriethoxysilane (FAS-17) is used as the hydrophobic surface modifier of nanoparticles, and epoxy resin is used as an adhesive.…”