The effect of sintering regime on superhydrophobicity of silicon nitride modified ceramic surfaces

Abstract

The most common method of obtaining a superhydrophobic surface is to create a specific surface morphology and then coat it with a hydrophobic polymer. Numerous such morphological surfaces have been developed but are often fragile. Ceramic-based coatings show longer life with high wear resistance. In this study, surface micro-nano surface morphology was developed with β-Si 3 N 4 powder and the influence of sintering regime on contact angle of ceramic surfaces was investigated. The contact angle, surface energy and surface roughness were determined from the developed surfaces and surface morphology analyzed by scanning electron microscopy, phase evolution was determined by X-Ray diffraction. Changes in sintering regimes lead to different phase evolutions, roughness, surface topography, surface free energies and contact angles. The superhydrophobicity resulted mainly due to the surface structure/topography in the micro-nano hybrid structures of β-Si 3 N 4 crystals. The highest water contact angle achieved was 166º of the samples sintered at 980°C for 5 min.

Synthesis of zeolite‐derived blue nanopigment and its modification for hydrophobic coating on ceramic tile

“…Different materials and methods, including variations in temperature calcination, have been applied in these investigations. [29][30][31][32] A noteworthy example is the work by Qiao et al, which introduced a unique method to create hydrophobic silica particles using SDS as a modifying agent. 25 The process involved mixing in water, spray drying, and thermal treatment, eliminating the need for organic solvents.…”

Movement characteristics of the inclined surface flow of the open channel on the nanoscale surface

“…In physics, when a contact angle of water and a fluid-repellent surface is more significant than 140°, even at the slightest tilt, the water turns to drops and independently rolls off. Observing a lotus leaf under an electronic microscope, a micro relief of epidermal cells about 5–15 μm in height can be seen coated with a layer of wax crystal about 1 nm in diameter [ 7 ]. The chemical composition of this wax crystal causes effective water repellency, minimizes the contact area, and maximizes the contact angle when water lands on such surfaces.…”

Effect of Solvent on Superhydrophobicity Behavior of Tiles Coated with Epoxy/PDMS/SS

“…A material is known to be superhydrophobic when it has a water contact angle of more than 150 • and a negligible titling angle of less than 10 • [1,2]. Superhydrophobic coating has gained more attention and lead to many applications such as antiicing [3,4], anti-fogging [5,6], oil-water separation [7,8], anti-corrosion [9][10][11], selfcleaning [12,13], antibacterial [14,15] and biomedical applications [16]. Various methods that have been used for preparation of rough surfaces are layer by layer assembly [17,18], spray-coating [19][20][21], lithography [22,23], sol gel processing [24,25], electrochemical deposition [26,27] and chemical vapour deposition [28].…”