Durability and restoring of superhydrophobic properties in silica-based coatings

Disturbing stability of interface by adopting phase-change temperature gradient to reduce ice adhesion strength

“…However, there are many literatures that have reported the superhydrophobic surfaces with poor durability owing to experiencing multiple freeze-thaw cycles or subjecting in high humidity conditions (Bharathidasan et al, 2014;Chen et al, 2012;Dodiuk et al, 2012;Farhadi et al, 2011;Jung et al, 2011;Lazauskas et al, 2013;Kulinich et al, 2011;Nosonovskv et al, 2012). The superhydrophobic coating is weakened by various factors, including surface microstructure damage, surface contamination and et al (Boiniovivh et al, 2012;Farhadi et al, 2011;Kulinich et al, 2011;Lazauskas et al, 2013;Ozbay et al, 2016;Oberli et al, 2010;Mahadik et al, 2013;Shin et al, 2011;Wang et al, 2015;Zhu et al, 2014). Kulinich and co-workers (Kulinich and Farhadi, 2011) have investigated that the microstructure of the superhydrophobic surface gradually destroyed after the icing and de-icing experiment, and other researchers consider that the damaged microstructure of the superhydrophobic surfaces is caused by the compressive stress generated during ice expansion (Lazauskas et al, 2013;Oberli et al, 2014).…”

The durability of superhydrophobic films

“…Zhang et al [6] regenerated the superhydrophobicity of an oil-contaminated superhydrophobic carbon nanotube coating by thermally removing the oil at 350 °C and Page 5 of 56 A c c e p t e d M a n u s c r i p t restored a mechanically damaged superhydrophobic coating once more by repeating chemical vapor deposition of fluorinated silane. A prolonged contact of the superhydrophobic surface with the aqueous medium induces hydrolysis of hydrophobic molecules and production of Si-O-Si bonds, and further hydrolysis of these Si-O-Si bonds produces Si-OH bonds [7,8]. This leads to facile penetration of water molecules into the interface between the substrate and coating, which in turn reduces the adhesion of coatings.…”

“…This leads to facile penetration of water molecules into the interface between the substrate and coating, which in turn reduces the adhesion of coatings. Long-term mild nitric acidic interaction partially shows the negative impact on surface methyl groups of a superhydrophobic film [8]. Mahadik et al [8] repaired a damaged superhydrophobic silica surface by modification treatment using trimethylchlorosilane at room temperature.…”

“…Long-term mild nitric acidic interaction partially shows the negative impact on surface methyl groups of a superhydrophobic film [8]. Mahadik et al [8] repaired a damaged superhydrophobic silica surface by modification treatment using trimethylchlorosilane at room temperature. Fu et al [9] fabricated a superhydrophobic surface by spin-coating a mixture of a polydimethylsiloxane precursor and silicon dioxide nanoparticles at an appropriate ratio and restored the superhydrophobicity of a mechanically damaged surface by spin-coating another more transparent coating (with lower proportion of polydimethylsiloxane).…”

UV-curable nanocasting technique to prepare bioinspired superhydrophobic organic-inorganic composite anticorrosion coatings

“…Water drops on such surfaces cannot penetrate the micro-or nanostructures and wet the surface, resulting in extremely high contact angles; thus, these naturally occurring leaves exhibit considerable superhydrophobicity. Numerous methods, including photolithography [6], plasma treatment [7], templates [8], chemical deposition [9], solgel processes [10], chemical vapor deposition (CVD) [11], casting, and chemical etching [12], have been utilized to fabricate superhydrophobic surfaces. Several studies have been reported on using polymers and polymer nanocomposites for various applications such as fabricating hydrophobic/superhydrophobic surfaces [13][14][15][16][17][18][19][20][21].…”