Sliding behavior of water drops on sol–gel derived hydrophobic silica films

Hydrophobic sol–gel coatings based on polydimethylsiloxane for self-cleaning applications

“…There have been few reports of coatings having CA below 150°yet showing good dynamic water repellency. The long-term durability has not been studied in these limited reports [3,4].…”

“…There have been numerous studies on coatings that possess static contact angle (CA) higher than 150°, but in most cases the contact angle hysteresis or dynamic contact angles are seldom reported [16][17][18][19]. In order to possess good self-cleaning performance, low sliding angle (SA) and low interfacial surface energy are required besides having static CA N 150° [ 3,4,[20][21][22]. There have been few reports of coatings having CA below 150°yet showing good dynamic water repellency.…”

“…To achieve effective self-cleaning over a long period of service time, these coatings have to be mechanically durable with high resistance to wear and erosion. Sol-gel technology is the preferred route to produce such coatings [1][2][3][4][5][6][7][8][9] because the desired properties of the coatings can be easily adjusted through formulation, including hardness, surface roughness, transparency, and surface energy, etc. In order to achieve superhydrophobic surfaces similar to that of the lotus leaf, two factors, viz.…”

The influence of the hydrophobic agent, catalyst, solvent and water content on the wetting properties of the silica films prepared by one-step sol–gel method

“…In the sol-gel method, by changing the composition of the reaction mixture, the surface roughness was obtained [9,10]. Latthe et al [11] synthesized hydrophobic coatings on the glass substrate. They prepared silica film using trimethylethoxysilane (TMES) as a hydrophobic agent and methyltriethoxysilane (MTES) as a precursor.…”

Water repellent porous silica films by sol–gel dip coating method

“…In recent years, a great deal of research has been carried out to develop superhydrophobic surfaces using different techniques [5]. Coatings based on organic, inorganic, and organic-inorganic hybrid systems have been developed to achieve water repellent surfaces [6][7][8][9][10][11][12][13][14][15][16][17].…”