Surface Morphology of Silica Films Derived by the Sol-Gel Method and Its Application to a Water Repellent Glass

Surface Modification with Silicon Sol on Cotton Fabrics for Water-Repellent Finishing

“…The water repellence grade gain 4 scales. ____________________ 7 The sol was prepared by 0.1 mol TEOS, 0.8 mol ethanol, 2 ml 0.01 N HCl, 7 ml H 2 O at 65 o C for 6 hours, which was added 0.5 wt% HTEOS. The cotton fabrics were treated with sols and dried at 90 o C, annealed at 120 o C for 2 minutes.…”

“…Organoalkoxysilanes have been widely used as structural units to construct a variety of silicabased hybrid materials (Yu et al, 2007;Vince et al, 2006). Hydrophobic and water-repellent coatings derived from the sol-gel process have been investigated in recent years because of their high commercial and industrial importance (Bhagat et al, 2006;Daoud et al, 2006;Hye et al, 2001;Makita et al, 1997;Nakagawa & Hiwatashi, 2002;Sanchez et al, 2005;Satoh et al, 2003;Vince et al, 2006;Yu et al, 2001). Previous studies indicated that water-repellent cotton fabrics were prepared by a low-degree substitution of long chain alkyl groups.…”

Effect of the Addition of TiO2 to SiO2 Films with Concave-Convex Surface Derived by the Sol-Gel Method on Film Hardness and Application to Water-Repellent Glasses for Automotive Windows.

“…We have already reported that the mixture of two kinds of sols with greatly different average molecular weights derived from tetraethoxysilane (Si(OC2H5)4, TEOS) and methyltriethoxysilane (CH3Si (OC2H5)3, MTES) yielded the coating films with various surface morphologies. 6 In this study we examine the relationship between film hardness of silica based films with concave-convex surface and conditions for film prepara t ion, such as TiO2 concentration in the SiO2-TiO2 system, heat treatment temperature and heat treatment time.…”

Atomically Bonded Transparent Superhydrophobic Coatings

“…Similarly, powder-based coatings exhibit poor durability due to the application-specific polymer-based binding agents. Sol-gel based coatings have a propensity for better bonding, but they generally exhibit poor hydrophobic qualities (low water CA) due to the lack of nanoscale sharpening and porosity [26,32,33]. Coatings based on nanoarrays or nanoparticles and lithographic techniques possess similar problems as polymer or sol-gel based films [13].…”