Facile approach in fabricating hybrid superhydrophobic fluorinated polymethylhydrosiloxane/TiO2 nanocomposite coatings

Abstract

We have developed a facile, environmentally friendly, and inexpensive method of creating a large-area superhydrophobic surface on steel substrates by a simple spray-coating method. Scanning electron microscopy, Fourier transform infrared spectrophotometry, and contact angle measurement were used to characterize the surface morphologies and wettability of the surfaces. The results showed that the hydrophobic -CH 3 and -CH 2 -groups were introduced into TiO 2 particles which were modified from hydrophilic to hydrophobic. When the weight ratio of modified TiO 2 to fluorinated polymethylhydrosiloxane was 7:3, the as-prepared coating both the micro/nanobinary structure and the low surface free energy layer exhibited superhydrophobic properties with a water contact angle of 161°and a sliding angle of 5°. In particular, the fluorinated polymethylhydrosiloxane/TiO 2 nanocomposite superhydrophobicity surface has excellent durability and corrosion resistance. These fascinating performances make the present method suitable for large-scale industrial fabrication of chemically stable and anticorrosive superhydrophobic surfaces.

Preparation, thermostability, and hydrophobic properties ofTiO2/poly(dodecafluoroheptyl methacrylate) nanocomposites

“…As shown in Figure (a), the vibration absorption at 600 cm −1 and the broad peak at about 3400 cm −1 corresponded to the TiOTi backbone and hydroxyl on TiO 2 surface, respectively . In Figure (b), new peaks of CO bond, CC bond and SiO bond are observed at 1720 cm −1 , 1630 cm −1 , and 1120 cm −1 indicating that nano‐TiO 2 was successfully modified by MPS . Compared with the Figure (b) the peak of CC at 1630 cm −1 disappeared in Figure (c), and it exhibits some new characteristic peaks at 689 and 1000–1240 cm −1 , which should be the wagging vibration and typical stretching vibration of CF and CF 3 .…”

“…Qing et al . designed a large area superhydrophobic coating on the steel substrate through the use of a nanocomposite structure comprised of nano‐TiO 2 powder cast on a fluorinated polymethylhydrosiloxane films. As a result, the obtained nanocomposites possess excellent comprehensive performance especially outstanding hydrophobicity and high thermal stability, well hydrophobicity, and oil repellence properties.…”

Superhydrophobic Coating Using TiO2 NPs/PMHS Composite for Self‐Cleaning Application

“…Qing et al. [ 24 ] have also observed a similar surface morphology for the superhydrophobic coatings prepared from TiO 2 and PMHS. Mostly, the surface of the coatings consists of microscaled grains, which effectively hampers the optical transparency of the coating due to scattering of visible light from the rough surface.…”

Facile Fabrication of Superhydrophobic and Superoleophilic Bulk Materials with Excellent Durability

“…Superhydrophobic surfaces in nature, having a water contact angle (CA) larger than 150° and exhibiting almost no adhesive to water droplets, have numerous applications in corrosion protective coatings [1][2][3] , self-cleaning surfaces [4,5] , oil-water separation, [6][7][8] anti-icing [9,10] , non-wetting fabrics [11,12] , droplet transportation [13] , photonic applications [14] , and so on. However, those natural or artificial superhydrophobic surfaces with micro/nanostructure are easily destroyed by some low load contacts, such as finger contact, abrasive wear, and washing cycles.…”