title: Superamphiphobic Surfaces Prepared by Coating Multifunctional Nanofluids.
abstract: Construction of surfaces with the capability of repelling both water and oil is a challenging issue. We report the superamphiphobic properties of mineral surfaces coated with nanofluids based on synthesized Co-doped and Ce-doped Barium Strontium Titanate (CoBST and CeBST) nanoparticles and fluorochemicals of trichloro(1H,1H,2H,2H-perfluorooctyl)silane (PFOS) and polytetrafluoroethylene (PTFE). Coating surfaces with these nanofluids provides both oil (with surface tensions as low as 23 mN/m) and water repellency. Liquids with high surface tension (such as water and ethylene glycol) roll off the coated surface without tilting. A water drop released from 8 mm above the coated surface undergoes first a lateral displacement from its trajectory and shape deformation, striking the surface after 23 ms, bouncing and rolling off freely. These multifunctional coating nanofluids impart properties of self-cleaning. Applications include coating surfaces where cleanliness is paramount such as in hospitals and domestic environments as well as the maintenance of building facades and protection of public monuments from weathering. These superamphiphobic-doped nanofluids have thermal stability up to 180 °C; novel industrial applications include within fracking and the elimination of condensate blockage in gas reservoirs.
authors: Chemical Engineering collage, Iran University of Science and Technology (IUST) , Narmak, Tehran 16765-163, Iran.
authors: Pouriya
authors: P
authors: Esmaeilzadeh
authors: Chemical Engineering collage, Iran University of Science and Technology (IUST) , Narmak, Tehran 16765-163, Iran.
authors: Mohammad Taghi
authors: MT
authors: Sadeghi
authors: Institute of Petroleum Engineering, University of Tehran , Tehran 11155-4563, Iran.
authors: Alireza
authors: A
authors: Bahramian
authors: Institute of Petroleum Engineering, University of Tehran , Tehran 11155-4563, Iran.
authors: Zahra
authors: Z
authors: Fakhroueian
authors: School of Biological and Chemical Sciences, Queen Mary, University of London , Joseph Priestley Building, Mile End Road, London E1 4NS, United Kingdom.
authors: Ali
authors: A
authors: Zarbakhsh
keywords: barium strontium titanate (BST); carbonate rock; nanofluid; self-cleaning; stability; superamphiphobicity