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Development of Poly(propylene) Superhydrophobic Surfaces by Functionalised TiO 2 Nanoparticles: Effect of Solvents and Dipping Times
Author(s) -
Chagas Gabriela Ramos,
Weibel Daniel Eduardo
Publication year - 2014
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201300218
Subject(s) - contact angle , materials science , wetting , coating , nanoparticle , silane , superhydrophobic coating , chemical engineering , solvent , surface roughness , xylene , surface tension , lotus effect , titanium dioxide , fourier transform infrared spectroscopy , fabrication , composite material , nanotechnology , organic chemistry , chemistry , toluene , medicine , physics , alternative medicine , pathology , quantum mechanics , engineering , raw material
Summary We present a simple strategy for the fabrication of poly(propylene) (PP) superhydrophobic surfaces, i.e., surfaces that show water contact angle (WCA) ≥ 150° after a simple dipping process. Injection‐moulded PP samples were coated with titanium dioxide nanoparticles previously functionalised with trimethoxy propyl silane. Water, ethanol or xylene were used as solvents in the nanoparticles' suspensions. The prepared superhydrophobic surfaces were characterised by WCA, FTIR‐ATR, SEM and profilometry measurements. PP coated samples showed very low wettability, with WCAs higher than 150° when xylene was used as a solvent. The combination of increasing the surface roughness via dipping coating process plus the low surface tension of the coating produced the final superhydrophobic PP substrates.