Facile fabrication of ultraviolet light cured fluorinated polymer layer for smart superhydrophobic surface with excellent durability and flame retardancy

Abstract

Functional superhydrophobic coatings have raised wide concern due to their promising application in superhydrophobic paints, packaging materials, building materials etc, which call for the requirements of mechanical stability and flame retardancy. Herein, a series of UV cured superhydrophobic PVDT coatings with mechanical stability and flame retardancy were prepared using an all-in-one suspension containing trimethylolpropane triacrylate (TMPTA), vinyltriethoxysilane (VTES), 1H, 1H, 2H, 2H-Perfluorododecanethiol (PFDT), 9,10-Dihydro-9-Oxa-10-Phosphaphenanthrene-10-Oxide (DOPO), nano-SiO2 particles, and 2-Hydroxy-2-methylpropiophenone (HMPP). The reaction mechanism, surface morphology, phase composition of the PVDT coatings were investigated by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), respectively. The PVDT coatings exhibited excellent low adhesion against water droplets, superhydrophobicity and self-cleaning property when the content of nano-SiO2 reached to 40 wt%. Good mechanical and chemical stability of PVDT coatings was confirmed by abrasion test, tape adhesion test and corrosive media treatment. Further, the combustion experiments indicated that the PVDT coatings exhibited excellent flame retardancy and significant ignition delay. All these results demonstrated that the prepared PVDT coatings tended to achieve wide application in waterproof and fireproof materials.