Abstract
Triazinedithiol polymeric nanofilm was prepared on a pure aluminum surface by electrochemical polymerization of AF17N. The mechanism of the process was proposed and electrochemical polymerization parameters were investigated. The triazinedithiol polymeric nanofilm had notable lubricity, high dielectric property and superhydrophobic property due to the allyl and fluoro alkyl groups in the AF17N monomer. The chemical structure of poly (6-(N-allyl-1,1,2,2-tetrahydroperfluorodecyl)amino-1,3,5-triazine-2,4-dithiol monosodium) nanofilm (PAF17) was investigated by analysis of FT-IR spectra and X-ray photoelectron spectroscopy (XPS). The optimal conditions for the preparation process were based on the data of film weight and thickness. The optimal parameters of monomer concentration, electropolymerization time and temperature were 5 mM, 6 min and 15 °C, respectively. The electropolymerization mechanism was a radical polymerization reaction. It is expected that this technique will be applied in industrial fields for aluminum and aluminum alloy to achieve functional surfaces.
Highlights
Since the publication of Mori K’s results on the corrosion protection property of triazinedithiols (TDTs) on copper surfaces [1], adsorption and polymerization of TDTs on metal surfaces have received increasing attention in the past few years
In order to find the optimal concentration of AF17N, FT-IR spectra and X-ray photoelectron spectroscopy (XPS) spectra of PAF17 nanofilms obtained by electropolymerization for five minutes at 25 °C were studied
It was presumed that the anion of triazinedithiol monosodium in the solution could diffuse to the aluminum surface very slowly, which influenced the rate of the electropolymerization reaction
Summary
Since the publication of Mori K’s results on the corrosion protection property of triazinedithiols (TDTs) on copper surfaces [1], adsorption and polymerization of TDTs on metal surfaces have received increasing attention in the past few years. The electropolymerization process offers the advantages of simultaneous adsorption and polymerization on a metal surface in monomer-electrolyte solution, and the possibility of controlling their chemical and physical properties by changing electrochemical parameters (e.g., current density, potential, monomer concentration, supporting electrolyte, etc.). Triazinedithiol molecules with allyl and fluoro alkyl groups in their structure have been studied for many years, because these polymeric nanofilms have notable lubricity [6], high dielectric [11,12] and hydrophobic properties [13,14]. We concentrate on the research of the electrochemical mechanism and influencing factors for preparing PAF17 nanofilm, which is obtained from triazinedithiol monomer with allyl and fluoro alkyl groups
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