Surface Structuration (Micro and/or Nano) Governed by the Fluorinated Tail Lengths toward Superoleophobic Surfaces

Abstract

As compared to superhydrophobic surfaces, the challenge to obtain superoleophobic properties, surfaces against low-surface-tension probe liquids such as hexadecane, is very important because of their high tendency to wet. From the molecular design of the monomer, it is possible to obtain in one step superoleophobic surfaces by electrodeposition. Hence, we report the synthesis and the characterization of an original series of fluorinated 3,4-ethylenedioxypyrrole (EDOP) derivatives. The electrodeposited polymer films are characterized by contact angle measurements (static and dynamic with various probe liquids), optical profilometry, and scanning electron microscopy. In the view toward reaching superoleophobic properties, a common approach is to increase the number of fluoromethylene units of the surface post-treatment agent. Here, surprisingly, it is possible, in one step, to reach more efficient antioil surface properties by decreasing the length of the fluorinated tail (F-octyl to F-hexyl). This fact can be explained by a double scale of structuration (micro and nano) induced using only F-hexyl tails.

Synthesis and characterization of X-ray opaque polycarbonate urethane: Effect of a dihalogenated chain extender on radiopacity and hemocompatibility

“…FTIR spectra of all three PUs are shown in Figure 2. IR spectrum of all PUs showed absorption peak due to NH stretching of secondary amide around 3317-3336 cm 21 and that due to 55,56 Molecular weights of the PUs were determined by GPC (Table I). Presence of iodine and fluorine was elucidated using EDX spectra (Fig.…”

Highly Oleophobic Properties of PEDOP Polymers with Short Perfluorobutyl Chains Separated by Long Alkyl Spacers and Amido Connectors

“…It was demonstrated that the use of fl uorinated 3,4-ethylenedioxypyrrole (EDOP) derivatives as monomer allowed superoleophobic properties to be reached. [11][12][13][14] They often led to nanoporous/nanostructured surfaces, which was a key parameter in the elaboration of superoleophobic properties. However, it was demonstrated, by cyclic voltammetry experiments, that the formation of surface nanoporosity is highly sensitive to the monomer structure and that the polymer should be very planar to induce this formation.…”

Ultra-oleophobic cotton fabric prepared using molecular and nanoparticle vapor deposition methods

“…Fluorocarbons can be used as an ultra-oleophobic coating [8], however, obtaining rough surfaces with fluorocarbons is difficult [11]. Numerous methods have been used for the fabrication of ultraoleophobic surfaces, including electrodeposition [12], electrospinning [13], sputtering [14], hydrothermal reaction [15], and etching [16]. However, despite the simplicity, low cost, and great versatility, the molecular vapor deposition (MVD) technique requires experimental studies and developments to fabricate ultra-oleophobic surfaces.…”