Search

Vegetal and animal reigns offer many examples of surfaces with surprising and interesting wetting properties. As example, springtails present superoleophobic properties allowing to live in soil and Lotus leaves show self-cleaning ability even under rainfalls. Indeed, it is known that self-cleaning properties can help to remove dust and particles during rainfalls and as a consequence to clean the surface. The bioinspiration of these surface properties is of a real interest for industrial applications in the nanotechnology field such as photovoltaic systems or anti corrosive material. Here, we use a strategy based on electropolymerization to obtain these properties. The Staudinger-Vilarrasa reaction is used to prepare innovative 3,4-ethylenedioxypyrrole (EDOP) monomers with fluorinated chains. Using C6F13 or C8F17 chains, the polymer surfaces formed after electrodeposition show superhydrophobic and superoleophobic features. Here we study the surface wettability depending on the surface energy (based on the perfluorinated chain length), the surface roughness and morphology. [ABSTRACT FROM AUTHOR]

Graffiti can sometimes be a problem when put in an inappropriate place. We looked at a means to prevent such inconvenience. In this work, we explore the possibility of developing surfaces with controlled wettability. If the paint does not spread, the graffiti does not stay. Here, the synthesis and electrodeposition of original 3,4-ethylenedioxythiophene (EDOT) with perfluorinated nucleolipids (ante approach) is reported. The elaboration of similar surfaces using post functionalization is also described. All the prepared surfaces were then investigated for their roughness, wettability, and morphology. Highly hydrophobic features are reported (θ = 137°) and oleophobic properties are also reported (θ = 110°) showing real potential for the control of surface wettability and for potential anti-graffiti applications, consequently. The surfaces obtained with the ante approach are rougher and more hydrophobic. [ABSTRACT FROM AUTHOR]

In this work, we report for the first time the use of the one-pot Staudinger Ureation to link an azido monomer to a perfluorinated amine by taking advantage of a variation of the Staudinger reaction using CO 2 as an electrophile to form an isocyanate in - situ . The formed isocyanate directly reacts with various perfluorinated amines to form the corresponding urea. This chemical pathway is successfully used to prepare new perfluorinated monomers. The monomers were then electrodeposited to form structured surfaces with different wetting properties. Various properties were obtained such as: parahydrophobicity, super hydrophobicity, oleophilicity and strong oleophobicity. This study shows the important influence of the perfluorinated chain on both polymerization and surface properties. This work also illustrates the efficiency of the one-pot Staudinger Ureation for new urea monomer elaboration. [ABSTRACT FROM AUTHOR]

Surface modifications are keys for a great number of applications. In order to perfectly control the surface properties, it is important to control the modification pathways. Two general pathways can be described in order to introduce modification on surfaces: the post-strategies and the ante-strategies. In this work, we focus on the comparison between the Huisgen and the Staudinger-Vilarrasa reaction for both post-surface and ante-surface modifications. Here, we focused on the possibility to use both two reactions to obtain superhydrophobic and oleophobic properties. This work includes monomer synthesis, surface modifications with alkyl, aryl or perfluoroalkyl chain. Copyright © 2016 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

Here, we report for the first time the use of poly(3,4-propylenedioxythiophene) as tunable platform for surface post -functionalization. In this work, we report the synthesis and polymerization of 3,4-propylenedioxythiophene monomer bearing one or two azido groups. The available position for modification per monomer will impact the post -functionalization and as a consequence the surface final properties. The formed surfaces were post -functionalized using various alkyl chains. The post -functionalized surfaces were then studied for their surface morphologies and wettabilities. This work allows to link the surface final properties to the number of function available for post -functionalization. Here, we show that the hydrophobic properties increase more with two functional groups with a change from hydrophobic to parahydrophobic and even superhydrophobic properties. [ABSTRACT FROM AUTHOR]

Here, we report the synthesis of original hydrocarbon/perfluorocarbon mixed chain azides for surface post-functionalization. The use of mixed side chain allows to get fluorine properties with reduced amount of fluorine. The synthetized azide are grafted on surface using the Huisgen reaction. Post-modified surfaces were then investigated for their wettability, morphologies and roughness. [ABSTRACT FROM AUTHOR]

Postfunctionalization is a key tool for the elaboration of hydrophobic surfaces. For that purpose, the elaboration of surfaces suitable for the Huisgen reaction allows for functionalization with various hydrophobic side chains. Here the synthesis of azido or alkyne monomers is reported to prepare platform surfaces suitable for click chemistry. The surface hydrophobicity and morphology are investigated. Superhydrophobic and parahydrophobic properties are obtained depending on the starting monomer and the molecule used for the postfunctionalization. [ABSTRACT FROM AUTHOR]

Reported for the first time is the use of click chemistry to make layer-by-layer multiple post -functionalization treatments. The use of triazole as a platform for the post -functionalization allows the introduction of new clickable structures on the surface. The layer-by-layer strategy by means of click chemistry allows the introduction of both multiple and/or different consecutive modifications on the surface and multicharged species. Herein it consists of the use of molecules functionalized by a 1-azido group and propargyl bromide to deposit functionalized triazolium-type charged oligomers on the substrate. Moreover, different functional groups can be introduced at each step, which amplifies the use of this strategy for many potential applications. Here, to give an example of applications, that strategy is used to introduce alkyl chains and obtain highly hydrophobic materials. Moreover, it is shown that the surface morphology can also change after each treatment. [ABSTRACT FROM AUTHOR]