GODEAU , Guilhem

International audience

Chitosan is a polymer obtained by deacetylation of chitin, and chitin is one of the major components of the arthropod cuticle. Chitin and chitosan are both polysaccharides and are considered to be an interesting class of biosourced materials. This is evident as chitosan has already demonstrated utility in various applications in both industrial...

International audience

Here we report for the first time the use of dithiolane as platform for reversible surface functionalization with switchable water and oil-wettability. That platform allows to prepare switchable superhydrophobic/hydrophilic surfaces and oleophobic/oleophilic surfaces. Based on a poly(3,4-ethylenedioxythiophene) surface bearing dithiolane...

Here we report for the time, the use of Staudinger–Vilarrasa reaction for fast surface functionalization. Using poly(3,4-ethylenedioxythiophene) nanofibrous surfaces bearing azido groups, this reaction allows for the functionalization of surfaces with amide linker in just 3 h. The functionalization by long alkyl chains induces the formation of...

This work reports for the first time the use of electrodeposition to prepare platform mesh substrates with controlled wettability by post-functionalization. First, PEDOT nanofibers with azido (N3) groups are electrodeposited around the mesh wires. Then, the Huisgen reaction is used using various alkynes (alkyl, perfluoroalkyl and aryl) in order...

The formation of materials with switchable wettability is extremely important for various applications such as in separation membranes or liquid transportation. Here, we report for the first time the use of imine bonds in order to prepare switchable hydrophobic/hydrophilic surfaces. Based on a poly(3,4-ethylenedioxythiophene) surface bearing...

Here, we report the first use of Staudinger-Vilarrasa reaction with perfluorinated surface modification. Based on a 3,4-ethylenedioxythiophene (EDOT) monomer bearing azido groups, we develop ante and post deposition strategies in order to prepare functionalized surfaces. The Staudinger-Vilarrasa reaction allows to reduce the azido groups into...

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...

Staudinger-Vilarrasa reaction is an efficient pathway to make amide bound starting with azide and carboxylic acid. That fast reaction is a key tool for synthesis of wild range of monomers for electrodeposition. In this work, we report the first use of Staudinger-Vilarrasa reaction in order to prepare monomers for hydrophobic and...

The control of the surface structures and surface energy is extremely important for various potential applications. Here, we report for the first time the synthesis of 3,4-ethylenedioxythiophene (EDOT) derivatives with a nucleoside linker for surface post-functionalization using the Huisgen reaction. Various alkynes are used in order to graft...

Here, we report for the first time the use of poly(3,4-propylenedioxythiophene) as platform for surface post-functionalization using the Staudinger-Vilarrasa reaction in order to covalently link perfluorinated chains and obtain various hydrophobic/oleophobic properties. 3,4-propylenedioxythiophene with one or two azido groups are prepared, in...

International audience

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...

International audience

Biopolymers and their derivatives are materials with increasing interest for industry and especially for sustainable engineering development. Among such kind of materials, carbohydrate polymer like highly deacetylated chitin (chitosan) is widely used for a wide range of applications, including material and biomedical developments. The majority...

International audience

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National audience

This work presents a new strategy of plasma treatment and post-functionalization of polycarbonate substrates in order to enhance their hydrophobic properties. While the plasma treatment is used to change the morphology and increase the roughness, the Huisgen reaction is used to decrease the surface energy or to add specific properties. Surface...

Here, we report for the first time the use of the Click Chemistry both to modify the surface morphology and to obtain superhydrophobic properties. Using the Click Chemistry as a post-functionalization of poly(3,4-ethylenedioxythiophene) nanofibers bearing azido groups, we show that the nanostructures already present on the surface as well as...

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...