Bioinspired surfaces with strong water adhesion by electropolymerization of thieno[3,4-b]thiophene with mixed hydrocarbon/short fluorocarbon chains

[Display omitted] •Preparation of polymer surfaces with lower bioaccumulative potential.•Surfaces produced by electropolymerization.•Thieno[3,4-b]thiophene monomers with both short fluorinated chains and alkyl chain.•Obtaining of both high hydrophobicity and water adhesion. Here, in the aim to repla...

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Bibliographic Details
Published in:Journal of fluorine chemistry 2020-08, Vol.236, p.109574, Article 109574
Main Authors: Thiam, El hadji Yade, Dramé, Abdoulaye, Séne, Aboubacary, Sow, Salif, Dieng, Samba Yandé, Guittard, Frédéric, Darmanin, Thierry
Format: Article
Language:English
Subjects:
Adhesion
Adhesive strength
Bioinspiration
Bubbles
Chains (polymeric)
Chemical Sciences
Conducting polymers
Dichloromethane
Electropolymerization
Hydrocarbons
Hydrophobicity
Material chemistry
Molecular chains
Monomers
Parahydrophobic
Polymer films
Polymerization
Polymers
Wettability
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Summary:[Display omitted] •Preparation of polymer surfaces with lower bioaccumulative potential.•Surfaces produced by electropolymerization.•Thieno[3,4-b]thiophene monomers with both short fluorinated chains and alkyl chain.•Obtaining of both high hydrophobicity and water adhesion. Here, in the aim to replace long perfluorinated chains (C8F17) in polymer we use both a short C4F9 perfluorinated chain and a hydrocarbon chain a various length (from C2 to C12). These chains are grafted to thieno[3,4-b]thiophene monomers to perform electrodeposited conducting polymer films with high hydrophobic properties. Two solvents are used: dichloromethane (CH2Cl2) and dichloromethane saturated with water (CH2Cl2 + H2O) in order to release also in-situ O2 and/ or H2 gas bubbles. In CH2Cl2, spherical particles covering the surface are observed with short alkyl chains and large wrinkles with long alkyl chains. The highest hydrophobicity θw = 139.3° are obtained with Thieno-F4-C6 after 5 deposition scans, which presents also strong water adhesion. In CH2Cl2 + H2O, the surfaces are smoother and traces of very large bubbles are present but only with short alkyl chains. However, the polymer growth is inhomogeneous because the substituents are too flexible to stabilize the released gas bubbles. The preliminary results are encouraging and more rigid substituents or spacers could be envisaged in the future to induce homogenous porous structures.
ISSN:0022-1139
1873-3328
DOI:10.1016/j.jfluchem.2020.109574