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Couches minces copolymères plasma anti-buée élaboration et caratérisation : élaboration et caratérisation

Abstract : The PhD work is focused on the deposition of a multilayer coating with an anti-fog top layer obtained thanks to the plasma copolymerization of hydrophilic and hydrophobic monomers and an intermediate barrier layer, also obtained by plasma deposition on polycarbonate. The work is divided into 3 parts: the independently preparations of the two monolayers, barrier and anti-fogging ones, then the barrier-antifog multilayer deposition. The characterization of the thin films obtained is based on Fourier Transform Infrared Spectroscopy, X-ray photoelectron spectroscopy and atomic force microscopy.The barrier plasma-layer is issued from by the mixture of dioxygen and one of these three organosilicon precursors : hexamethyledisiloxane ; 2,4,6,8-tetramethylcyclotetrasiloxane ; triethoxyfluorosilane. The influence of the plasma conditions such as discharge power, monomer/dioxygen ratio, deposition duration on the chemical structure and the hydrophobicity of the different types of the organosilicon layers was studied. The results of permeation with liquid water or dioxygen show that the barrier property of the organosilicon layer is more efficient than that of the fluorinated layer. Anti-fog plasma-copolymer is synthetized from two hydrophilic and hydrophobic precursors deposited by pulsed plasma mode. The precursors such as 2-(dimethylamino) ethyl methacrylate and acrylic acid were selected for the hydrophilic part while the 1H, 1H, 2H-perfluoro-1-decene will be associated to the oleophobic part. The dependence of the chemical structure and the morphology of the anti-fog layers is studied according to the hydrophilic/oleophobic distribution and the deposition time.
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Thanh Hien Tran. Couches minces copolymères plasma anti-buée élaboration et caratérisation : élaboration et caratérisation. Polymères. Université du Maine, 2019. Français. ⟨NNT : 2019LEMA1012⟩. ⟨tel-02449683⟩

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