| Sciences et Ingénierie de la Matière Molle - Physico-chimie des Polymères et Milieux Dispersés |  |
Journal articles
Tailoring of elastomeric grafted coating via sol-gel chemistry of crosslinked polymethylhydrosiloxane
Abstract : Thin coating of crosslinked polymethylhydrosiloxane are grafted on silica using sol-gel process that leads to polymer layers tailored in term of thickness and elasticity. The degree of crosslinking is tuned by sol-gel polycondensation of a mixture of methyldiethoxysilane(DH) HSi(CH3)(OCH2CH3)2 and triethoxysilane (TH) HSi(OCH2CH3)3, yielding triethoxysilane-based networks. Samples with well-defined thicknesses from nanometer to micrometer range are prepared by sol-gel dip-coating method on silicon surface. Homogeneous or gradient-thickness coating can be produced in this way. It results in surface-attached networks bearing SiH functionalities covalently anchored to the substrate. Powdered gels of DH/TH composition from 50/50 to 95/5 (mol %) were also prepared for a comparison purpose. The structure of the gels was investigated by NMR and FTIR, showing that DH/TH mixtures react totally to yield homogeneous matrix. The surface-attached polymer films are very stable and present high hydrophobicity as evidenced by contact angle measurements. Their surface and mechanical properties have been qualitatively studied using the atomic force microscopy
https://hal.archives-ouvertes.fr/hal-00164881
Contributor : Annie Mettendorff <>
Submitted on : Wednesday, November 18, 2020 - 10:19:54 AM
Last modification on : Friday, January 15, 2021 - 3:32:51 AM
Long-term archiving on: : Friday, February 19, 2021 - 6:49:35 PM
Contributor : Annie Mettendorff <>
Submitted on : Wednesday, November 18, 2020 - 10:19:54 AM
Last modification on : Friday, January 15, 2021 - 3:32:51 AM
Long-term archiving on: : Friday, February 19, 2021 - 6:49:35 PM
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app.25295.pdf
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