Simple method of fabrication of hydrophobic coatings for polyurethanes |
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Authors: | Beata A Butruk Paulina A Ziętek Tomasz Ciach |
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Institution: | 1.Faculty of Chemical and Process Engineering,Warsaw University of Technology,Warsaw,Poland |
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Abstract: | The aim of this study was to develop a method of manufacturing versatile hydrophobic coatings for polymers. Authors present
a simple technique of polyurethane (PU) surface modification with covalently attached silicones (PDMS) or fluorocarbons (PFC).
Diisocyanates were applied as linker molecules. The obtained coatings were characterized using spectroscopic analysis (FTIR),
scanning acoustic microscopy (SAM) and water contact angle measurements. FTIR analysis revealed high efficiency of grafting
reaction. The results of contact angle measurement indicated significant increase of hydrophobicity — from 66° (unmodified
PU) to 113° (PU grafted with PDMS) and 118° (PU grafted with PFC). Acoustic microscopy analysis confirmed satisfactory homogeneity
and smoothness of the fabricated layers. In vitro cell tests revealed non-adherent properties of the surfaces. Both, MTT assay
and fluorescence staining confirmed non-cytotoxicity of the coatings, which makes them potential candidates for use in biomedical
applications.
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