Anti-fingerprints fluorinated coating for anodized titanium avoiding color alteration |
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Authors: | Walter Navarrini Tommaso Brivio Dmitrij Capobianco Maria Vittoria Diamanti Mariapia Pedeferri Luca Magagnin Giuseppe Resnati |
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Affiliation: | (1) Dipartimento di Chimica, Materiali e Ingegneria Chimica G. Natta, Politecnico di Milano, via Mancinelli 7, 20131 Milan, Italy;(2) Praxair S.r.l., 23804 Monte Marenzo, LC, Italy |
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Abstract: | In this study amorphous fluorinated coatings applied to anodized titanium surface have been investigated. A copolymer between
tetrafluoroethylene and perfluoro-4-trifluoromethoxy-1,3-dioxole (AD60) and two perfluoropolyether containing ammonium phosphate
(F10) or triethoxysilane (S10) functionalities have been tested. To estimate the color alteration of the anodized titanium
surfaces due to the application of the coatings, spectrophotometric analyses have been made. Water and n-dodecane contact angles as well as apparent surface energy have been evaluated. Ellipsometry and atomic force microscopy
data have been used to measure the thickness of the fluorinated coatings. A tailored mechanical preliminary test has also
been explored to evaluate the adhesion of the coatings on the anodized titanium surface. The resistance to surface soiling
with castor oil was also preliminarily investigated. The fluorinated coating tested on anodized titanium showed a low apparent
surface energy and high chromatic aspect conservation, this is particularly evident for the titanium anodized coated with
triethoxysilane functionalities fluoropolymers S10. |
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