One interesting category of nano- and micro-engineered surfaces is surface gradients, which allow the controlled optimization of biointerfaces at a small scale in an extended area length. Plasma coatings offer a large diversity of functionalities at the nanoscale, accompanied by high chemical stability and adhesion on a variety of substrates at ambient temperature. Atmospheric-pressure plasma-assisted deposition could be employed for the generation of surface gradients on thermosensitive materials. In this study, a corona plasma jet is used to deposit polydimethylsiloxane/SiO2-like surface gradients on polyethylene foil by varying the O2 concentration in the discharge during the movement of the plasma source. We obtained, in a single-step approach, gradient coatings along a length of ∼10 cm, with a gradual variation of both chemistry and surface energy.

Single-step deposition of hexamethyldisiloxane surface gradient coatings with a high amplitude of water contact angles over a polyethylene foil

Gallingani T.;Barletta F.;Gherardi M.;Colombo V.;
2021

Abstract

One interesting category of nano- and micro-engineered surfaces is surface gradients, which allow the controlled optimization of biointerfaces at a small scale in an extended area length. Plasma coatings offer a large diversity of functionalities at the nanoscale, accompanied by high chemical stability and adhesion on a variety of substrates at ambient temperature. Atmospheric-pressure plasma-assisted deposition could be employed for the generation of surface gradients on thermosensitive materials. In this study, a corona plasma jet is used to deposit polydimethylsiloxane/SiO2-like surface gradients on polyethylene foil by varying the O2 concentration in the discharge during the movement of the plasma source. We obtained, in a single-step approach, gradient coatings along a length of ∼10 cm, with a gradual variation of both chemistry and surface energy.
Malekzad H.; Gallingani T.; Barletta F.; Gherardi M.; Colombo V.; Duday D.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/865628
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