Surface-structured polyurethane substrates and methods for producing the same

摘要

The present invention relates to surface-structured polymeric substrates comprising or consisting of polyurethane and having ordered surface structures in the nanometer range based on deposited nanoparticles as well as to a method for producing these substrates. Said method comprises the following steps:
(a) preparing a first precursor substrate that is nanostructured on at least one surface with inorganic nanoparticles,
(b) coating a hardenable substrate material for a second substrate different from the first precursor substrate material onto the nanostructured surface of the precursor substrate, which surface was obtained in step (a), and wherein the hardenable substrate material comprises cross-linkable monomeric, oligomeric or polymeric starting components for the production of a polymeric substrate, and
(c) hardening of the hardenable substrate material to obtain a polymeric substrate,
(d) separating the precursor substrate from the polymeric substrate from step (c), as a result of which a polymeric substrate nanostructured with nanoparticles is obtained, wherein the polymeric surface-structured substrate from step (d) comprises a polyurethane. In a preferred embodiment of the invention, the nanoparticles are bonded to the surface of the polyurethane substrate without the use of a linker.