R2R Plasma-Textured Polymer Films Nanostructured AR Hydrophobic Surfaces and EB-Cured Varnish Proxies for Scalable Coatings

This paper demonstrates roll-to-roll oxygen plasma texturing of commodity and engineering polymer films to create stochastic nanotopographies that enhance solar-weighted trans- mittance and water repellence for coatings applications. Acrylic urethane varnish layers cured by electron beam on polymer webs serve as etchable proxy coatings for substrates that are difficult to plasma-pattern directly, with a surface-active siloxane additive modulating nanostructure morphology during etching. Process-to-performance links are quantified via UV-VIS-NIR spectroscopy, SEM, XRD, and static contact angle, showing broadband antireflection gains alongside large hydrophobic shifts while correlating feature evolution to polymer composition and crystallinity. Outdoor exposure of treated fluoropolymer films retains a transmittance advantage over untreated controls over extended periods, indicating durability of the nanotextured coating function under real weathering. The work provides reproducible, scalable parameters for web-based plasma nanostructuring and varnish-mediated patterning, enabling integration of AR and self-cleaning functionalities into polymer coating stacks for architectural, photovoltaic, and automotive uses.