Transparent anti-fingerprint coating
A facile construction of transparent and amphiphobic coatings has been established by simply casting aqueous suspension of chitin nanofibers (ChNFs) on glass substrate and then modified using 1H,1H,2H,2H-perfluorodecyltrichlorosilane (PFDTS) through vapor deposition. The coating showed static contact angles of 156° and 97° for water and oleic acid, and the coating possessed anti-fingerprint property.
Anti-fingerprint protection for optical lenses
Moreover, after 5 rubbings with an ethanol-socked cotton ball or 100 wipes with a lens cloth under a load of 200 g, the water contact angle and oleic acid contact angle of the ChNFs coatings remained larger than 120° and around 80°, respectively, and the change in transmittance was <1.7 %. Such properties suggested that the prepared transparent and amphiphobic ChNFs coatings are promising in anti-fingerprint protection for optical lenses/sensors and display screens.
The study has been published in Progress in Organic Coatings, Volume 172, November 2022.