Dual‐Coating of Fluorinated Polydimethylsiloxane/Fluorinated SiO2 Nanoparticles for Superhydrophobic and High‐Efficiency Bacteriostatic Surface

Abstract

AbstractA simple two‐step spray method is used to prepare superhydrophobic and bacteriostatic surfaces, involving dual‐coating with polydimethylsiloxane‐normal‐fluorine (PDMS‐NF) or branched‐fluorine (PDMS‐BF) in combination with fluorinated silica nanoparticles (FSiO2‐NPs) using a spray technique. This approach has the potential to create surfaces with both water‐repellent and antimicrobial properties, which could be useful in a variety of applications. It is noteworthy that the dual‐coating on cotton fabric exhibited an impressive dual‐scale roughness and achieved superhydrophobicity with a water contact angle of 158° and a hysteresis of less than 3°. Additionally, the coating was subjected to an ultra‐high concentration of bacteria (109 CFU/mL) and was still able to inhibit more than 80 % of attachment, demonstrating its effectiveness as a bacteriostatic surface.