No abstract

A superhydrophobic textile for biomedical applications is designed using chitosan-based hydrophobic nanoparticles. The fabrication of nanoparticles is based on the electrostatic interaction between the amine group of chitosan and the negatively charged fl uoroanion. The coating is formed by spraying the nanoparticles dispersion over the textile surface, while the complementary hydrophobization by functionalized perfl uorodecylsilane leads to substitution of hydrophilic surface groups by hydrophobic ones. The crucial role of the relative number of fl uoroanions per elementary unit of chitosan in both surface wettability and durability of coatings in contact with aqueous media is demonstrated.