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Niloufar Norouzi,Majid Montazer,Ali Akbar Gharehaghaji 한국섬유공학회 2022 Fibers and polymers Vol.23 No.12
A combination of two significant requirements of low surface energy and roughness should be utilized to obtainthe lotus effect on polyester fabric. In this research, ZnO nano-particles were first in-situ synthesized on the polyester fabricusing zinc nitrate and NaOH to create nano-roughness as one requirement for producing a superhydrophobic surface. TheZnO pre-treated fabrics were then irradiated under sunlight for seven consecutive days to enhance the hydrophilicity. Theywere then treated with a fluorocarbon-based water repellent through the pad-dry-cure method to generate the surface with lowenergy. The produced fabric considered as a substrate manipulated the lotus topography. The superhydrophobic properties oftreated fabrics were investigated through contact and sliding angles, spray, and water drop tests. The surface morphology wasobserved under SEM, and the presence and distribution of Zn and F elements were proved by EDX and mapping pictures. The self-cleaning behaviors were examined by discoloration of Methylene Blue as a stain under daylight irradiation. Theinfluence of nano ZnO pre-treatment and then daylight irradiation was positively indicated on the fluoropolymer posttreatmentthat was provided a superhydrophobic fabric with sliding and contact angles of 8 and 157.3 °, respectively.