Surface modification and antibacterial activity enhancement of acrylic fabric by coating silver/graphene oxide nanocomposite.

In this study, silver/graphene oxide (Ag/GO) nanocomposite was synthesized via the in − situ method using nanocellulose (NCs) obtained from sugarcane bagasse as a reducing agent. The synthesis conditions, including AgNO₃:NCs mass ratio, temperature, and reaction time, were investigated. The results showed that the suitable condition was 1:1 in the AgNO₃:NCs mass ratio at 60 °C for 60 min. The results indicated that the silver nanoparticles (AgNPs) were evenly distributed on the GO sheets with a size of 5 − 30 nm. Besides, the cytotoxicity of the Ag/GO nanocomposite was also assessed with three cell lines, including human embryonic kidney cells (HEK − 293), liver cancer cells (Hep − G2), and lung cancer cells (A549). Ag/GO possesses the ability to inhibit cancer cells of Hep-G2 and A549 with respective IC₅₀ values of 86.11 ± 1.74 μg/mL and 106.85 ± 2.15 μg/mL. Therewithal, the antibacterial acrylic fabric (AF) was fabricated by dip − coating in an Ag/GO suspension (Ag/GO/AF). The Ag/GO/AF was hydrophobically modified with 5 g/L of stearic acid (Ag/GO/AF − SA) in ethanol solvent for 180 min, resulting in the fabric having high hydrophobicity with a contact angle of 116°. Additionally, the plate diffusion method was used to evaluate the antibacterial activity of fabrics against two strains of Pseudomonas aeruginosa (P. aeruginosa) and Staphylococcus aureus (S. aureus) bacteria. The results showed that the Ag/GO/AF − SA has an antibacterial ability with a large antibacterial diameter of 24 ± 0.34 mm and 25 ± 0.35 mm for P. aeruginosa and S. aureus, respectively. Moreover, the colorfastness of Ag/GO/AF and Ag/GO/AF − SA also possess high durability. [ABSTRACT FROM AUTHOR]