Abstract

ZnO nanoparticles have great applications such as photocatalysts and have antibacterial activity and hydrophobic properties. In this research, green synthesis with papaya leaves extracts as a reducing agent for ZnO nanoparticles that applicated on cotton fabric with pad dry-cure method. ZnO nanoparticle coating was carried out at concentrations of 3%, 6%, and 9%. Characteristics resulting from FT-IR and XDR identified ZnO nanoparticles from the synthesis with papaya leaf extract have a crystallinity level of 76.97% with a crystalline size of 39.60 nm. Application of ZnO nanoparticles on fabric showed an increase in the hydrophobic properties of the fabric and good antibacterial activity on the Staphylococcus aureus (gram-positive bacteria) and Escherichia coli (gram-positive bacteria). The highest contact angle of the ZnO nanoparticle-coated fabric is shown in the concentration of 3% which is 113°.  The highest antibacterial activity was shown at the concentration of the largest 9% in Staphylococcus aureus bacteria with an area of inhibition of 23.7 mm and in Escherichia coli with an area of inhibition of 8.3 mm.