Polydopamine-AgNPs coated acrylic fabric for antimicrobial and antioxidant textiles

There is an increase in public awareness of functional textiles, which strive to produce innovative fabrics for specific applications. In this context, acrylic polymer, a significant synthetic fabric used in the textile industry, was selected to provide it with multi-functional characteristics. For this purpose, the acrylic fabric was functionalized with amidoxime groups to serve as ligands for immobilizing silver ions so that it can be further in situ reduced to AgNPs. Polydopamine (PDA) has the advantage of being an ion binding and reducing agent by virtue of its phenolic hydroxyl groups capable of reducing silver ions to AgNPs, and it was exploited in this study for imparting the acrylic fabric with antimicrobial and antioxidant properties. Additionally, glucose as a reducing agent was also used to form AgNPs-loaded amidoximated acrylic fabric. The pristine, amidoximated, PDA-coated AgNPs-loaded amidoximated, and AgNPs-loaded amidoxi-mated acrylic fabrics have been characterized using ATR-FTIR, SEM, EDX, and tensile strength. All fabric samples were assessed as antioxidants using DPPH and FRAP assays. Antimicrobial properties against Pseudomonas Aeruginosa, Staphylococcus aur-eus, Escherichia coli and Candida albicans were also evaluated using broth assay. An almost complete killing (99.99%) of the pathogenic Gram -nega-tive Escherichia coli was achieved using PDA-coated AgNPs-loaded amidoximated acrylic fabric. The over-all results indicated that the composite nanocoating using PDA-AgNPs showed good tensile strength and excellent antioxidant and antimicrobial properties to suggest the viability of PDA-AgNPs coating of fabrics for possible application as biomedical textiles.

Automated summary

There is an increasing demand for functional textiles, which has led to research on functionalizing acrylic fabrics. In this study, acrylic fabric was functionalized with amidoxime groups and treated with polydopamine and glucose to impart antimicrobial and antioxidant properties. The results showed that the composite nanocoating using PDA-AgNPs exhibited good tensile strength, as well as excellent antioxidant and antimicrobial properties.