The preparation of antibacterial eco-friendly bio-based PTT-based β-cyclodextrin by complexation of copper and zinc ions

There has been an increasing focus on antibacterial textiles owing to their widespread applications in global public health. In this study, we prepared antibacterial bio-based poly (trimethylene terephthalate) (PTT) by multi-crosslinking with citric acid among PTT and beta-cyclodextrin (beta-CD), and then adsorbing zinc and copper ions. The results show that beta-cyclodextrin was successfully grafted onto the surface of PTT. The adsorption amounts of Zn2+ and Cu2+ on beta-CD/PTT were investigated by ICP and FE-SEM, which showed that Zn2+ and Cu2+ penetrated the fabric surface. Moreover, under optimal adsorption conditions, the adsorption capacity of Zn2+ and Cu2+ are about 34 mg/g and 50 mg/g, respectively. During antibacterial test, the bactericidal rates of beta-CD/Cu2+/PTT reached 90.75% for E. coli and 85.36% for S. aureus, and the bactericidal rates of beta-CD/Zn2+/PTT are 80.48% for E. coli and 73.10% for S. aureus. Functionalized PTT fabrics with eco-environmental and sustainable performance may have promising application in the field of antibacterial fabrics.