Evaluation of TiO2 and ZnO atomic layer deposition coated polyamide 66 fabrics for photocatalytic activity and antibacterial applications

Abstract

Atomic layer deposition (ALD) is a versatile technique to functionalize textile substrates due to its ability to create conformal films on the fibers’ surface. Photocatalytic activity and antibacterial activity of TiO2 and ZnO films deposited onto polyamide 66 fabrics were investigated. ALD coated fabrics were examined to eliminate Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) bacteria with ISO 20645 and AATCC 100 standard methods. Both materials were only slightly successful for the elimination of E. coli. However, ZnO films were more effective in killing S. aureus bacteria than TiO2 films independent of incubation conditions (i.e., under dark or ambient light). Deposited films were characterized using SEM, FTIR, UV-Vis, and XPS spectroscopy techniques. Furthermore, the samples’ photocatalytic activity was determined by measuring methylene blue degradation as a model organic molecule showing that ZnO films were better photocatalysts as deposited. The films’ antibacterial mechanism is mainly due to ions dissolving from the films into the bacterial solutions.

In Situ Polymerization of Antibacterial Modification Polyamide 66 with Au@Cu2O-ZnO Ternary Heterojunction

“…This is due to the coordination of metal ions with the C=O peak, which reduced the stretching vibration of C=O. This alteration affected the intensity of the characteristic peak at 1629 cm −1 [ 33 , 34 ].…”

“…The absence of new peaks and the IR inactive of the heterojunction indicate the lack of chemical reactivity be tween Au@Cu2O-ZnO and PA66.It is noteworthy that, as the content of the heterostructure increased, the C=O stretching vibration band of PA66 decreased relative to the -CH2 band This is due to the coordination of metal ions with the C=O peak, which reduced the stretch ing vibration of C=O. This alteration affected the intensity of the characteristic peak at 1629 cm −1 [33,34]. Figure 5a illustrates the FTIR-ATR spectra of pure PA66 and PA66/Au@Cu 2 O-ZnO composites.…”

Preparation, Antimicrobial Properties under Different Light Sources, Mechanisms and Applications of TiO2: A Review

“…TiO 2 and its modified composites show excellent photocatalytic antimicrobial activity after light irradiation. They have broad application prospects in food packaging and preservation [ 129 ], self-cleaning fabric [ 130 , 131 ], and so on [ 129 , 132 ].…”

Chlorine Induced In-Situ Growth of TiO2 Nanoparticles on PVC Nano Fibers

“…The TiO 2 and fabric composites can be fabricated by various methods, such as hydrothermal reaction [9], sol-gel [10], self-assembly [11] and immersion precipitation [12]. So far, some types of fabrics like cellulose [13], polypropylene (PP) [14], polyester (PET) [15], polyamide (PA) [16], polyacrylonitrile (PAN) [17] and polyvinylidene fluoride (PVDF) [18] have been reported to be able to load TiO 2 NPs and form nanocomposites.…”