WATER-BASED ACRYLIC POLYMER/ZnO–Ag NANOCOMPOSITE COATING FOR ANTIBACTERIAL APPLICATION

Abstract

The goal of this work is to study the antibacterial activity of acrylic polymer/ZnO–Ag nanocomposite coating. First, in the presence of UV light ([Formula: see text][Formula: see text]nm), Ag nanoparticles (NPs; derived from AgNO3 precursor) were photoreduced and deposited on the surface of nano-ZnO. Field emission scanning electron microscope (FE-SEM) images indicated that the AgNPs (5–15[Formula: see text]nm) were deposited on the surface of nano-ZnO (20–40[Formula: see text]nm). These ZnO–Ag nanohybrids (0.1–0.2[Formula: see text]wt.%) were incorporated into the acrylic polymer matrix using ultrasonication to form the nanocomposite coating ([Formula: see text][Formula: see text][Formula: see text]m thick). Nano-ZnO hybridized with AgNPs resulted in a decrease in the energy gap ([Formula: see text] of ZnO from 3.2[Formula: see text]eV to 2.7[Formula: see text]eV, as observed by diffused reflectance UV–Vis spectrum analysis. The abrasion resistance test indicated that the incorporation of hybrid NPs enhanced the abrasion resistance of the polymer coating (from 81 to 125[Formula: see text]l/mil). Moreover, the polymer nanocomposite coating showed high antibacterial efficacy against [Formula: see text]. coli and [Formula: see text]. aureus in antibacterial tests and achieved 1.8 and 1.2 log after 24[Formula: see text]h, respectively. These findings endorse that the ZnO–Ag nanohybrid-based water-borne nanocomposite coatings offer exceptional antibacterial efficiency and would be promising in this application.

Synergistic effect of oxide nanoparticles and inorganic inhibitor on anti-corrosion performance of epoxy coating

“…and 41% of increase for ZnO@Ce 3+ (upto 117 L/mil.). This finding is coherent with the previous works on the UV-cured acrylate epoxy coating (with ZnO@Ag nanoparticles, Nguyen et al , 2022a) and the acrylic polymer coatings (with SiO 2 @Ag nanoparticles, Le et al , 2019; or with ZnO@Ag nanoparticles, Vu et al , 2022). These nanoparticles could reduce the porosity of the coating, not only by taking place in the hollows, pinholes or voids, but also by serving as bridges to interconnect the coating matrices.…”

Photocurable acrylate epoxy/ZnO–Ag nanocomposite coating: fabrication, mechanical and antibacterial properties

“…24,25 For UV-curable systems, inuence of certain additives on their photocrosslinking are reported. 26 Recently, Nguyen et al 27,28 reported the synthesis and antibacterial activity of ZnO-Ag nanohybrids. The authors found the good antibacterial activity against Staphylococcus aureus and Escherichia coli bacteria, even at low content (<40 mg mL À1 ) with the higher inhibition areas.…”

“…12,[18][19][20][21][22] For the crosslinking of thermoset resin system, the presence of additives can affect to the components of paint formulations. [23][24][25][26][27][28][29][30][31][32][33] Regarding the epoxy nanocomposite, nanollers could act as a bridge for the interconnected molecules, and thus reduce the free volume and increase the crosslinking density. 24,25 For UV-curable systems, inuence of certain additives on their photocrosslinking are reported.…”