Preparation of PANI–CuZnO ternary nanocomposite and investigation of its effects on polyurethane coatings antibacterial, antistatic, and mechanical properties

Abstract

In this study, a facile method for the production of Antibacterial and Antistatic polyurethane coatings was investigated using copper modified ZnO nanoparticles-polyaniline nanofibers (PANI-CuZnO) ternary nanocomposite. PANI-CuZnO ternary nanocomposite was synthesized through two steps. First, copper-modified ZnO nanoparticles were produced through the hydrolysis method using acetate precursors, and then they were mixed with polyaniline nanofibers, which were synthesized by seeding method. The obtained nanocomposite was characterized by FTIR, XRD, and FESEM techniques. Results of evaluating the antibacterial action of the polyurethane coatings with the content of ternary nanocomposite showed that the obtained coatings have a proper antibacterial action against Gram-positive and Gram-negative bacteria. In addition, measuring the coatings' surface electrical resistance revealed that addition of the ternary nanocomposite to the polyurethane coatings' matrix causes the surface electrical resistance of the coatings significantly decreases and reaches 8 × 10 7 Ω/sq. Thereby, they could be categorized as an antistatic coating. Moreover, the addition of PANI-CuZnO enhanced adhesion strength and scratch resistance of the final polyurethane coatings.

Ternary Biocidal-Photocatalytic-Upconverting Nanocomposites for Enhanced Antibacterial Activity

“…As shown in the energy level of Yb 3+ and Tm 3+ in UCNP, the 1 I 6 → 3 F 4 and 1 D 2 → 3 H 6 transitions in Tm 3+ produce 350 and 365 nm UV emissions, which are capable of exciting TiO 2 and generating electron–hole pairs. The photogenerated holes can react with the surrounding water to produce •OH, and the photogenerated electrons could reduce O 2 to yield •O 2 – ; these two types of ROS are able to damage the cell membrane and lead to the death of bacteria. , In the meantime, visible emissions from UCNPs (450 and 470 nm) can be absorbed by Ag NPs via plasmonic resonance (λ = 426 nm; Figure d), and the photogenerated electrons can easily transfer from the noble metal (Ag) to the conduction band of the semiconductor (TiO 2 ) and reduce the O 2 to form •O 2 – radicals. The •O 2 – can then react with water and transform to •OH radicals, which has been proven to be one of the most active antibacterial ROS …”

NIR‐Responsive Polyurethane Nanocomposites Based on PDA@FA Nanoparticles with Synergistic Antibacterial Effect

“…[9][10][11][12] In daily use, microorganisms cause decomposition, aging, and decay of industrial materials, pharmaceuticals, buildings, and medical devices. [13,14] However, PU materials are also vulnerable to microorganisms in the process of use because the polyether DOI: 10.1002/macp.202200141 or polyester chain segments in PU macromolecules can become carbon sources for microbial growth, which greatly limits their application. [15][16][17] Nowadays, biocompatible materials that endow their bacteriostatic function are also widely studied.…”