Morphological, Optical, Electrical Characterizations and Anti- Escherichia coli Bacterial Efficiency (AECBE) of PVA/PAAm/PEO Polymer Blend Doped with Silver NPs;

Abstract

In the current research, silver nanoparticles (AgNPs) were mixed with a polymer blend to enhance their optical and electrical properties and antibacterial efficiency. A novel approach via introducing AgNPs into the polymer blend could improve the physical and antibacterial characteristics of the nanocomposites (NCs). In the loading process, two different amounts of AgNPs were respectively encapsulated with polyvinyl alcohol (PVA), polyacrylamide (PAAm) and polyethylene oxide (PEO) polymeric blend via casting method. The prepared films were characterized by X-ray, optical microscope (OM), scanning electron microscopy (SEM), Fourier transformation infrared (FTIR) and UV/Visible. The OM and SEM images showed that the AgNPs were well diffused inside the polymer blend with some weak aggregations. The optical properties were enhanced after doping. The NCs films absorbed UV-ray at (λ=220 nm). The indirect energy gap decreased after loading from 3.80 to 3.10 eV but the direct energy gap decreased from 4.25 to 3.75 eV. The AC electrical properties were studied in the frequency range between 100 Hz to 5 MHz. The dielectric constant and loss of NC films were decreased with the increase of AgNPs, while the electrical conductivity increased. The inhibition zone diameters of Escherichia coli bacteria increased with the increasing of AgNPs contents.

Effect of Loading Corn Starch Nanoparticles on the Morphological, Optical, and Dielectric Behaviors of PVA/PMMA/PAAm Polymer Blend for Optoelectronic and Antibacterial Applications

“…This finding is consistent with the findings of Ref. [52,53], who discovered that antimicrobial action depends on the characteristics of amine side chains. The length of an amine's alkyl chain enhances the hydrophobic contact with the lipid bilayer of the cell wall, which boosts antimicrobial efficacy [15].…”

Examination the antibacterial activity for the TiO2 nanoparticles which is prepared by hydrothermal method and mixed with plant and animal extracts (Onion peels and Chitosan peels)

“…This was associated with a rise in the total number of charge carriers. Similar behavior was reported in [23].…”

Antibacterial Activity and Optical Behavior for Restoration of Micro and Nano Dental Fillers Using Functional Graphene Nanosheets with Polymethyl Methacrylate

“…Eng., 2024 [1,2]. Despite these benefits, polymeric composites have some disadvantages, for instance, polymerization contraction with affinity for bacterial adhesion [3,4]. In addition, micro-organisms exists between the dental restoration and healthy tissues have easy access to the regenerated dental tissues via microcavities at the tooth-restoration interface [5].…”